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Verilink DIU 2130 User Manual

1. RS 449 422 ElA 530 V 35 TO DIM 2530 TO DIM 2035 TO DIM 2449 DCE DCE DCE CHAS GND 1 CHAS GND _ IDEST TEES A CHAS GND SIG GND 7 SN puo 19 Me 2 Le TD BA ole ATS 4 SOU _ REES a ala T2 BA MN 22 P 1 RD 4 3 L RD BB p DSR L gt LTU 6 e 6 RD BB RLSD e F 1 LTU gt 24 RT 4 a RTS CA DIT 7 Le DERG H e RS 9 RTS CA i LT 25 4 SO T ER 5 CTS CB SD M Bee p mer a CTS CB DET m a 27 I me 2 e DSR CC rom nl OM p 22 DSR CC RD o9 DM I sex cs TI TR 4 20 4 DIR CD _ y bq SCTE 12 DTR CD aa TRO 23 RERO w Le SCTE 13 L ARG a DCD 9 CF y SCR pew gt gt BER o DCD CF SCR y Oy 31 IE 5 TSET DCE DB SCT 4 1 Ya lm d 2 TSET DCE DB SCT 23 ST a 4 7 RSET DCE DD g MTO p 34 PIN m g RSET DCE DD Female 26 er 24 TSET DTE DA 17 ne T L TSETDTE O DA 35 L a ay je HL e d TM 25 jo HA L gt DB 25 DC 37 Female DCE to DSU Data and Clock Timing Signals At the DCE interface on the DIU data from the equipment being sent towards the network is referred to as Send Data SD Data from the network being sent towards the equipment is referred to as Receive Data RD Figure 7 3 Figure 7 3 Send Data SD and Receive Data R
2. Alarm Code Description 801 Port 1 Loss of Signal Alarm 802 Port 1 Loss of Signal Cleared 803 Port 2 Loss of Signal Alarm 804 Port 2 Loss of Signal Alarm Cleared 805 Port 1 Abnormal Station Code Exceeded Alarm 806 Port 1 Abnormal Station Code Exceeded Alarm Cleared 807 Port 1 Control Mode Idle Exceeded Alarm 808 Port 1 Control Mode Idle Exceeded Alarm Cleared 809 Port 1 Mux Out Of Sync Exceeded Alarm 810 Port 1 Mux Out Of Sync Exceeded Alarm Cleared 811 Port 1 Unassigned Mux Channel Exceeded Alarm 812 Port 1 Unassigned Mux Channel Alarm Cleared 813 Port 1 MJU Alert Exceeded Alarm 814 Port 1 MJU Alert Exceeded Alarm Cleared 815 Port 1 Test Code Exceeded Alarm 816 Port 1 Test Code Exceeded Alarm Cleared 817 Test Alert TA Port 1 818 Test Alert TA Port 1 Cleared Table continued on the next page 819 Port 1 Block Exceeded Alarm 820 Port 1 Block Exceeded Alarm Cleared 821 Port 1 Release Exceeded Alarm 822 Port 1 Release Exceeded Alarm Cleared 823 Port 1 Looped Alarm 824 Port 1 Loop cleared 825 Far Port 1 looped Alarm 826 Far Port 1 loop cleared 827 Port 1 Test Signal Alarm 828 Port 1 Test Signal Cleared 829 Port 2 Abnormal Station Code Exceeded Alarm 830 Port 2 Abnormal Station Code Exceeded Alarm Cleared 831 Port 2 Control Mode Idle Exceeded Alarm 832 Port 2 Control Mode Idle Exceeded Alarm Cleared 833 Port 2 Mux Out Of Sync Exceeded Alarm 834 Port 2 Mux Out Of Sync Exceeded Alarm Cleared 835 Port 2 Unassigned Mux C
3. d Port 1 Port 2 Statistics 56K 56K FW HW Rev 1 6 0 8 N N N N Battery nur OK ST ST DTE Intf V 35 V 35 NONE NONE Data bus aa NONE YES YES Tp test and monitor BEC OFF OFF Pp monitor leads and status ON OFF A Alarm Enable YES The CSU command assigns the DIU 2130 module to the CSU it will use Sincethe SCC 2020 contains a TAC 2010 CSU module it will be used for the CSU in this example TypeC and press ENTER At the enter shelf gt prompt type 1 and at the enter slot gt prompt type 1 again This selects the SCC 2020 in slot 1 of shelf 1 as the CSU for this DIU 2130 module The Timing Source defaults to CSU meaning that the DIU 2130 will derive its transmit clock from the source selected in the CSU configuration recovered network clock in this example This is correct for this example The DSO timeslot selection prompt appears as an uppercase D with a lowercase p The lowercase p is a variable Instead of typing p use a port number 1 or 2 For this example timeslots 1 through 12 are to be used on Data Port 1 and timeslots 13 through 24 are to be assigned to Data Port 2 Type D1 and press ENTER At the prompt enter port 1 channels gt type 1 12 and press ENTER This assigns timeslots 1 through 12 to Data Port 1 Now type D2 and press ENTER Verilink 3 5 DIU 2130 Configuration At the prompt enter port 2 channels gt type 13 24 and press ENTER This ass
4. Verilink 7 9 DIU DIM Details Figure 7 12 T1 Multiplexer CSU DSU Operation 7 10 Drop and Insert Mode NCC or TAC XMT DATA DATA gt EQPT td y DIU XMT CLOCK r Ti q XMT FRAMING AGGREGATE N DIU AND SIGNAL q RCV DATA k PROCESSING NETWORK a DIU RCV CLOCK CIRCUITS PATA lt gt q RCV FRAMING LLL L DIU DATA BUS A B or C on l SYSTEM SHELF BACK PLANE _XMT DATA ei DIU XMT CLOCK a XMT FRAMING DIU P RCV DATA a DIU RCV CLOCK DATA I gt RCV FRAMING EGPT P The CSU of an SCC NCC or TAC can also operate with DIUs in a drop and insert mode This allows the CSU to transmit a combination of voice VF and high speed data over the T1 network The CSU provides drop and insert toward either the network or the eguipment in a full duplex unidirectional transmission mode Toward Network Figure 7 13 shows a CSU drop and insert configuration toward the network The incoming signal from the customer s DS1 eguipment is applied to a multiplexer in the CSU The multiplexed data from the DIUs is also routed to this multiplexer over the data bus A on the shelf backplane This data occupies the DSO channel time slots assigned by the user to the DIUs The T1 aggregate signal is then applied by the multiplexer to the network Verilink Figure 7 13 Drop and Insert Towa
5. What To Do About Alarms Some alarms clear after the user configured timeout has expired Other alarms require corrective action If an alarm has been cleared no other action is required If there is a loopback present unless you are intentionally testing remove the loopback Only if the loopback is from your end If the loop was initiated by your network service provider check with their test facility before taking down the loop For an LOF you may have a telco or module problem To test do an RLB If there is no LOF indicated by the test the problem is with the telco For an LOS check your router cables power and ports For a power up self test failure reseat the module a few times to see if it will power up and pass the self test If it does not pass after repeated self tests replace the module Alarm Records Every alarm record that displays is active in the database until you do something about it Do the following with the alarm records Deactivating alarm records is a database management function As long as an alarm is active you can view it onscreen using the one of the management options on the ASCII interface AM2000 or Node Manager 2000 When you deactivate an alarm it s still in the database but not viewable on screen Deactivated alarms can be archived printed or deleted Archiving an alarm record stores it to a disk file you specify Printing an alarm record prints a copy of all active and
6. DIM 2035 u b eer odd ive e i 1 2 DIM 2449 u nn e de dee TH beine 1 2 DIM 2435 u a ans i ie Rt d bed t eee URP tates 1 3 DIM 2530 c e xtd ee De ern 1 3 CSU Interfaces c rer erre er E E Rte i iai ca 1 3 T1 Mux GSU DSW MOM Gis itii oue et e n dee nope ina da dede 1 3 Drop and Insert Mode ssssee meer 1 4 DIU Data BUSES iii e mete tht een tute e e RR ERU eiie 1 4 Transmit Side Functions ss 1 5 Data Receiver sisi TS 1 5 Serial FIFO BUFFE auta as ka saga eta ere eek 1 5 Interface Logic and Loopback Multiplexer lt 1 6 Pulse St ffing un kenne 1 6 Data Scrambler miii eet e s Ree Deer nn 1 6 Data Bus Interface Multiplexer and Driver oncccnnncccnnccccnncnncnnccnnnns 1 6 Test Signal Generator ss 1 6 Receive Side Functions is 1 6 Data Bus Interface Receiver and Demwultiplexer 1 6 Interface Logic and Loopback Multiplexer lt 1 6 Descrambler exei een 1 7 Serial FIFO Buffer ee else 1 7 bD CEPIPIAC EE 1 7 Specific Sii etia eiue DER ashe sted erp REID dee Raines ts 1 8 DIU 2130 Q ick Set up direct a eek 2 1 Installati n e RE S 2 1 Cables RM Area sente teens nai en teen A Ta i dea RE PART 2 1 Configuring the DIU 2130 disina aa kaka aaa aaa Aaaa Aaaa aa aaa aaa Aaaa aaa aaa 2 1 Configuration Memu c sectas ers 2 3 DIU 2130 Config tratlon ccs titi net ib eR E P Ert as ja borea sen 3 1 Configuration Options and Default Settings oooooccccnccccnnnciconnnnconnna
7. If you are testing a failed T1 circuit after the T1 Dial Backup Option has switched the data to the backup circuit you must first disable the automatic feature as described in Configuring Modes for Dial Backup on page 58 Otherwise the T1 Dial Backup Option can prematurely switch the data back to the failed line if it senses a continuously reliable test pattern When the T1 circuit is reinstated you can switch the T1 Dial Backup Option back to automatic Configuring the ConnecT 56K DSU for Dial Backup If you are using a Verilink ConnecT 56K DSU in your dial backup system you need to configure the ConnecT 56K DSU for use with the T1 Dial Backup Option For specific instructions and details see the ConnecT 56K DSU User Manual Follow these basic steps 1 Configure the unit for SW56 operation Use the 3 Config menu as described in Chapter 3 of the ConnecT 56K DSU User Manual See also Table A 1 Telephone company information in the aforementioned manual 2 Configurethe unit for DTR dialing This is also described in Chapter 3 of the ConnecT 56K DSU User Manual See especiallythe4 Dial Options section of that manual See also Table A 3 Configuration Profiles in the aforementioned manual 3 Program the unit with the number to dial if that dial backup mode is initiated Use the 4 Dial Options menu as described in Chapter 3 of the ConnecT 56K DSU User Manual Verilink E Chapter Application Example 56K NMS Option Over
8. Product Warranty Verilink s product warranty covers repair or replacement of all equipment under normal use for a five year period from date of shipment Replacement products may be new or reconditioned Any replaced or repaired product or part has a ninety 90 day warranty or the remainder of the initial warranty period whichever is longer Our in house Repair Center services returns within ten working days Customer Service Verilink offers the following services System Engineers at regional sales offices for network design and planning assistance 800 837 4546 Technical Assistance Center for free 24x7 telephone support during installation maintenance and troubleshooting 800 285 2755 and support verilink com Toreturn a product it must be assigned a Return Materials Authorization RMA number before sending it to Verilink for repair 800 926 0085 ext 2282 Maintenance contracts and leasing plans 800 837 4546 Technical Training on network concepts and Verilink products 800 282 2755 and training verilink com Web site www verilink com Publications Staff This manual was written and illustrated by David Gardner Contributing Writers and Editors Dave Fradelis Marie Metivier Steve Rider and Barbara Termaat Verilink DIU 2130 User Manual V vi Verilink DIU 2130 User Manual Table of Contents DIU 2130 DIU 2130 Overview rames Rh RR 1 1 DIU 2130 Front Module issues 1 2 Data Interface Modules ss 1 2
9. deactivated alarms Deleting an alarm record removes it from the database To delete an alarm first deactivate it Verilink 4 5 Troubleshooting 4 6 Verilink E Chapter T1 Dial Backup Option Overview The T1 Dial Backup Option automatically switches a failed T1 or fractional T1 FT1 to a usage measured dial up circuit if a dedicated T1 circuit or dedicated 56K circuit becomes unusable The dial backup circuit can be selected from the following alternatives Switched 56 SW56 SW56 is a switched carrier service providing 56 kbit s dial up lines It charges customers for data connection only when the interface unit is active Analog modem service Integrated Services Digital Network Basic Rate Interface ISDN BRI service The backed up circuit can ben x 56 or nx 64 kbit s The DIU 2130 DBU automatically reduces clock rates as necessary Figure 1 illustrates an application in which a circuit composed of a 56 kbit s circuit and a T1 circuit The circuit is backed up by a Verilink AS2000 at a central site and by a 56K Dial Backup Unit at the far end Figure 1 Example Application of the T1 Dial Backup Option in an AS2000 Node AM2000 Dedicated 56 kbit s SW56 56 kbit s DBU 56 kbit s V 35 Node Controller and Channel Service Unit ConnecT 56K DSU This T1 Dial Backup Option is an EPROM upgrade or download upgrade to the Verilink Data Interface Unit DIU 2130 plug in mo
10. gt This indicates that the DIU 2130 has been selected Type C and press ENTER to select the DIU 2130 configuration menu NOTE Whenever the word UPDATE appears in the command line prompt it indicates that some information has changed since the screen was last refreshed To refresh the screen with current information press ENTER by itself There is a brief delay as the SCC module tries to communicate with a CSU module in Shelf 0 Slot O since this is the default value for CSU assignment in a new DIU 2130 module An address of Shelf 0 Slot O is not a valid address Modules are shipped this way however so that they may be added to a shelf without interfering with any existing applications An error message displays No response from csu 0 0 The error message in this case means that the DIU 2130 is new and has never been assigned to any CSU module in any slot of any shelf Ignore this error message Then the DIU 2130 Configuration Diagnostic Menu displays Verilink DIU 2130 Configuration Figure 3 2 DIU 2130 Configuration Menu DIU 2130 C CSU T timing source chnl 01 02 03 04 Dp port Lead Toggles Forced Ports Mp mode Sp scram hdlc inv Kp clocking Gp LOS lead Ep enable loop Np near loopback Fp far loopback 1 2 DIU 2130 gt CONFI GURATI ON DI AGNOSTI C MENU 0 0 CSU 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 DTR DSR RTS CTS DCD
11. which expects to receive DTR as an input from the DTE indicating it is present powered up and prepared to operate If the DTE does not assert DTR this option allows the DIU 2130 to behave as it would if DTR were asserted by the DTE This feature can be set independently for port 1 and or port 2 The user types DTR and gets this response force dtr handshake port s 1 1 2 2 3 both 4 none gt The display as shown in our example reflects DTR forced on port 1 and not on port 2 DSR Data Set Ready a control lead presented by the DCE Data Communications Equipment The Verilink DIU 2130 is DCE The DIU expects to receive DTR as an input from the DTE indicating it is present powered up and prepared to operate This option allows the DIU 2130 to assert DSR regardless of any DTE leads This feature can be set independently for port 1 and or port 2 The user types DSR and gets this response force dsr handshake port s 1 1 2 2 3 both 4 none gt The display shown reflects DSR forced on port 1 and not on port 2 3 8 Verilink DIU 2130 Configuration Command Options RTS Request To Send a control lead presented by the DTE Data Terminal Equipment to indicate that it has data that it would like to transmit The Verilink DIU 2130 is DCE Data Communications Equipment which expects to receive RTS as an input from the DTE Data Terminal Equipment Typically if RTS is not ass
12. 16 Verilink 7 13 DIU DIM Details In network timing DS1 data is timed through the CSU by a reference clock derived from the incoming signal from the network The network extracted transmit clocks also synchronize the DIUs to the CSU These clocks are applied to the DIUs via the assigned data bus Figure 7 15 Network Timing T1 Multiplexer Mode NCC or TAC gt TO FROM NETWORK DATA EQPT r gt DIU nl I XMT DAT RCV DATA DATABUSA B orC XMT CLOCK RCV CLOCK e Figure 7 16 Network Timing Drop and Insert Mode External Timing 7 14 v v y TO FROM OTHER DIUs NCC or TAC DS 1 EQPT FIFO 4 ALL ONEs A y A 3 FIFO xaz i PIE A xcz CLOCK XMT Data DATA EGPT Ea DIU RCV Data XMT Clock RCV Clock v Y TO FROM OTHER DIUs rr e my DATA BUS A In external timing the network and eguipment signals are timed through the CSU of an NCC or TAC by a customer furnished reference clock External timing can be provided directly to the CSU as described below In all external timing modes the receive DIU clock is always derived from the T1 signal to the CSU Verilink T1 Multiplexer Mode DIU DIM Details Figure 7
13. 3 Compatibility and Requirements sssssss emen 6 4 Upgrading to the 56K NMS Option ssseseemmmeemmemmenemhnennrn nnn 6 4 Preconfigured Option usines 6 4 viii Verilink DIU 2130 Download Upgrade tai sasas eh Gases a a sa 6 4 EPROM Upgrade een a 6 5 Installation c e guna 6 5 Configuring a 56K DDS Module sise 6 6 Status MONILOFING s a v an cod A E nn ER dt ARE ipn as a 6 8 Managing Alari S rar ee S a ai a aa i bahnen 6 11 Alarm Detection es side see a i cete deca id 6 11 Alarm Parameters auci i a a a a pi a i a i 6 11 Managing LO0 pDackS vicio a 6 14 LY pes Of LOOPDACKS u ee ee ae 6 14 V 54 L00pDack due een een 6 15 Verilink Proprietary In band Loopback seeeeeeeeeee 6 15 Local DTE Loopback rm nes 6 15 Remote RL Lead Loopback uunnseessssnennnnnnnnnnnnnnnnnnnnnnnnnn e 6 15 Loop back Mode Configuration Options lt kaka kaka aaa aaa 6 15 AM2000 Loopback Activity Menu eesesesnemmH memes 6 16 DDS Latching Loopbacks raea aai E a A n en nennen nnns 6 16 Sending Diagnostic Test Patterns anne 6 17 ASCII Interfaces nes en ii ai tud mes dows 6 18 Supervisory FUNCTIONS erria ee Pa e exe Reb BR ee Ee re EO RE VU d 6 19 DIU 2130 Configuration Diagnostic Menu Options 6 20 agus cxx 6 20 DIU DIM Details etie ie tei ee EXE a o a tae Re detre RR e eda ee 7 1
14. 511 and 2047 These test patterns can be locally enabled on both ends simultaneously without enabling loops in order to independently test the transmit and receive lines Both these test patterns are useful in DDS mode ASCII Interface Figure 9 illustrates the ASCII Craft Interface Configuration Screen for a DIU 2130 DDS 6 18 Verilink 56K NMS Option Overview Figure 9 ASCII Interface Configuration Screen for the 56K NMS Option DIU 2130 CONFIGURATION DIAGNOSTIC MENU S save config Q restore config X exit menu C CSU 1 1 T timing source CSU chnl 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Dp 01 02 Lead Toggles DTR DSR RTS CTS DCD Forced Ports Port 1 Port 2 Statistics Mp mode 56K DDS 56K FW HW Rev 1 0 0 8 Sp scram HDLC Inv OFF OFF ON OFF Battery OK Kp clocking sT sT DTE Intf Gp LOS lead NONE NONE Data bus A Ep enable loop YES YES Tp test and monitor BEC Np near loopback OFF OFF Pp monitor leads and status Fp far loopback OFF OFF A enable alarm reporting NOTE Any options on the Configuration Menu followed by a small p must be used in combination with the appropriate port number For example the Mp mode command must be entered as either M1 or M2 depending on which port is to be configured Su pervi sory S save config Save current DI U2130 configuration settings into the Functions master NCC node controller O rest
15. 56K NMS Option Overview If you purchased the EPROM upgrade you need to replace the existing EPROM in the appropriate DIU 2130 with the DDS EPROM NOTE Before installing or using the 56K NMS Option read the Verilink End user Software License Agreement Use AM2000 for installing and managing 56K circuits in a DDS network The following steps summarize these tasks 1 Install the release 3 2A of AM2000 if available and if you have not done so already If you do not have the current AM2000 software you can still download the firmware with earlier versions Identify the AS2000 DIU 2130 elements that require the 56K NMS Option if any and upgrade them according to the appropriate download or EPROM replacement procedures found towards the back of this document For new installations with preconfigured DIU 2130 DDS elements that already contain the 56K NMS Option skip to step 4 Download the 56K NMS Option as instructed in the following sections Re configure the existing node DIU for DDS operation This includes modifying the DDS alarm thresholds for the site and configuring the loopback parameters for diagnostics For new installations create the node before this step See the Access Manager 2000 User Manual Install the remote ConnecT 56K DSU s Assure the system wiring is properly terminated then begin initial testing by activating loop backs and generating various test patterns onto the network A cou
16. 64K provides greater throughput Use the M1 and M2 commands replacing the p with the appropriate port number to set both data ports to 64K per DSO The remaining options are correct for this example The T1 circuit and DTE should now be connected Once the CSU has been connected to the T1 circuit for at least fifteen minutes meaningful performance statistics will be available under the controller module s Performance Monitoring Menu See the appropriate controller module user manual for more information Verilink DIU 2130 Configuration Within 15 seconds of connecting the T1 circuit the NET LED on the front of the controller module should change from red to green If it does not the Diagnostics Menu of the controller module may be used for troubleshooting Configuration Menu Details The lowercase p shown in some prompts is a variable representing the port number Use the number 1 or the number 2 in place of the p depending on which port you want to configure Table 3 3 Configuration Menu Commands Command Options Save Configuration If a DIU 2130 is controlled through an NCC the Save Configuration option saves the DIU configuration to battery protected NVRAM in the NCC module If the DIU 2130 is controlled by an SCC the Save Configuration option will return an error message This function is not supported by the SCC Restore Config If a DIU 2130 is controlled through an NCC the Restore Conf
17. A each data port operates at 672 kbit s and therefore requires 12 channel time slots on the T1 network 672 kbit s 12 channels x 56 kbit s each for the proper transmission bandwidth The sum total of the bandwidths of the two data equipment ports cannot exceed 24 channels 1 344 Mbit s in this example Verilink 1 3 DIU 2130 Overview Figure 1 7 Typical DIU 2130 Configurations 1 4 A SINGLE DIU 2130 B MULTIPLE DIUs Drop and Insert Mode DIU Data Buses DATA BUS A B OR C ON SHELF BACKPLANE DATA XMT DATA gt EQ1 M DIU XMT CLOCK y 672 Kbit s lt XMT FRAMING SCC 2020 ou NGO 2020 TO FROM i BEY DATA e NETWORK D DIU RCV CLOCK TAC 2010 DATA e EQ2 gt la RCV FRAMING 672 Kbivs 4 ST XMT DATA I Eat PI DIU XMT CLOCK I 56 Kbit s XMT FRAMING SCC 2020 oui A Rov DATA t NGC 2020 TO FROM lt DIU RCV CLOCK a 1 NETWORK DATA P R 010 Ea gt a RCV FRAMING i 56 Kbit s XMT DATA DATA EQ1 gt a PIU XMTOLOCK 56 Kbit s a XMTFRAMING DIU 12 RCV DATA DIU RCV CLOCK DATA p EQ2 gt p RCV FRAMING 56 Kbit s For a typical CSU DSU configuration with multiple DIUs up to 12 DIU 2130s can be connected to an NCC SCC or TAC to accommodate up to 24 data ports Section B of Figure 1 7 In this example eac
18. DCE to DSU Data and Clock Timing Signals sese 7 2 Send AMINO eui tpe uoo svar greed poete Pledge et A ERAI ERR RR QUE 7 3 Network Loop Timing Sierre 7 5 Internal Timing pd eei Pr Pre e HE E a 7 6 External Timing Ruin 7 6 DIU 2130 Clear Channel Operation Requirements nn 7 7 Clear Channel T1 Line 4ussnnnnnnnennnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnn nennen 7 7 Carrier Requirements sis 7 8 Drop and Insert Mode nen 7 8 DIU Interface Operation uunzusssnssnnnannnnnnnnnannnnnnnnnnnnnnnnn mene nennen nnns 7 8 T1 MuxX Mode IEEE 7 8 Drop and Insert Mode sss eene 7 10 CSU Timing ei 7 13 I hrough TIMING sunt He t a EU nk ERR RE ERE 7 13 Loop Timing cepa 7 13 Network Timing rrt rer der dette initie ces 7 13 External Timing 4 Heer 7 14 T1 Multiplexer Mode ssesse enn anne 7 15 Data Equipment Timing sesses mene 7 15 Verilink DIU 2130 Verilink DIU 2130 E Chapter DIU 2130 Overview This manual describes the operations and functions of the DIU 2130 Data Service Unit and its associated rear connector modules Data Interface Modules DIMs of the AS2000 system The DIU 2130 provides way to transmit high speed data over the network It interfaces with two data ports operating at rates of 56 kbit s 64 kbit s or any multiple of either rate up to 1 344 or 1 536 Mbit s The DIU places these signals on the user assigned DSO channel time slots of the
19. can radiate radio freguency energy and if not installed and used in accordance with the user manual can cause harmful interference to radio communications There is no guarantee that interference will not occur in a particular installation If this equipment causes harmful interference to radio or television reception which can be determined by turning the equipment off and on try to correct the interference by one or more of the following measures Reorient or relocate the receiving antenna Increase the separation between the equipment and receiver Connect the equipment into an outlet on a circuit different from that to which the receiver is connected Consult the dealer or an experienced radio TV technician for help This equipment complies with Part 68 of the FCC Rules On the rear side or bottom of the unit is a label that contains the FCC registration number and other information If requested provide this information to the telephone company All direct connections to the network lines must be made using standard plugs and jacks compliant with Part 68 The following tables list the applicable registration jack universal order codes USOCS facility interface codes FICs and service order codes SOCs These are required to order service from the telco For T1 interfaces Port ID REN SOC FIC USOC 1 544 Mbit s SF 6 0N 04DU9 BN RJ 48C jack 1 544 Mbit s SF B8ZS 04DU9 DN 1 544 Mbit s ANSI ES
20. generated Error Counter When the port is generating a test pattern the received channelized data is verified against the data being transmitted If a mismatch occurs the data block is considered as having one or more bit errors and increments a counter This field is the current count of block errors detected by the DIU for that port DTE LOS A value of YES or NO indicating the presence of a DTE device connected to the DIU port The DIU uses the DTR or RTS signals found on the port connector to detect if a device Verilink 6 9 56K NMS Option Overview ASC Exceeded CMI Exceeded MOS Exceeded UMC Exceeded Received DDS Code is present The DIU must be configured properly in order to detect these signals See Upgrading to the 56K NMS Option Indicates that the configured threshold for Abnormal Station Code has been exceeded This field is available for ports configured for 56K DDS mode only Indicates that the configured threshold for Control Mode Idle has been exceeded This field is available for ports configured for 56K DDS mode only Indicates that the configured threshold for Mux Out Of Sync has been exceeded This field is available for ports configured for 56K DDS mode only Indicates that the configured threshold for Unassigned Mux Channel has been exceeded This field is available for ports configured for 56K DDS mode only Indicates the last received DDS code from the channelized data The following abbr
21. the firmware reverts to the original firmware in the EPROM Therefore a module upgraded by a firmware download is different from a preconfigured module or one in which the EPROM has been replaced If you purchased the EPROM upgrade replace the existing EPROM in the appropriate DIU 2130 with the upgrade EPROM Verilink T1 Dial Backup Option Overview Installation and Management NOTE Before installing or using the T1 Dial Backup Option read the Verilink End user Software License Agreement You can use AM2000 for installing the download upgrade and managing the T1 Dial Backup Option The AM2000 connects to the NCC plug in module Managing can include the following functions Detecting the presence of a T1 Dial Backup Option plug in module Configuring the T1 Dial Backup Option Selecting the appropriate dial backup automatic mode Tracking the status of the dial backup circuit Monitoring and setting dial backup alarm limits Testing the dial backup before or after a TI circuit failure For more information on AM2000 see the Access Manager 2000 User Manual Installation and management tasks are summarized as follows 1 Install the release 3 2A of AM2000 if available and if you have not done so already If you do not have the current AM2000 software you can still download the firmware with earlier versions Identify the AS2000 DIU 2130 elements that reguire the T1 Dial Backup Option and upgrade them accordin
22. used when B8ZS is not available If you assign DSO channels randomly such that two channels in a frame are never next to each other i e 1 4 6 and 9 then a clear channel T1 line is not required If you assign DSO channels such that two channels in a frame are next to each other i e 1 2 6 and 7 then a clear channel T1 line is required If you assign DSO channels contiguously in numeric sequence a clear channel T1 line is required at all data rates at 128 kbit s and above Include 64 kbit s if the adjacent channels are also used for 64 kbit s or if rates higher than 64 kbit s are required by the application Simply put for rates 2n x 64 B8ZS is required If you are connected to a DS1 channel bank using 64 kbit s data and configured for drop and insert all of the guidelines apply DIU Interface Operation T1 Mux Mode 7 8 The CSU of the NCC or TAC can operate with DIU 2130s for high speed customer data transmission over the T1 network The CSU provides this data service in either a T1 multiplexer mode or a drop and insert mode Figure 7 12 shows how the CSU of an SCC NCC or TAC interfaces with one or more DIUs in a T1 multiplexer mode In the transmit direction toward the network each DIU multiplexes the incoming data from the customer data equipment It places the data in the Verilink DIU DIM Details appropriate DSO channel time slots of the backplane DIU data bus assigned to the CSU In the
23. value of CSU c DIU may then be selected as the timing source for the CSU This option is not recommended except when using mux mode Verilink 3 17 DIU 2130 Configuration 3 18 Verilink E Chapter Near End Loop LED Far End Loop LED STAT LED Troubleshooting Controller card s poll the various modules for alarms If alarm reporting is enabled for the node and for the module s the node controller card retrieves and sends the alarm to Access Manager 2000 Node Manager 2000 or an SNMP agent An alarm list is provided under the alarms displays of the various options of AM2000 NM2000 SNMP or the Craft interface Alarms can also be automatically sent to a specified printer by setting up the printer address in the various management utilities menus The Near End Loop LED lights amber when the associated data port is looped on the DIU The Far End Loop LED lights amber when the associated data port is looped at the far end DIU This occurs only if theloop up command was sent by the near end DIU to the far end DIU over the T1 circuit The STAT DIU 2130 status LED is a tri color indicator which shows one of the following conditions for each data port Green for 6 Seconds then 2 Flashes of Red repeated This indicates that there is a loss of signal on the data port Green for 6 Seconds then 3 Flashes of Red repeated This indicates that the DIU 2130 has a low battery This alarm will only be displa
24. 17 shows an external timing application when the CSU is in the T1 multiplexer mode The external clock is applied directly to the NCC or TAC This clock is a stable 1 544 MHz signal in an RS 422 or TTL format NOTE The external clock must meet the input frequency jitter and wander requirements of a DS1 signal as per AT amp T PUB 62411 Figure 7 17 External Timing T1 Multiplexer Mode Data Equipment Timing NCC or TAC EXTERNAL gt REFERENCE ESA ME TTL CLOCK CLOCK TO FROM RECEIVE NETWORK CLOCK N mm DATA BUS A B or C p XMT DATA 4 para a RCV DATA 4 Et DIU XMT CLOCK e RCV CLOCK 4 vv v TO FROM OTHER DIUs In data equipment timing the clock source is the TT Terminal Timing signal applied from a data equipment device in a DTE configuration to a DIU 2130 Figure 7 18 shows data equipment timing for the CSU T1 multiplexer mode of operation Data Bus A or B conveys the data between the DIUs and CSU and Data Bus C conveys the TT signal Verilink 7 15 DIU DIM Details Figure 7 18 Data Equipment Timing T1 Multiplexer Mode NCC OR TAC RECEIVE TO FROM CLOCK NETWORK TRANSMIT CLOCK A DATABUSAORB XMT DATA gt gt RCV DATA 4 DATA DATA DIU RCV CLOCK BUS C EG 2130 M XMT CLOCK TT m gt XMT TIMIN
25. 2 23 24 01 01 01 01 01 01 01 01 02 02 02 02 02 02 02 02 02 02 02 02 DTR DSR RTS CTS DCD Port 1 Port 2 Statistics 56K 56K FW HW Rev 1 6 0 8 N N N N Bat ter Vs oves OK ST ST DTE NER rn nm od aa V 35 V 35 NONE NONE Data bus A YES YES Tp test and monitor BEC OFF OFF Pp monitor leads and status ON OFF A Alarm Enable YES 2 4 Lead toggles are used to determine whether the control leads on the synchronous serial interface will function in the normal way or be forced on When the DTE does not assert control leads they can Verilink DIU 2130 Quick Set up be forced on by typing the three letter abbreviation of the control lead For this example the DTE supports normal control lead operation and the default values are appropriate Mode is used to determine the data rate of each of the timeslots assigned to the port For an AMI T1 circuit the mode must be 56K For the B8ZS T1 used in this example 64K provides greater throughput Use the M1 and M2 commands replacing the p with the appropriate port number to set both data ports to 64K per DSO The remaining options are correct for this example The T1 circuit and DTE should now be connected Once the CSU has been connected to the T1 circuit for at least fifteen minutes meaningful performance statistics will be available under the controller module s Performance Monitoring Menu See the appropriate controller module
26. 3 0 port will activate its bidirectional loopback Choices include DSU e OCU e V 54 Channel Select loop type on RL lead Verilink 6 15 56K NMS Option Overview This field selects which loop code to send in the channelized data to the remote end when the RL lead on the DTE connector interface module is forced high Various loop code types include V 54 Most useful in DDS mode FT1 Used for fractional T1 Verilink Not useful in DDS mode AM2000 Figure 5 is a AM2000 screen display of the loopback selections Loopback available in AM2000 Activity Menu Figure 5 AM2000 Display of the Select DIU 2130 DDS Loopback Activity There are sub menus for DDS latching loopback menu selections DDS Latching Once this loopback is started it remains in effect until released by Loopbacks another specific code sequence This eliminates most restrictions on the test data that can be transmitted NOTE The DIU 2130 must be optioned for the 56K NMS Option for latching loopbacks to work When you select the DDS latching loopback the screen in Figure 6 appears The possible choices are 6 16 Verilink 56K NMS Option Overview Figure 6 Choices for Latching loop backs Channel The DDS code S 0 101000 is placed in the channelized data DSU The DDS code 80101 1 0 Ois placed in the channelized data OCU The DDS code S 01010 1 Ois placed in the channelized data Sending Diagnostic Test Patterns Once the loop is establis
27. 5 Cable Interconnect Part Numbers 15 Foot 50 Foot DTE to DCE 458 501775 015 458 501775 050 DCE to DCE 458 501776 015 458 501776 050 Figure 4 shows the pin to pin diagram for the two cable connections 5 6 Verilink T1 Dial Backup Option Overview Figure 4 Cable Interconnect Schematic when the Backup Circuit is Activated DIU 2 130 DBU ConnecT DTE Port 1 Port 2 56K DSU SCR SCR SCTE SCT SCT RLSD RTS RLSD is equivalent to Carrier Detect CD Detecting a Using the AM2000 you can detect the presence of a DIU 2130 DBU DIU 2130 DBU DIU 2130 with the T1 Dial Backup Option by displaying the node configuration from the Online Access Display or the AS2000 Configuration menus Figure5 Display Node Configuration Showing the DIU 2130 DBU Element vol Verilink 5 7 T1 Dial Backup Option Overview Configuring Modes for Dial Backup The AM2000 display for configuring the T1 Dial Backup Option operation is shown in Figure 6 Figure 6 Configuration Screen for Dial Backup Mode The Port 1 Backup Restore Mode line selection allows you to select dial backup mode Port 2 is always the backup port Pressing F8 steps through the available modes as follows AUTOMATIC AUTOMATIC Port 1 is connected to port 2 upon one of the following conditions 1 Abnormal Station Code ASC is detected within the channel data 2 Loss of Frame LOF occurs on the T1 Signal 3 T
28. CD signals to the data equipment as previously described for the CSU T1 multiplexer mode of operation In the opposite direction the near end CSU sends the incoming VF on channels 1 through 12 from the channel bank to the network It also continues inserting normal DIU data into channels 13 through 24 and sends an RAI to the network if the network is ESF framed The far end CSU responds by sending the incoming VF from the network to the channel bank via channels 1 through 12 It also sends all ones idle bytes on the drop and insert channels 13 through 24 to the channel bank for channel conditioning The far end CSU also drops off the incoming data on channels 13 through 24 from the network to the DIUs In addition it continues sending VF from the channel bank to the network on channels 1 through 12 along with DIU data on the remaining channels Each far end DIU also performs the channel conditioning operations previously described for the CSU T1 multiplexer mode NOTE If the CSU is programmed for SF framing it neither generates nor responds to a received RAI Therefore channel conditioning will not occur at the far end CSU and DIUs LOF Detection from the Equipment Figure 7 20 shows LOF processing when a CSU in the drop and insert mode detects an LOF from the equipment and is programmed for ESF framing on the network If the drop and insert is toward the network Figure 7 20 the CSU continues inserting DIU data into chan
29. D SD p TIXMT Customer Equipment bce DTE g BD A T1 RCV 7 2 Verilink DIU DIM Details The SD and RD signals have associated clock signals called Terminal Timing TT and Receive Timing RT The DIU s input buffer may use the TT signal to clock in SD The customer s DTE receive buffer uses the RT signal to clock in RD Figure 7 4 Figure 7 4 Terminal Timing TT and Receive Timing RT Customer Equipment DSU TE DCE L 5 S hi end Ti XMT TT Qo EME T RCV Buffer lt RD T1 RCV A RT lt The RT signal is derived by recovering the clock from the data stream coming from the network Since the T1 data contains overhead bits that are removed before being sent to the DTE the frequency of this data is different than the frequency of RD In the receive direction the frequency is decreased from 1 544 Mbit s to the selected interface frequency In the transmit direction the frequency is increased from the selected interface frequency to 1 544 Mbit s Figure 7 5 Figure 7 5 Receive Clock Recovery Send Timing Customer Equipment DSU DTE DCE o o Input Buffer L pTi XMT TT 2 Receive RD Clock Buffer 2 4 Recovery Ti RCV RT Send Timing ST is used to control the rate at which the DTE presents transmit data Send Timing ST is also sent by the DIU to t
30. DIM or rear connector modules connects the DIU 2130 to the customer data equipment cables Each DIM plugs into the rear of a multiline or dual line shelf and mates with the associated DIU 2130 DIM 2035 The Data Interface Module DIM 2035 provides Dual 2 V 35 connectors 34 pin Winchester type for connecting either Data Terminal Equipment DTE or Data Control Equipment DCE Figure 1 3 DIM 2035 V 35 o So oo gt o oo o Oo A 10 Seo 18 39 Of Jo OP gt lo a DIM 2449 The Data Interface Module DIM 2449 provides e Dual 2 RS 449 422 connectors DB 37 for connecting either DTE or DCE Figure 1 4 DIM 2449 RS 449 RS 422 o o No ES 1 2 Verilink DIM 2435 DIM 2530 CSU Interfaces T1 Mux CSU DSU Mode DIU 2130 Overview The Data Interface Module DIM 2435 provides One 1 V 35 connector 34 pin Winchester type for connecting either DTE or DCE to the DIU 2130 One 1 RS 449 422 connector DB 37 for connecting either DTE or DCE Figure 1 5 DIM 2435 V 35 RS 449 o ooo O So o o S we Ol 222219 as The Data Interface Module DIM 2530 provides Dual 2 EIA 530 connectors DB 25 for connecting either DTE or DCE Figure 1 6 DIM 2530 EIA 530 o NOTE When connecting DCE to a DIU 2130 a cross over cable must be used In a typical single DIU configuration Fig 1 4
31. DS1 signal It then sends the channelized data to a CSU NCC SCC TAC or with an NCM a DIDCSU where the data is multiplexed onto the T1 line for network transmission In the opposite direction of transmission the DIU 2130 receives the incoming network signal from the CSU and passes the data to the Data Terminating Equipment Figure 1 1 Typical DIU 2130 Application T1 NETWORK TO FAR END Z NCCORTAC AND DIU 2130 NCC pij OR 2130 TAC CUSTOMER _ PORT 1 PORT2 CUSTOMER DATAEQ DATA EQ Up to twelve DIUs and one NCC 2020 SCC 2020 or TAC 2010 provide carrier network access and T1 transmission for high speed data applications If using the DIU 2130 DBU option at one timeslot per Port 1 then it is possible to get up to 24 DIUs per CSU module The DIU interfaces with the associated CSU through a data bus on the shelf backplane DIU 2130 T1 Dial Backup DBU Option DIU 2130 56K Network Management System NMS Option DDS Verilink 1 1 DIU 2130 Overview DIU 2130 Front Module The DIU 2130 front panel Figure 1 2 has three LEDs for each customer data port Figure 1 2 DIU 2130 Front Panel Data Port 1 Data Port 2 Loopback and Loopback and Status LEDs Status LEDs a o Es a o E o O x S G x DIU S S 5 Date S S de 2130 DATA pri O O O Port O O O NEAR FAR NEAR FAR END END END END Data Interface Modules One of four Data Interface Modules
32. F 04DU9 1KN 1 544 Mbit s ANSI ESF B8ZS 04DU9 1SN For DDS interfaces Port ID REN SOC FIC USOC 56 kbit s 6 0N 04DU5 56 RJ 48S jack 64 kbit s 04DU5 64 If the unit appears to be malfunctioning inform the telco and disconnect it from the network lines until the source of trouble is determined to be your equipment or thetelephone line If your equipment needs repair it should not be reconnected until it is repaired The unit has been designed to prevent harm to the network If the telephone company finds that the equipment is exceeding tolerable parameters it can temporarily disconnect service In this case the telephone company will provide you advance notice if possible Verilink DIU 2130 User Manual Lithium Battery English Francais Espa ole If the telephone company alters its equipment in a manner that can affect the use of this device it must give you warning so that you have the opportunity to maintain uninterrupted service You will be advised of your righttofile a complaint with the FCC No customer is authorized to repair this equipment regardless of warranty status All repairs must be performed by Verilink or an authorized agent It is the responsibility of users requiring service to report the need for service to Verilink or to one of our authorized agents The lithium battery referred to in the following notices is contained inside the clock chip DANGER The battery can explode if inc
33. G TT v v Y TO FROM OTHER DIUs Figure 7 19 shows alarm processing when LOF is detected from the network and CSU drop and insert is toward the network The LOF detecting CSU sends all ones on channels 1 through 12 toward the DS1 channel bank for channel conditioning Figure 7 19 Drop and Insert LOF RAI Processing Detection from the Network Drop and insert towrd Network EGPT VF ch 1 12 VF ch 1 12 Insert DIU data ch 13 ALL ONEs ch 24 RAI 13 24 gt CSU RAI CSU DS 1 ui gt gt DS CHAN YFon NETWORK VF on CHAN BANK ch 1 12 ch 1 12 BANK e 7 14 x 4 LOF 4 A ONES ch EQPT VF 12 Insert DIU data INSERT DROP L gt DATA DATA DIU DIU EQPT DROP S s INSERT EGPT ch 13 24 ch 13 24 gt Channel conditioning negate CTS DSR Channel conditioning negate CTS and DSR and DCD send ALL ONEs to data send ALL ONEs to data equipment equipment Note 2 Note 2 NOTES 1 In the SF mode the CSU neither generates nor responds to a received Yellow Alarm Therefore far end channel conditioning does not occur with SF framing 7 16 Verilink DIU DIM Details The associated DIUs also perform channel conditioning by sending all ones idle bytes to the connecting customer data equipment Each DIU also negates the CTS DSR and D
34. IU 2130 module An address of Shelf 0 Slot O is not a valid address Modules are shipped this way however so that they may be added to a shelf without interfering with any existing applications An error message displays No response from csu 0 0 The error message in this case means that the DIU 2130 is new and has never been assigned to any CSU module in any slot of any shelf Ignore this error message Then the DIU 2130 Configuration Diagnostic Menu displays Figure 2 2 DIU 2130 Configuration Menu DIU 2130 C CSU T timing source chnl 01 02 03 04 Dp port Lead Toggles Forced Ports Mp mode Sp scram hdlc inv Kp clocking Gp LOS lead Ep enable loop Np near loopback Fp far loopback 1 2 DIU 2130 gt CONFI GURATI ON DI AGNOSTI C MENU 0 0 CSU 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 DTR DSR RTS CTS DCD d Port 1 Port 2 Statistics 56K 56K FW HW Rev 1 6 0 8 N N N N Battery ai ai aaa es OK ST ST DTE Intf V 35 V 35 NONE NONE Data bus NONE YES YES Tp test and monitor BEC OFF OFF Pp monitor leads and status ON OFF A Alarm Enable YES The CSU command assigns the DIU 2130 module to the CSU it will use Sincethe SCC 2020 contains a TAC 2010 CSU module it will be used for the CSU in this example Type C and press ENTER At the enter shelf gt prompt type 1 and at the enter s
35. Overview OR 2 ASC is received continuously for 5 seconds by the DIU 2130 DBU from the far end Office Channel Unit Data Processor OCU DP when a far end 56 kbit s DSU circuit fails Upgrading to the T1 Dial Backup Option Preconfigured Option Download Upgrade EPROM Upgrade 5 4 This section describes how to install your option depending on which of the available configurations you have This section also describes how you configure your T1 Dial Backup Option for operation and management NOTE To make use of the option you need AM2000 Release 3 2A or higher Preferably you should have the current AM2000 installed before you begin a firmware download of the option However if you do not you can still download the firmware upgrade using an earlier version of AM2000 If you purchased a preconfigured DIU 2130 DBU its EPROM already contains the T1 Dial Backup Option All you need do is to install the plug in module and ConnecT 56K DSU s Then configure the element as directed in the section Overview of Installation and Management Tasks If you purchased the downloadable software you can download the T1 Dial Backup Option into an existing DIU 2130 using AM2000 See Configuring the ConnecT 56K DSU for Dial Backup NOTE When you download a firmware upgrade to an existing module the upgrade is loaded into the battery backup RAM and not into the EPROM proper If you disconnect the battery in such a module
36. Verilink DIU 2130 User Manual October 1999 P N 880 503297 001 B VERILINK Copyright Notice Trademarks FCC Requirements Copyright 1999 Verilink Corporation All rights reserved This document does not create any express or implied warranty about Verilink or about its products or services Verilink s sole warranty is contained in its product warranty The end user documentation is shipped with Verilink s products and constitutes the sole specifications referred to in the product warranty Verilink has made reasonable efforts to verify that the information contained herein is accurate but Verilink assumes no responsibility for its use or for any infringement of patents or other rights of third parties that may result The customer is solely responsible for verifying the suitability of Verilink s products for its use Specifications are subject to change without notice Verilink is a registered trademark of Verilink Corporation Access System 2000 WANscope VeriStats and FrameStart are trademarks of Verilink Corporation Any named products herein are trademarks of their respective companies This eguipment has been tested and found to comply within the limits for a Class A digital device pursuant to Part 15 of the Federal Communications Commission FCC rules These limits are designed to provide protection against harmful interference in a commercial environment This eguipment generates uses and
37. Y N Port 1 Force DSR No Y N Port 1 Force CTS No Y N Port 1 Force DCD No Y N Port 1 Detect DTE LOS No No RTS DTR Port 1 Enable as TIU No Y N Monitoring Dial Backup Status Using the AM2000 you can check in what state the DIU 2130 DBU element is currently operating by selecting DIU 2130 DBU from the Online Access Status Element menu The DIU 2130 DBU Status window shown in Figure 7 appears Notice the option Active Path which indicates whether Port 2 is currently active Verilink 5 9 T1 Dial Backup Option Overview Figure 7 Status Display Screen for DIU213 0 DBU li Under Port 1 one of the following codes can result ACTIVE ASC LOF CD USER No errors are detected and the port is operating normally The port switched due to an Abnormal Station Code on Port 1 The port switched due to Loss Of Frame The port switched due to Carrier Detect received from the backup circuit DCE The port switched due to user command Under Port 2 one of the following codes may result STANDBY ACTIVE ERROR Managing Alarms and Testing The backup circuit is currently not being used Errors detected on Port 1 or by user command caused the backup circuit to become active The backup criteria was met but an attempt to establish the backup circuit failed Managing Dial Table 2 lists the possible alarms that can occur during the Backup Alarms DIU 2130 DBU operation Verilink Manuall
38. al at 5 Vac Power Dissipation 2 5W 8 4 BTU nominal Environmental Operating Temperature 32 F 0 C to 122 F 50 C Humidity 95 non condensing Dimensions Height 8 05 in 20 45 cm Depth 8 04 in 20 42 cm Width 0 96 in 2 44 cm Table 1 3 Data Interface Modules DIMs Rear Connector Module Dimensions DIM 2035 8 44 in 21 4 cm high x 2 93 in 7 44 cm deep x 0 96 in 2 5 cm wide DIM 2449 8 44 in 21 4 cm high x 2 75 in 7 0 cm deep x 0 96 in 2 5 cm wide DIM 2530 8 44 in 21 4 cm high x 2 75 in 7 cm deep x 0 96 in 2 5 cm wide DIM 2435 8 44 in 21 4 cm high x 2 93 in 7 4 cm deep x 0 96 in 2 5 cm wide 1 8 Verilink E Chapter Installation Cables Configuring the DIU 2130 DIU 2130 Quick Set up Before installing each DIU 2130 and associated DIM the shelves power controller cards NCC SCC or NCM and CSUs NCC SCC DIDCSU or TAC 2010s must be installed The Access System 2000 allows installation of a DIU 2130 and DIM in any shelf slot except Slot 1 in Shelf 1 of each node this slot is reserved for the node controller The DIU 2130 is always a DCE device The external customer data equipment can be either DCE or DTE Do the following before installing the DIU Install all associated Access System 2000 shelves and power supplies as outlined in the AS2000 The Basics manual Install and test the CSUs Be sure all CSU
39. ansmitted data can have no more than 15 zeros in a row On a clear channel T1 line the transmitted data can contain unrestricted zeros density any number of ones and zeros in any combination A clear channel T1 lineis achieved by using B8ZS Binary Eight Zeros Substitution before transmitting the data to the public telephone network and decoding it at the other end The NCC 2020 or TAC 2010 CSU does this encoding and decoding The option is set using Node Manager Access Manager 2000 some other management software the Craft interface or the master NCC SCC thumbwheel switch Verilink 7 7 DIU DIM Details _ Carrier Requirements Drop and Insert Mode Contact the T1 line provider telco and verify that the network will support the B8ZS encoding scheme Clear channel operation and data equipment rates When using a DIU 2130 the requirement for a clear channel T1 line depends upon the data equipment transmission that will be used The following guidelines apply 1 If you have selected a data rate of 56 kbit s or a multiple of 56 kbit s the DIU 2130 can operate at any data rate up to and including 1 344 Mbit s without a clear channel T1 line 2 If you have selected a data rate that is a multiple of 64 kbit s the following guidelines apply If you assign alternate DSO channels i e odd numbered or even numbered channels only the DIU 2130 can operate at any data rate up to and including 768 kbit s This mode is
40. arrier From DIU Forced On Factory Default CF Detect normal mode of operation See Note 3 Note 1 If the CSU goes into an LOF orreceives a yellow RAI alarm CTS is turned off if this handshaking option is not forced on Note 2 If the CSU goes into an LOF or receives a yellow RAI alarm DSR is turned off if this handshaking option is not forced on Note 3 If the CSU goes into an LOF alarm condition DCD is turned off if this handshaking option is not forced on 3 2 Verilink DIU 2130 Configuration Verilink DIU 2130 Configuration Diagnostics Configuring the DIU 2130 The letter D is used on the Shelf Slot map of the Top or Main Menu of the controller module to represent a DIU 2130 DSU The DIU 2130 must be used in conjunction with a CSU module NCC 2020 SCC 2020 TAC 2010 or with an NCM 2000 a DIDCSU Each DIU 2130 supports one or two data ports By selecting from various rear interface cards different synchronous serial interfaces may be supported Up to 24 DIU 2130 modules may be associated with a single CSU allowing the custom design of a data channel bank For this example an SCC 2020 is used with a DIU 2130 module in the right side slot 2 of a Dual Line Shelf The SCC 2020 connects directly to the T1 circuit and provides CSU functionality The DIU 2130 presents two synchronous serial interfaces for connecting the Data Terminal Eguipment DTE and provides DSU functions Before an
41. ated and the receive data is monitored for errors The pattern being sent should be received unaltered indicating a good path to the point of loopback To run a test and monitor results on port 1 enter T1 To run a test and monitor results on port 2 enter T2 A display appears like Verilink 3 13 DIU 2130 Configuration Near Loop Monitor Leads Far Loop Port 1 Block Error Count 0 STOP gt If the data pattern being sent is received with no errors the Block Error Count BEC will remain at zero For any block in which a single bit error occurs the number will increment During a good test the STAT LED on the DIU for the port in test will be lit solid amber If errors occur that LED will flash red to green To end the test just press the ENTER key Be sure to also end whatever loop may have been used Use N1 to turn Near End loopback on or off for port 1 Use N2 to turn Near End loopback on or off for port 2 The Near End loop is also called a DTE loop it is a loopback test that takes place in the DIU and is bidirectional On the DIU the Near End Loop LED will come on for the port which is in loopback Selecting P1 for port 1 or P2 for port 2 produces output like TXD RXD DTR DSR RTSCTSDCDLL RL TM LOS Port 1 NO YES ON ON ON ON ON OFF OFF OFF NO STOP gt This display continues to update until the user presses the Enter key Shown are various interface leads and their current status A series of snapshots ar
42. cs Data Bus Enable Loop Test Monitor DIU 2130 Configuration Use G1 to select the LOS lead for port 1 Use G2 to select for port 2 On the right side of the screen some information appears Statistics FW HW Rev 1 2 0 8 Battery OK DTE Intf V 35 V 35 Data bus A The field under Statistics which shows the Data Bus is informational only in the sense it is not directly a menu prompt but it is critical This shows which of the three shelf backplane busses the CSU is using One does not set this option in the DIU instead the CSU is optioned for some data bus if it is to be used with a DIU and then the DIU is optioned for which CSU it is to operate with Once the DIU is assigned to some CSU it polls the CSU to get the bus assignment This option determines whether a local or remote user will be able to establish a loop on the given port of this DIU If loop is enabled then when the DIU receives a loop up code from a far end device it will go into the bidirectional DTE loop mode If loop is disabled then when the DIU receives a loop up code from a far end device it will not go into any loop mode In most cases this should be enabled for any port being used The Test and Monitor Block Error Counter function is used after a loopback has already been established The loop might be in the local CSU the network itself or the far end DIU When T1 or T2 is selected a test pattern is sent from the port indic
43. d loopback 6 14 Verilink V 54 Loopback Verilink Proprietary In band Loopback Local DTE Loopback Remote RL Lead Loopback Loop back Mode Configuration Options 56K NMS Option Overview This loopback meets the T1 403 standard which is similar to the CCITT V 54 standard It uses the same polynomial as the V 54 loopback to generate the loop up and loop down codes es 1 x x Verilink proprietary in band loopback is not useful in DDS mode This loopback includes the following loop down Inverted 1 in 3 loop up Inverted 1 in 5 The local DTE loopback is supported in ASCII user interface and AM2000 It can be activated enabled by the ASCII user interface AM2000 or the LL lead This loopback is bidirectional You can activate enable a remote loopback by the ASCII user interface AM2000 or the RL lead This loopback is bidirectional Several parameters can be specified for the operation of loop backs These parameters are located in the AM2000 DDS Loop Options screen See Figure 4 You can display them by pressing the F8 key when the cursor is in the Loop field in the DIU 2130 configuration screen See Figure 2 The DDS Loop Options screen is used to configure the loopback options Each port can be configured independently The following fields are available Figure 4 AM2000 Example Display of Available DDS Loopback Definition Options Loop on received DDS code Selects the DDS code on which the DIU21
44. data equipment In the opposite direction the CSU sends channels 1 through 12 of the incoming network signal to the equipment It also continues inserting data from the DIUs into channels 13 through 24 and sends this data to the equipment NOTE In LOF and RAI processing with DIUS if the CSU is programmed for SF framing it neither generates nor responds to a received RAI Therefore channel conditioning will not occur at the far end CSU and DIUs Verilink Index A DIU interface with 7 8 Network timing 7 13 alarm buffers 9 displaying 4 4 T C T1 clear channel line DIU 2130 7 7 TAC 2010 clear channel operation requirements 7 7 A CSU timing 7 13 clear channel T1 line DIU 2130 7 7 DIU interface with 7 8 clocking signals DIU 2130 receive clock recovery 7 3 V send data and receive data 7 3 terminal timing and receive timing 7 3 V 54 data channel loopbacks 4 3 D data bus interface 1 6 data interface modules DIMs 1 2 displaying alarm buffers 4 4 DIU 2130 clear channel operation reguirements 7 7 CSU interface 7 8 CSU interfaces 1 3 V 54 compatable data channel loopbacks 4 3 DIU data buses 1 4 DIU receive functions 1 6 data driver 1 7 descrambler 1 7 FIFO buffer 1 7 test signal detector 4 2 DIU transmit functions 1 6 data receiver 1 5 data scrambler 1 6 FIFO buffer 1 5 pulse stuffing 1 6 test signal generator 1 6 Drop and insert operation toward network 7 10 interface logic and l
45. die in den Ger ten zusammengeschaltet sind m ssen weiterhin den Vorschriften EN60950 1992 A4 1997 Absatz 6 2 f r Telecommunications Netz Spannung TNV Schaltkreize entsprechen This digital apparatus does not exceed the Class A limits for radio noise emissions from digital apparatus set out in the Radio Interference Regulations of the Canadian Department of Communications Le pr sent appareil num rique n met pas de bruits radio lectriques d passant les limites applicables aux appareils num riques de la class A prescrites dans le R glement sur le brouillage radio lectrique dict par le minist re des Communications du Canada The Industry Canada label indentifies CS 03 certified equipment This certification means that the equipment meets certain telecommunications network protective operational and safety requirements Industry Canada does not guarantee the equipment will operate to the user s satisfaction Before installing this equipment users should ensure that it is permissibleto be connected to the facilities of the local telecommunications company The equipment must also be installed using an acceptable method of connection In some cases the company s inside wiring associated with a single line individual service may be extended by means of a certified connector assembly telephone extension cord The customer should be aware that compliance with the above conditions may not prevent degradation of service in some si
46. dity Off Off Valid On Off Invalid Off On Invalid On On Valid Serial FIFO Buffer The receive side FIFO buffer has the same function as the FIFO buffer on the transmit side Data Driver The data driver converts the outgoing data and clock signals to the interface format required by each data port Depending on the customer data equipment connected to the DIU the following may be used e V 35 RS 449 EIA 530 Verilink 1 7 DIU 2130 Overview Specifications Electrical environmental and mechanical specifications of the DIU 2130 and associated DIMs are given below Table 1 2 DIU 2130 and DIM Specifications Data Equipment Interface 1 0 Ports Two synchronous n x 56 kbit s or n x 64 kbit s where n is an integer from 1 to 24 If using both ports neither may be 24 Interfaces ITU T V 35 RS 449 or EIA 530 DCE to DTE or DCE to DCE V 35 Signal Levels 0 55V 20 balanced signals or 5V to 15V unbalanced RS449 Signal Levels 2V to 6V balanced per RS422 or 4V to 6V unbalanced per RS423 EIA 530 Signal Levels Same as RS449 Channelization D4 in accordance with AT amp T TR 62411 Clock Signal Steady clock at fractional T1 rate 32 ppm 40 to 60 duty cycle Clock Jitter 38 nanoseconds maximum Loopbacks Local and far end on each data channel Backup Battery Life Battery has power for three months without external power Power Requirements Current Drain 0 5A nomin
47. dule The upgraded plug in module is designated as the DIU 2130 DBU The option can use the Verilink ConnecT 56K Data Service Unit DSU as the interface to the backup circuit Third party devices with Data Terminal Ready DTR dialing can also be used Verilink 5 1 T1 Dial Backup Option Overview Features Available configurations Compatibility and requirements 5 2 The T1 Dial Backup Option offers the following features e Backs up n x 56 or n x 64 kbit s T1 circuits e Automatically dials and switches to the backup circuit on loss of frame or Dataphone Digital Service DDS Abnormal Station Code ASC e Failed circuit remains accessible for troubleshooting e Initiates the backup from either end in the event of a circuit failure e Dial backup automatic mode can be controlled manually The Verilink Access Manager 2000 AM2000 monitors the status of the switching and manages alarms and testing e Available in pre configured and field upgrade versions Downloads into existing DIU 2130 plug in module usingVerilink Advanced Programmable ArchitectureTM APA The T1 Dial Backup Option is a factory ordered item available in three forms e Plug in module DIU 2130 DBU EPROM upgrade kit Download upgrade kit You can download the software upgrade version of the T1 Dial Backup Option into the RAM of a standard DIU 2130 TheT1 Dial Backup Option is compatible with installed base AS2000 hardware The T1 Dial Backu
48. e CSU to send toward the T1 network In all cases the RECEIVE clock is derived from the incoming T1 datastream received from the T1 network The DIU Clock submenu is 1 THRU 2 INT 3 EXT 422 4 EXT TTL 5 NET 6 EQ 7 TIU 8 DIU gt 1 THRU Selects passive timing behavior The CSU uses the clock provided by the connected local DSX 1 equipment to drive the network signal THRU is recommended in many cases for drop and insert mode andit is the actual mode in which the CSU functions when it is in CSU mode Even though some selection other than THRU may appear as the current value if the CSU is in CSU mode it is actually operating with THRU timing 2 INT Selects the oscillator built in to the CSU card as the timing source This is often used in mux mode INT should only be selected at one end of a point to point T1 and only if the T1 does not have timing applied to it by the service provider phone company 3 EXT 422 Selects the balanced pair of input leads that are present in the DIN connector on the CIM behind the CSU Use of this option requires that the external clock being provided must be at 1 544 MHz in a balanced signal which meets RS422 specifications EXT 422 might be used in any CSU mode 4 EXT TTL Selects the unbalanced pair of input leads that are present in the DIN connector on the CIM behind the CSU Use of this option requires that the external clock being provided must be at 1 544 MHz in a 5V to OV signal lev
49. e displayed one after another allowing the user to monitor activity Leads are defined across the top line and their status is shown on the line below NO low logical off while YES high logical on The abbreviations stand for TXD Transmit Data RXD Receive Data DTR Data Terminal Ready DSR Data Set Ready RTS Request To Send CTS Clear To Send DCD Data Carrier Detect LL Local Loopback RL Remote Loopback TM Test Mode LOS Loss Of Signal Use F1 to turn Far End loopback on or off for port 1 Verilink Alarm Enable DIU Bus DIU 2130 Configuration Use F2 to turn Far End loopback on or off for port 2 The Far End loop is also called a remote DTE loop it is a loopback test that takes place in the DIU and is bidirectional A loop up or loop down code is sent from the near site to the far site through the T1 On the DIU at this site the Far End Loop LED will come on for the port which is in loopback On the DIU at the far site the Near End Loop LED will come on for the port that is in loopback If alarm reporting is enabled messages will appear on the craft interface screen as alarms occur and clear If disabled this does not occur The DIU Data Bus option looks like DSU Bus 1 NONE 2 A 3 B 4 C 5 B D amp I EQ 6 A DAI NET gt This very critical option determines the mode in which the CSU will operate and which of the three busses in the shelf if any will be used to pass data back and for
50. e various loop codes are received Activates and deactivates a near end loopback Most useful for activating and deactivatingV 54V 54 a far end loopback Verilink Nx56K and Nx64K modes V 54 56K DDS modes TIEI 2 FT1 Nx56K and Nx64K modes Tp test and monitor BEC Initiates a 511 2047 or Verilink test pattern and displays an error monitor Pp monitor leads and status Shows and updates the real time handshake leads and status every two seconds In 56K DDS mode the last received DDS control code or data will also be displayed Verilink Appendix DIU DIM Details Verilink DSUs have two sides A Network T1 Side An Equipment Side The equipment side of the DSU is a Data Communication Equipment DCE interface In a standard configuration the equipment connected to the DSU is the Data Terminal Equipment DTE Figure 7 1 Figure 7 1 Standard DCE to DTE Configuration Interface Cable Customer y N DSU MMI Eguipment DCE DTE A A T1 RCV DTE Interface DCE Interface The DIU 2130 supports three types of DTE interfaces ITU T V 35 RS 449 422 and EIA 530 The RS 449 422 EIA 530 and V 35 interfaces are logically equivalent The only difference between the three are their electrical interface characteristics voltage levels and connectors Figure 7 2 Verilink 7 1 DIU DIM Details Figure 7 2 DIU 2130 Data Signal Connections
51. el EXT TTL might be used in any CSU mode 5 NET The most widely used value for this option If it is known that the T1 passes through a DACS or if the far end CSU is set for INT clock then always choose NET NET is commonly used in mux mode and may occasionally be used in drop and insert mode for situations where the T1 equipment does not provide a reliable clock source When connecting to a fractional T1 or frame relay T1 and operating in mux mode always select NET 6 EQ Similar to THRU The clock signal derived from the DSX 1 T1 equipment is used as the transmit clock source for the CSU This choice is invalid for mux mode may be useful in drop and insert mode Verilink DIU 2130 Configuration TIU Used only if the shelf has a TIU 2850 timing circuit module installed This is a special circuit card which takes a T1 signal in on one of several ports recovers a clock signal from that input then propagates that clock signal to all of the slots in the shelf using bus C This option should not be selected unless a TIU 2850 is installed in the shelf DIU Used for tail circuit timing A single port of a single DIU 2130 may be used to provide clock for that DIU and the CSU if necessary Three options must be set for tail circuit timing a IntheDIU 2130 the port to be used to provide timing must be set to TT clocking b In the DIU 2130 the timing source must equal the port being used port 1 or port 2 instead of the usual
52. ell the DTE the exact frequency to transmit on the SD and TT leads The DTE uses the ST signal to clock data onto the SD lead Figure 7 6 Verilink 7 3 DIU DIM Details Figure 7 6 Send Timing ST Customer Equipment DSU A DTE DCE sD XMT Butter J Input Butter dm TT i Ne ST ia Receive RD Clock Buffer E 4 2 Recovery lt T1 RCV RT 3 4 E Since TT must be locked to ST most DTE manufacturers turn ST around on TT and TT is usually an exact duplicate of ST Figure 7 7 Figure 7 7 Interface Timing Options Customer Equipment DSU DTE DCE SD XMT Buffer Input Buffer T1 XMT A TE TT 7 0 4 M ST A Receive RD Clock Buffer 2 Recovery 4 T1 RCV 2 p RT 4 C A 4 Therefore the DIU can be set to clock in SD using ST instead of TT Consequently some DTE manufacturers do not implement the TT signal If the cable between the DIU and DTE is long enough the DIU may require setting the clock for inverted ST rather than ST this allows for a slight phase shift For the DCE DTE interface to function properly the data signals must be synchronized with the associated clock signals Therefore the following signals if implemented must be synchronized RD with RT TT with ST with SD In the T1 transmit direction SD and TT if implemented must both be synch
53. end a zero conversely if HDLC inversion is on all zeros are sent as ones If HDLC Invert is On at one end of acircuit it must be On at the other end as well to avoid outputting inverted data to the far end DTE 3 10 Verilink Clocking DIU 2130 Configuration Enter K1 to select the clocking option for port 1 Enter K2 to select the clocking option for port 2 There are three choices available for clocking a DIU 2130 port ST INV_ST TT This option selection determines which clock signal and or which phase of that clock signal will be used to control the sampling of the transmit data presented by the DTE The best choice for this option is most often determined by factors outside the DIU 2130 therefore it may be necessary to try varying this option while monitoring the far end DTE device for reports of received errors In all cases the DIU 2130 will present a clock signal to the DTE the source of that transmit clock signal is determined by the timing source option not by this option No matter what selection is made here ST INV ST or TT it will not change the phase or the frequency of the Transmit Clock signal being sent to the DTE If ST is selected the DIU 2130 will sample the transmit data lead to determine if the DTE is sending a one or a zero at the instant of the negative going transition of the transmit clock signal This is the selection which is most often used The lo
54. er Detect a control lead presented by the DCE Data Communications Equipment to indicate that it is receiving a valid framed signal The Verilink DIU 2130 is DCE Data Communications Equipment which outputs DCD This option allows the DIU 2130 to output DCD as a HIGH or asserted value at all times for that port This feature can be set independently for port 1 and or port 2 The user types DCD and gets this response force dcd handshake port s 1 1 2 2 3 both 4 none gt The display shown reflects DCD forced on port 1 and not on port 2 Mode For each port the Mode may be set to either 56K or 64K This selection determines the bandwidth usage per DSO a DSO is the same thing as a timeslot and is also sometimes called a channel To set the mode for port 1 type M1 To set the mode for port 2 type M2 If the T1 circuit being used is AMI the mode must be 56K If the T1 circuit being used is BBZS the mode may be either 56K or 64K as the user or application may require Verilink 3 9 DIU 2130 Configuration Command Options Scramble HDLC The Sp command is used to enable or disable two options Scramble and HDLC Invert which are related to ones density Since there is no requirement for ones density on a B8ZS T1 there is never a reason to use scramble or HDLC inversion on a B8ZS T1 If asserting one of these functions appears to clear up a problem on a B8ZS T1 it would indicate there is a service problem
55. ermittent the integration process decays at the rate of 1 5 of the rise slope Alarms clear when 15 seconds have elapsed without the DDS control code Thefollowing DDS status codes have an associated alarm threshold which will cause an alarm to be generated when reached Abnormal Station Code ASC This indicates that channelized data upstream is disrupted Control Mode Idle CMI This is an idle pattern sent when no channelized data is present This may be normal for some types of circuits MUX Out Of Sync MOS Indicates that a loop is established upstream or the DS 1 signal is in an out of frame condition Unassigned MUX Channel UMC Similar to MOS an upstream device has disrupted the transmission path Verilink 6 11 56K NMS Option Overview Figure 6 2 AM2000 Display of Optionable Alarm Parameters for DIU 2130 DDS Group 1 DDS Codes This threshold setting affects the following DDS codes Block Code BLK MJU Alert MA Test Alert TA Test Code TC Release RLS Individual counters are kept for each of the listed DDS codes and when the counter exceeds this value an alarm specific to the exceeded counter will be generated Verilink 56K NMS Option Overview Table 3 DIU 2130 DDS Alarm Codes lists the alarm codes that can be sent by the DIU 2130 when configured for 56K DDS Table3 DIU 2 130 DDS Alarm Codes
56. erted by the DTE then no user data is conveyed end to end If the DTE does not assert RTS this option allows the DIU 2130 to behave as it would if RTS were asserted by the DTE The DIU 2130 will output CTS Clear To Send as a high or asserted value when RTS is on for that port This feature can be set independently for port 1 and or port 2 The user types RTS and gets this response force rts handshake port s 1 1 2 2 3 both 4 none gt The display as shown in our example reflects RTS forced on port 1 and not on port 2 CTS Clear To Send a control lead presented by the DCE Data Communications Eguipment to indicate that the DTE may now transmit CTS is the logical result of RTS being on and no major alarm condition being present The Verilink DIU 2130 is DCE Data Communications Eguipment which expects to receive RTS as an input from the DTE Data Terminal Eguipment Typically if RTS is not asserted by the DTE then no user data is conveyed end to end If the DTE does not assert RTS this option allows the DIU 2130 to behave as it would if RTS were asserted by the DTE The DIU 2130 will output CTS Clear To Send as a high or asserted value when CTS is on for that port This feature can be set independently for port 1 and or port 2 The user types CTS and gets this response force cts handshake port s 1 1 2 2 3 both 4 none gt The display shown reflects CTS forced on port 1 and not on port 2 DCD Data Carri
57. eviations can appear in this field ASC Abnormal Station Code BLK MJU Branch Block CMI Control Mode Idle FEV Far End Vace LBE Loop Back Enable MA MJU Alert MOS Mux Out Of Sync RLS Release TA Test Alert TC Test Code TIP Transition In Progress UMC Unassigned Mux Channel ZCS Zero suppression If an unknown code is detected then the received data bits will be displayed in hexadecimal format as shown in Figure 3 The threshold exceeded fields and DDS status byte field are only available for ports configured for 56K DDS mode If the port is not configured for 56K DDS mode then the fields for that port will be displayed with N A Verilink Managing Alarms Alarm Detection Alarm Parameters 56K NMS Option Overview The 56K NMS Option generates the following alarms ASC Abnormal Station Code CMI Control Mode Idle LB Local Loopback Alert MOS Mux Out of Sync TM Local Test Started UMC Unassigned Mux Channel Group 1 DDS Codes BLK Block Code MA MJU Alert RLS Release Code TA Test Alert TC Test Code Detection of alarms is based on exceeding the thresholds based on a leaky bucket algorithm The thresholds are variable and can be set by the user in seconds from 1 to 255 Setting the alarm thresholds to 0 will disable the alarms same options as CSU alarm configuration If the DDS control code is received continuously for the specified period then the alarm is declared If the circuit is int
58. fer f EN T1 XMT Frequency TT Sa ST Clock Recovery FTN Rm t ft Ti RCV Frequency RT T1 XMT Frequency T1 RCV Frequency Verilink 7 5 DIU DIM Details Internal Timing In internal timing the ST signal is generated from an internal oscillator while the RT signal is generated from the recovered T1 signal clock There is no connection between the two transmission directions RT is generated separately from ST and the T1 transmit frequency is not necessarily synchronized with the T1 receive frequency The T1 transmit and receive frequencies will be synchronized if the far end circuit is looped timed However the T1 transmit and receive frequencies will be different if the far end DIU is set for internal or external timing Figure 7 10 shows the timing signal paths for internal timing Figure 7 10 Internal Timing External Timing 7 6 Customer Equipment DSU DTE DCE Input Buffer f gt gt Ti XMT Frequency gt f h TT f Q o Na T 4 S das Conv Clock Recover f Vie ap T1 RCV Frequency h RT If the Far End is looped timed then T1 XMT Frequency is T1 RCV Frequency If the Far End is not looped timed then T1 XMT Frequency T1 RCV Frequency In external timing the ST signal is generated from an external oscillator while the RT s
59. figure four channels are assigned to each of the four DIU data ports for network transmission The composite data going to the CSU contains the multiplexed data from all associated DIUs Upon receiving this data the CSU multiplexes it into a DS1 signal for transmission over the T1 network It also sends all ones bytes on all unassigned channels In the other direction of transmission the CSU routes the incoming signal to all DIUs via the assigned data bus Each DIU demultiplexes the incoming signal to derive the individual channel data The CSU also sends clock and framing signals to the DIUs over the assigned data bus These signals synchronize the DIU transmit and receive side circuits to the CSU The CSU derives the CSU and DIU transmit clocks and the DIU receive clock from one of the following reference clocks Theinternal crystal oscillator clock generated in the CSU circuits An external 1 544 MHz DS1 AMI optional with a TIU 2850 timing coprocessor or RS 4220r TTL reference clock External timing N x 56 or N x 64 kbit s optional through the TIU 2850 timing coprocessor Theincoming signal from the network or equipment interfaces loop timing Terminal Timing TT signal from a data terminal equipment DTE device connected to a DIU 2130 The CSU accommodates up to 24 DIU 2130s over the selected data bus It can also interface with any combination of DIUs whose aggregate capacity is 24 DSO channel time slots
60. g Do not use liquid cleaners or aerosol cleaners Use a cloth slightly dampened with water Do not placethis product on an unstable cart stand or table It may fall causing serious damage to the product Slots and openings in the shelves are provided for ventilation to protect them from overheating These openings must not be blocked or covered Never place this product near a radiator or heat register Verilink DIU 2130 User Manual This product should be operated only from the type of power source indicated on the marking label and manual If you are unsure of thetype of power supply you are using consult your dealer or local power company Do not allow anything to rest on the power cord Do not locate this product where the cord will interfere with the free movement of people Do not overload wall outlets and extension cords as this can result in fire or electric shock Never push objects of any kind into the shelves They may touch dangerous voltage points or short out parts that could result in fire or electric shock Never spill liquid of any kind on this equipment Unplugthe equipment from the wall outlet and refer servicing to qualified service personnel under the following conditions When the power supply cord or plug is damaged or frayed If liquid has been spilled into the product If the product has been exposed to rain or water If the product has been dropped or if the cabinet has been damaged
61. g to the appropriate download or EPROM replacement procedures found towards the back of this document Re configure the DIU for T1 Dial Backup Option operation For new installations create a node prior to this step Assure that the cabling is properly terminated For specifics on the interface connectors or shelf backplane consult the DIU 2130 sections in the AS2000 manual set Begin initial testing by activating loop backs and generating various test patterns onto the network A counter maintained during the test indicates the number of bit errors occurring in the network When the tests have completed successfully place the circuit in service The following sections detail the various screens and steps involved in installing and managing the T1 Dial Backup Option NOTE If you are not already familiar with the ConnecT 56K DSU unit you will need a copy of the ConnecT 56K DSU User Manual to configure your dial backup system Verilink 5 5 T1 Dial Backup Option Overview Connecting Figure 3 shows the cable connections from the DTE to Port 1 of the Cables for Dial DIU 2130 DBU and from Port 2 of the DIU 2130 DBU to the Backup ConnecT 56K DSU Figure3 Cabling for D U2130 DBU and ConnecT 56K DSU DTE to DCE cable Port 1 DTE DIU 2130 DBU T 56K D DEEHEDOEWsE 77228 Crossover If the T1 Dial Backup Option is configured for V 35 refer to the cable part numbers in Table 5 1 Table 5 1 V 3
62. gth of cable in the opposite direction so that it will arrive at the DCE before it samples again Some manufacturers among them Cisco Systems take the transmit clock signal provided by the DCE and loop it back toward the DCE on an optional third pair of clock leads In V 35 this pair is SCTE Serial ClockTransmit External plus and minus in RS449 they are called TT Terminal Timing This is the actual clock signal which the DCE originally sent so it is at the same frequency but it is subjected to the same delay and waveshape distortion as the transmit data since it travels the same length of cable When TT is selected the DIU 2130 looks to SCTE or TT for aclock signal and uses that clock to control when it samples transmit data Since this clock is expected to be perfectly in phase with transmit data it solves the sampling issues described above Therefore Verilink Tech Support recommends selecting this option whenever the DTE presents this optional third clock signal If the DTE is not actually presenting a clock signal on the SCTE or TT pair selecting TT will cause a high error rate If desired the DIU may be configured to monitor either one of two leads RTS or DTR which typically are asserted by the DTE When this lead is not asserted an alarm is then reported In this way the DIU can be relied upon to report if one of these conditions occurs DTE is powered down DTE cable is disconnected DTE goes offline Verilink Statisti
63. h port operates at 56 kbit s and requires one DSO channel on the T1 network The DIU 2130 can also be used with an NCC SCC or TAC in drop and insert mode This mode permits a combination of analog VF and high speed data to be transmitted over a single T1 circuit on the network Drop and insert is transparent to the DIU hardware and depends on the configuration of the CSU Drop and insert can be provided toward either the DS1 equipment or the network Three separate data buses A B and C convey data between the DIUs and the associated NCCs SCCs or TACs These buses are located on the system shelf backplane and can be extended from shelf to shelf through data bus extension cables In T1 multiplexer CSU DSU mode one data bus is assigned to each CSU DIU array In drop and insert data bus A is typically assigned to each DIU CSU array A second bus is also needed if the DIUs and CSU are timed from an external clock source or if they are timed from the data equipment connected to a DIU data port Verilink Transmit Side Functions DIU 2130 Overview Figure 1 7 shows the signals conveyed between the DIUs and associated CSU on the assigned data bus In the transmit direction toward the network the data bus sends the output data from each DIU to the CSU of the NCC or TAC It also sends clocking and framing information from the CSU to the DIUs The transmit clock synchronizes the DIU transmit side circuits to the CSU In the inco
64. hannel Exceeded Alarm Verilink 6 13 56K NMS Option Overview Table 3 DIU 2 130 DDS Alarm Codes Alarm Code Description 836 Port 2 Unassigned Mux Channel Alarm Cleared 837 Port 2 MJU Alert Exceeded Alarm 838 Port 2 MJU Alert Exceeded Alarm Cleared 839 Port 2 Test Code Exceeded Alarm 840 Port 2 Test Code Exceeded Alarm Cleared 841 Test Alert TA Port 2 842 Test Alert TA Port 2 Cleared 843 Port 2 Block Exceeded Alarm 844 Port 2 Block Exceeded Alarm Cleared 845 Port 2 Release Exceeded Alarm 846 Port 2 Release Exceeded Alarm Cleared 847 Port 2 Looped Alarm 848 Port 2 Loop Cleared 849 Far Port 2 Looped Alarm 850 Far Port 2 Loop Cleared 851 Port 2 Test Signal Alarm 852 Port 2 Test Signal Cleared 1013 Low Battery Alarm Managing Loopbacks Loopbacks are used for sending and receiving test patterns on a circuit The 56K NMS Option provides different types of loopbacks loopback modes and test patterns Once the loopback is established you can send the test pattern from the near end unit This section describes how to select a loopback and configureits loopback mode Types of The 56K NMS Option provides the following methods of activating Loopbacks the DIU 2130 bidirectional DTE loopback DDS Latching Loopback OCU CSU DSU This loopback is discussed in a separate subsection below ITU T V 54 useful in DDS mode Local DTE loopback Remote RL lea
65. he handshake lead Carrier Detect CD on the Port 2 interface goes high Once the failed condition clears port 1 drops the backup line and resume normal operation over the T1 line AUTOMATIC MANUAL Similar to AUTOMATIC AUTOMATIC mode Port 1 connects to port 2 upon any of the above conditions However it does not switch back when the condition clears You must switch it back manually from the online Test Activity menu by selecting the Deactivate backup connection menu option See Figure 5 2 5 8 Verilink T1 Dial Backup Option Overview MANUAL MANUAL The port does not switch when any of the above conditions occur Table 1 provides the default setting and range of parameter values for the user programmable options Table 1 DIU 2130 DBU Configuration Settings Option Default Range of Values Installed and operational No Y N Save configuration to DIU No Y N Enable alarm reporting No Y N Connected CSU shelf 0 1 4 Connected CSU plug 0 1 13 Port 1 Channel Assignment unassigned 1 24 Port 1 Backup Mode Automatic Manual Automatic Port 1 EQP Name blank 16 characters Port 1 EQP SER blank 16 characters Port 1 EQP Interface blank 16 characters Port 1 EQP Speed blank 16 characters Port 1 DS0 mode No Y N Port 1 Enable Selected Loops Yes Y N Port 1 Enable Scramble No Y N Port 1 EQP Clock ST ST INV ST TT Port 1 Force DTR No Y N Port 1 Force RTS No
66. hed you can send the test pattern from the near end unit The test pattern is placed only in the channel allocated to the port being tested The example circuit shown in Figure 7 illustrates the diagnostic capabilities provided by AS2000 within the DDS network that is accessible from AM2000 Figure 7 DIU 2 130 DDS Example Test Pattern Circuit AS2000 Shelf DIU 2 130 NCC 2020 Central Office 7 ConnecT 56K DSU A Backplane Buses ov Test Pattern f AM2000 DTE Port Management Port RS232 In this example a DIU 2130 with DDS capability is connected to a ConnecT 56k DSU at the far end To test the network circuit a remote loop back is first activated In a DDS circuit to a ConnecT 56 either a DDS latching loop or a V 54 loopback option can be used to perform the remote loop back Verilink 6 17 56K NMS Option Overview You can send and monitor diagnostic test patterns from the AM2000 Online Access Loopbacks and Online Access Select Test menu items The AM2000 displays the results of the test The Status menu described in the section titledStatus Monitoring indicates when a test pattern is being sent The AM2000 menu shown in Figure 8 lists the available test patterns you can select Figure 8 AM2000 Screen display of the Select DIU2130 DDS Test Activity Menu Verilink test pattern is a 4 bit pseudo random test pattern It is not very useful in DDS mode
67. ia puede explotar si se reemplaza incorrectamente Reemplace la bateria con el mismo tipo de bateria una equivalente recomendada por el manufacturero Dis ponga de las baterias de acuerdo con las instrucciones del manufacturero ATTENCION Para evitar contacto con circuitos que electrocutan la fuente de alimentaci n debe ser instalada por un t cnico profesional La terminal de la fuente de alimentaci n marcada con el s mbolo de tierra debe ser conectada a un circuito de vuelta por tierra permanente PELIGRO Circuitos que se interconectan a la red de telecomunicaciones deben hacerse de tal manera que cumplan con los requisitos estipulados en las especificaciones EN60950 1992 A4 1997 Secci n 6 2 para los voltages de circuitos interconnectados D la Red de Telecomunicaciones TNV despues de terminar las connecciones entre os circuitos Verilink DIU 2130 User Manual iii Deutsch Canadian Requirements Safety Precautions VORSICHT Explosionsgefahr bei unsachgem em Ersetzen der Batterie Batterie gleichen Typs und gleicher Qualit t benutzen wie vom Hersteller empfohlen Entsorgung der Batte rie nach Anweisung des Herstellers VORSICHT GEFAHR Um keinen Schlag zu erhalten beim Versagen der electrischen Anlage muss der Stro manschluss von einem Elektriker vorgenommen werden Der elektrische Pol verse hen mit dem Erdsymbol muss am Stromanschluss permanent geerdet sein VORSICHT Schaltungen
68. ignal is generated from the recovered T1 signal clock There is no connection between the two transmission directions RT is generated separately from ST and the T1 transmit frequency is not necessarily synchronized with the T1 receive frequency The T1 transmit and receive frequencies will be synchronized if the far end circuit is looped timed However the T1 transmit and receive frequencies will be different if the far end DIU is set for internal or external timing SeeFigure 7 11 Verilink DIU DIM Details Figure 7 11 External Timing Customer Equipment DSU DTE DCE brad E p T1 XMT Frequency TT E gt Nat 4 ST EXT C le A Ti RCV Frequency RT gt If the Far End is looped timed then T1 XMT Frequency is T1 RCV Frequency f the Far End is not looped timed then T1 XMT Frequency T1 RCV Frequency DIU 2130 Clear Channel Operation Requirements Clear Channel T1 Line This section contains information on the Data Service Unit DIU 2130 clear channel operation requirements for 64 kbit s transmission On a normal T1 line the following two requirements must be met before transmitting the data onto the public network as requested by most tariffs 1 Average ones density requirement in general 12 5960f transmitted data must be ones or the transmitted data must have an average density of 12 5 2 Consecutive zeros requirement tr
69. igns timeslots 13 through 24 to Data Port 2 Press ENTER again to refresh the display with the timeslot DSO assignments Figure 3 3 DIU 2130 Configuration Menu DIU 2130 C CSU T timing source chnl 01 02 03 04 Dp port 01 01 01 01 Lead Toggles Forced Ports Mp mode Sp scram hdlc inv Kp clocking Gp LOS lead Ep enable loop Np near loopback Fp far loopback 1 2 DIU 2130 gt CONFI GURATI ON DI AGNOSTIC MENU 1 1 CSU 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 01 01 01 01 01 01 01 01 02 02 02 02 02 02 02 02 02 02 02 02 DTR DSR RTS CTS DCD I Port 1 Port 2 Statistics 56K 56K FW HW Rev 1 6 0 8 N N N N Batter eis OK ST ST DTE Intf V 35 V 35 NONE NONE Data bUS A YES YES Tp test and monitor BEC OFF OFF Pp monitor leads and status ON OFF A Alarm Enable YES 3 6 Lead toggles are used to determine whether the control leads on the synchronous serial interface will function in the normal way or be forced on When the DTE does not assert control leads they can be forced on by typing the three letter abbreviation of the control lead For this example the DTE supports normal control lead operation and the default values are appropriate Mode is used to determine the data rate of each of the timeslots assigned to the port For an AMI T1 circuit the mode must be 56K For the B8ZS T1 used in this example
70. iguration LOS Lead If the value selected is other than ideal the DIU 2130 may be sampling the transmit data lead at or near the transition between one bit and the next This will cause errors because the DIU 2130 may sense what is actually aone as azero or vice versa Longer cables and higher data rates cause more rounding of the otherwise square transitions from one bit to the next Poorer quality DTE cables have higher capacitance per foot which accelerates the rounding off effect on pulse edges This means that even as the width of a data bit is decreasing the portion of that data bit that may be used to reliably sample is also decreasing Thus the higher the data rate the more critical this selection becomes For receive data and the relationship to receive clock long cables do not present problems of this sort This is because both the receive data and the receive clock originate in the DCE travel the same length of cable and are subjected to the same delay They arrive at the DTE still in phase with each other Transmit data presents a different case the transmit clock signal is generated by the DCE It must travel the unknown length of cable to reach the DTE being subject to unknown delay The DTE does not react to transitions of transmit clock until they reach it some delay will always be present Once the DTE senses a clock transition it presents the next data bit which is to be transmitted This data must now travel the len
71. iguration restores the original DIU configuration from the battery protected NVRAM in the NCC This works only if the configuration of the DIU has been previously saved to the NCC If the DIU 2130 is controlled by an SCC the Restore CSU Configuration option will return an error message This function is not supported by the SCC CSU The C command is used to assign the DIU 2130 to the CSU from which and to which it will be transferring user data The selected CSU is then displayed inside brackets The DIU 2130 will poll the CSU to get information such as which of the data busses in the shelf is to be used A Bor C During DIU 2130 installation assign the CSU first New DIU 2130s are shipped with a value of 0 0 for this option Since there is no slot 0 shelf 0 this has the effect of insuring that the DIU 2130 may be added to a shelf with operating circuits and not bring down any existing applications If you fail to change the CSU assignment from 0 0 to the desired value the DCD lead to the DTE will remain in low inactive state and the card will appear to be defective Timing Source The T command on the DIU 2130 Configuration Diagnostics menu is used to set the master timing source for the DIU 2130 The submenu looks like T1 timing source 1 port 1 2 port 2 3 csu In most cases the value CSU will be selected to let the timing source being used by the associated CSU also time the DIU 2130 In the les
72. iming Network timing Equipment timing External timing Data equipment timing DTE In all of the above timing modes the transmit and receive clocks sent by the CSU to the DIUs over the assigned data bus are 1 544 MHz clocks The DIUs divide these clocks down to the proper rates before sending them to the customer data equipment Through timing is commonly used in drop and insert mode Signal clocking through the CSU occurs as described above in each direction Also the CSU sends the transmit and receive clocks to the DIUs These are used to clock data from the T1 multiplexers of the CSU to the associated DIUs and from the DIUs to the CSU For through timing with drop and insert toward the network the receive DIU clock is derived from the incoming network signal and applied to the DIUs via Data Bus A Figure 7 13 The DIU transmit clock and the CSU transmit clock to the network are similarly derived from the incoming signal from the equipment The transmit and receive clocks are applied to the DIUs via Data Bus A In loop timing the reference clocks that synchronize the CSU with the associated DIUs are derived from a DS1 signal received by the CSU These clocks can be derived from either the incoming network signal network timing or the equipment signal equipment timing Typical applications of network timing in the T1 multiplexer and the drop and insert CSU modes are shown in these figures Figure 7 15 Figure 7
73. kup Option Overview issues 5 1 F atures e a a na a K a a a A a 5 2 Available configurations ussssssensnnnnnnnnnnnn emen aaa 5 2 Compatibility and requirements sssssssse eene 5 2 How dial backup works sis 5 3 Upgrading to the T1 Dial Backup Option sssemm aaa 5 4 Preconfig red Option tremere c EU ERR Ruin enun 5 4 Download Upgrade sise 5 4 EPROM Upgrade 0 3 cte eren EGREGIE IHRER RM ME RENS 5 4 Installation and Management ss 5 5 Connecting Cables for Dial Backup oocccoocccccnoccccnnnncnnnnnnnnnnnnnonanannnnnncnnnnns 5 6 Detecting a DIU 2130 DBU 0 0 cece e ete aaa aa Aaaa aa aaa aaa kaka aaa nnn 5 7 Configuring Modes for Dial Backup aaa aa cece eee teeter eee ee meme 5 8 Monitoring Dial Backup Status 0 0 aaaaa kaka kana aaa eee aaa aaa aaa Aaaa aa ener 5 9 Managing Alarms and Testing coocccccncccnnnncnnnnncnnnnnonnnnnncnonnnanonncnnnoncnnnnnncannnnos 5 10 Managing Dial Backup Alarms sese 5 10 Manually Controlling Dial Backup semmH nen 5 11 Testing Before or After a T1 Circuit Failure seeeeeee 5 11 Configuring the ConnecT 56K DSU for Dial Backup esee 5 12 56K NMS Option Overview ssee e eme aa aaa Aaaa aaa aaa aaa aaa 6 1 Application Example sise 6 1 Features T 6 2 Status Control Codes nennen aaa a aaa mm ener 6 2 AMOS o S 6 3 Loopback Codes TT 6 3 Available DIU 2130 DDS Configurations nennen 6
74. lot gt prompt type 1 again This selects the SCC 2020 in slot 1 of shelf 1 as the CSU for this DIU 2130 module Verilink 2 3 DIU 2130 Quick Set up The Timing Source defaults to CSU meaning that the DIU 2130 will derive its transmit clock from the source selected in the CSU configuration recovered network clock in this example This is correct for this example The DSO timeslot selection prompt appears as an uppercase D with a lowercase p The lowercase p is a variable Instead of typing p use a port number 1 or 2 For this example timeslots 1 through 12 are to be used on Data Port 1 and timeslots 13 through 24 areto be assigned to Data Port 2 Type D1 and press ENTER At the prompt enter port 1 channels gt type 1 12 and press ENTER This assigns timeslots 1 through 12 to Data Port 1 Now type D2 and press ENTER At the prompt enter port 2 channels gt type 13 24 and press ENTER This assigns timeslots 13 through 24 to Data Port 2 Press ENTER again to refresh the display with the timeslot DSO assignments Figure 2 3 DIU 2130 Configuration Menu DIU 2130 C CSU T ti mi ng source Mp 5p Kp Gp Ep Np Fp chnl Lead Toggles Forced Ports mode scram hdlc inv clocking LOS lead enable loop near loopback far loopback 1 2 DIU 2130 gt 01 02 03 04 Dp port 01 01 01 01 CONFI GURATI ON DI AGNOSTI C MENU 1 1 CSU 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 2
75. m powers up and any module does a self test Power is lost from one of the redundant power supplies A default or user designated threshold is exceeded Verilink 4 3 Troubleshooting Figure 4 2 Alarm Buffer e A Yellow Alarm is received from the network DS1 e An unframed all ones or alarm indication signal AIS is reveived from the network e There is a loss of signal LOS or loss of frame LOF A CSU or Data Port loopback is present A module fails A module is removed from the shelf 1 1 SCC gt o DIU 2130 1 2 DIU 2130 1 2 Press enter ocati IS IS Threshold 18 38 35 ort 1 09 98 ort 1 09 98 18 37 17 o continue Module Type Shelf Slot Alarm Description Location Alarm Date and Time Alarm Classification Port Status Code Alarm Description Classifications Problem Types 4 4 The status code column displays a decimal code when using an ASCII terminal Varies depending on the SNMP or ASCII terminal used The alarm description column lists the text which is printed on the display sent to the alarm printer saved to the alarm buffer database Verilink classifies alarms into the following severities Critical Major Minor Warning Info Cleared These classifications are further categorized into the following problem types LOS LOF Verilink Troubleshooting Error Call Setup
76. ming direction from the network the data bus sends the data from the CSU to the DIU It also furnishes receive clocking and framing information to the DIU for synchronization of the DIU s receiver to the CSU The DIU transmit data port accepts the data from the customer equipment for the designated DSO channels The data from both ports is multiplexed and sent to the associated CSU through the assigned data bus Figure 1 8 DIU 2130 Block Diagram DATA EQ 1 DATA EQ2 Data Receiver Serial FIFO Buffer DIU 2130 XMT DATA TEST amp CLOCK CODE L rowr FIFO inte pl GEN LOGIC cLock DET LPBK GEN amp t RCV DATA MUX amp FIFO Y 4 8 CLOCK SCRAM DATA Ti DRVR FIFO 4 BLER 4 pl MUX Lp DRVRS Oy gt TO FROM XMT DATA DEMUX amp I BACKPLANE 18 CLOCK acvn FFO TZS ROVAS DATA BUS LOGIC Stock IN LPBK GEN amp Le RCV DATA M FIFO Lg CLOCK DRVR FIFO 4 BLER Ve The data receiver converts the V 35 RS 449 or EIA 530 data and control signals to a format suitable for internal DIU processing The data signals are in a balanced differential format The control and timing signals are either balanced or unbalanced depending on the interface used Each DIU input output I O port is equipped with a 256 x 1 bit first in first out FIFO buffer at the data interface The FIFO pr
77. nd CSU at each end Figure 4 1 DIU 2130 Data Channel Loopbacks DIU 2130 DATA CHANNEL XMT LOOPBACKS gt DATA EQ DATA TO FROM BUS NETWORK RCV The DIU data channel loopback can be activated and deactivated on either data channel When this loopback is activated only the selected data channel is tested The other data channel continues to operate normally and transmission service is not affected V 54 Data Channel The V 54 data channel loopbacks are identical to the loopbacks Loopbacks shown in Figure 4 1 above however they can be activated by the Data Terminal Equipment connected to the DIU 2130 s Data Interface Module DIM The three V 54 leads used to activate these loopbacks are LL activates the data channel loopbacks on the DIU 2130 at the local node the node to which the DTE sending LL is connected RL activates the data channel loopbacks on the DIU 2130 on the far end of the network connection TM is set high by the DIU 2130 upon successfully activating LL or RL to notify the DTE of its current state Once the DTE sets LL or RL low the DIU 2130 will deactivate the data channel loopbacks and return to normal transmitting state Interpreting Alarms The alarm buffer displays the following information about alarms This information may vary depending on the controller module and management method used Whenever the syste
78. nels 13 through 24 toward the network It also sends all ones idle bytes to the network on channels 1 through 12 from the equipment for far end DS 1 equipment channel conditioning In the opposite direction the CSU sends the VF on channels 1 through 12 of theincoming network signal to the channel bank It also inserts all ones on channels 13 through 24 and sends this data to the eguipment In addition if the CSU detects an LOF from the equipment it sends an RAI to the eguipment If the eguipment uses SF framing the RAI all B2 bits zeros overwrites the data on all channels Verilink 7 17 DIU DIM Details Figure 7 20 Drop and Insert LOF RAI Processing Detection from Equipment 7 18 DROP AND INSERT TOWARD NETWORK ALL ONES ch 1 12 Insert DIU data ch 13 24 LOF CSU a VF on um T CHAN BANK ch 1 12 NETWORK e NET VF ch 1 12 i ALL ONEs ch 13 RAI is sent to equipment if 24 RAI CSU detects LOS from equipment INSERT DATA EGPT DROP uf Bus ch 13 24 Drop DIU data When the CSU detects an LOF from the equipment the DIUs perform channel conditioning operations on the associated data equipment Each DIU negates the CTS DSR and DCD handshaking signals to the associated customer data equipment if not configured by the user to permanently assert these signals It also sends all ones idle bytes to the
79. ninnnns 3 1 Handshake Control Leads ss 3 2 Verilink DIU 2130 Configuration Diagnostics ccccoocccnncccnnnnccnnnnncnnnnnnnonnnaccnnnos 3 3 Gonfig ring the DIU 2130 ie n cin 3 3 Configuration Menu urteilen en 3 4 Configuration Menu Details ss 3 7 CLOCKING ern 3 11 LOS Lead dae eit a asas deca cans ode aa DI a ad 3 12 SEAEISENCS p ae Me A i aaa en BE Dios EN 3 13 Data BUS sn ne Email 3 13 Enable LOOP 42 52 ST 3 13 TEST MONITOF ae RO RO ta ada 3 13 Verilink DIU 2130 vii GA scr 3 14 Monitor Leads onere lesen 3 14 piment TEMA 3 14 Alarm Enable ie eed naa 3 15 DIU BUS vui ee a QUOD REI e ais 3 15 DIU Clock une eh 3 16 Troubleshooting nie e tege ex edo Rede Rev ae e Du tke tS re edens 4 1 Near End Loop LED cine Ernie aa 4 1 Far End Loop LED 1 sea did 4 1 SUED 4 1 Loss of Clock Alarm Notification sssemm 4 2 Loss of Signal Alarm Notification sssssmm 4 2 Test Signal Detector ss 4 2 Data Channel Loopbacks ooccccnncccnnnnccnnnncncnnnnanonnnnnnnnnnononnnnncnnnnnnns 4 2 V 54 Data Channel Loopbacks ssesseeeee 4 3 Interpreting Alarms sssssesssesees enne nenne nnne nnne ninh eee anes nnne 4 3 Status Code u ea Bas nt de ea ne 4 4 Alarm DescriptiQOn Laninas alina eevee or i i i ia i de eue idee cie 4 4 Classifications 1 5 oem E a aKa 4 4 Problem TYPES caia ER MSS 4 4 What To Do About Alarms suisses 4 5 Alarm Records serorei meo xpi 4 5 T1 Dial Bac
80. nter maintained during the test indicates the number of bit errors occurring in the network When the tests complete successfully place the circuit in service Verilink 6 5 56K NMS Option Overview The following sections describe the AM2000 screens and procedures for installing and managing the 56K NMS Option Configuring a 56K DDS Module Configuration is similar to that of the standard DIU 2130 except for additional fields relating to alarm thresholds and DDS enable disable The configuration parameters are described below For the default parameter settings for the DIU 2130 DDS see Table 1 CAUTION When you change to 56K DDS mode for a port that has previously been in n x 56 64K mode be sure no more than one time slot is allocated to the port Figure 2 AM2000 Display of Options for DIU 2130 DDS Configuration Screen Enable Alarm Reporting Pressing F8 while the cursor is in this field displays the Alarm Condition Options screen shown in Figure 6 2 DS0 Mode An F8 key is also associated with this field with the following options 56K Select this mode for fractional T1 56K DDS Select this mode to enable the 56K NMS Option mode When you select this option you can assign only one channel to the port See the Caution on the previous page 6 6 Verilink 56K NMS Option Overview 64K This allows fullest use of the channelized data path however to ensure ones density throughout the network the CSU mu
81. on that span which is most likely caused by some device being set for AMI instead of B8ZS On the other hand an AMI T1 does impose certain requirements for ones density which must be met If you have selected 56K mode for the DIU dataports on your AMI T1 then the density requirement has already been met and using either scramble or HDLC inversion is superfluous If you are trying to bend the rules by selecting 64K mode for an AMI T1 and using the Scramble and or HDLC options to minimize density violations then it should be understood that the data pattern may violate AMI standards for ones density and the CSU may occasionally enforce the density rules If a CSU enforces density on a user datastream this will always cause data errors Verilink Tech Support does not recommend use of Scramble or HDLC on AMI circuits Use of Scramble or HDLC on B8ZS circuits is superfluous Use of any of these options in a frame relay environment will always render the T1 inoperative Scramble has nothing to do with encryption Your data is no more or less secure if scramble is on or off When scramble is selected the actual DTE data for that port is run through a mathematical algorithm XOR by 55hex which increases the probability that any particular bit will be a one represented on a T1 as a pulse Use of Scramble absolutely requires use of Scramble at the far end HDLC inversion means that all data is inverted When the DTE sends a one the CSU will s
82. ons you have NOTE To make use of the option you need AM2000 Release 3 2A or higher Preferably you should have the current AM2000 installed before you begin a firmware download of the option However if you do not you can still download the firmware upgrade using an earlier version of AM2000 Preconfigured If you purchased a preconfigured DIU 2130 DDS its EPROM already Option contains the 56K NMS Option All you need do is to install the plug in module and ConnecT 56K DSU s Then configure the element as directed in the subsection Configuring a 56K DDS Module Download If you purchased the downloadable software you can download the Upgrade 56K NMS Option into an existing DIU 2130 using AM2000 The DIU 2130 56K NMS Option can be dynamically configured in the following formats Both ports as standard n x 56 or n x 64 kbit s FTT Both ports as 56K DDS e Port 1 as 56K DDS and Port 2 as n x 56 or n x 64 kbit s FTD Port 2 as 56K DDS and Port 1 as n x 56 or n x 64 kbit s FTD NOTE When you download a firmware upgrade to an existing module the upgrade is loaded into the battery backup RAM and not into the EPROM proper If you disconnect the battery in such a module the firmware reverts to the original firmware in the EPROM Therefore a module upgraded by a firmware download is different from a preconfigured module or one in which the EPROM has been replaced 6 4 Verilink EPROM Upgrade Installation
83. oopback multiplexer 1 6 M Main Menu 2 2 3 3 N NCC 2020 CSU timing 7 13 Verilink Index 1 Index 2 Verilink October 1999 P N 880 503297 001 B VERILINK VERILINK CORPORATION 127 JETPLEX CIRCLE MADISON ALABAMA 35758 TEL 800 837 4546
84. ooting The DIU 2130 DBUs route the DTE data over the backup circuit until the dedicated circuit can be restored When the T1 circuit comes back up the system automatically switches back to the T1 circuit See the Caution in the section Managing Alarms and Testing on page 510 The operator can use AM2000 to manually override the automatic mode setting at any time AM2000 also tracks the status of the switching and the associated alarms and sends test patterns Each DIU 2130 DBU supports one dial backup circuit Both Port 1 and Port 2 are dedicated to the option Port 2 of the DIU 2130 DBU is always the backup circuit Figure 2 diagrams the switched and unswitched modes internal to the DIU 2130 DBU Figure2 Internal State of the DIU 2130 DBU in Normal and Backup Modes of Operation Backplane Bus DIU 2130 DBU NORMAL MODE BACKUP MODE DIU 2130 DBU Port 1 DTE Connection Port 1 Backplane B Port 2 Port 2 SW 56 DSU The DTR control lead of the DCE attached to Port 2 of the DIU 2130 DBU is used to initiate the call to the dial backup circuit The handshake lead Carrier Detect CD is monitored in the answer mode at the central site Backup mode initiates when 1 Loss of Frame is declared for the T1 line LOF is defined as 2 5 seconds 0 5 seconds of Out of Frame OOF integrated therefore applying a leaky bucket algorithm for an intermittent T1 circuit Verilink 5 3 T1 Dial Backup Option
85. ore config Restore the previously saved configuration X exit menu Return to main menu A enable alarm reporting Enables or disables alarm reporting for the plug This includes the standard DIU 2130 alarms as well as the extended DDS alarms for both port 1 and port 2 Verilink 6 19 56K NMS Option Overview DIU 2130 Configuration Diagnostic Menu Options Test Functions 6 20 NOTE DDS alarm thresholds must be set using AM2000 C csu T timing source Dp port Mp mode Sp scramble data Kp clocking Assigns a DIU 2 1 30 to a CSU in the node The CSU must have the A B or C bus enabled Selects the DIU data port that will provide a TT clock as the T1 timing source Assigns channels to the port selected In the DIU2130 mode any number of channels from 1 to 24 can be assigned In the DDS 56K mode only one channel can be assigned from the 24 channels Establishes the data transmission mode 56Kbit s 64Kbit s 56K DDS for the data port selected with the Dp command Scrambles and or Inverts the data in DIU213 0 mode In DDS 56K mode these options are always OFF Selects the proper data input clock for each data port of the DIU Gp LOS lead Detects the lead for Loss of Signal The options are DTR RTS and NONE DTR DSR RTS CTS DCD Ep enable loop Np near loopback Fp far loopback Handshake leads Force handshake leads on Enable a response to loopbacks when any of th
86. orrectly replaced Replace only with the same or equiv alent type recommended by the manufacturer Dispose of used batteries according to the manufacturer s instructions DANGER To avoid electrical shock in case of failure the power supply must be installed by a professional installer The terminal labeled with the ground symbol on the power supply must be connected to a permanent earth ground CAUTION Interconnecting circuits must comply with the requirements of EN60950 1992 A 4 1997 Section 6 2 for telecommunications network voltages TNV circuits ATTENTION Une explosion peut se produire si la batterie est remplac e d une facon incorrecte Remplacez la seulement avec le m me mod le de batterie ou un modele quivalent selon les recommendations de manufacture Disposez de les batteries us es selon les instructions de manufacture ATTENTION Pour viter choc lectrique en cas de insucc s la provision de pouvoir doit tr install par un installeur professionnel Le terminal de la provision de pouvoir mar qu du symbol de terre doit connect un circuit de terre permanent PRUDENT Les circuits doivent tr interconnect s de mani re ce que I quipement continue a tr en agr ment avec EN60950 1992 A4 1997 Section 6 2 pour les circuits de voltage de liaisons d changes r seau par les t l communications TNV apr s les connections de circuits ATTENCION La bater
87. ovides elastic buffering between the data equipment and the DIU to accommodate short term timing differences between them without loss of data Verilink 1 5 DIU 2130 Overview Interface Logic and Loopback Multiplexer Pulse Stuffing Data Scrambler Data Bus Interface Multiplexer and Driver Test Signal Generator Receive Side Functions Data Bus Interface Receiver and Demultiplexer Interface Logic and Loopback Multiplexer 1 6 When handshaking is enabled on the DIU the interface logic processes the handshaking control signals between the data port and the DIU The loopback multiplexer provides a signal loopback on a selected data channel when commanded by the controller If the data port is configured for 56 kbit s or a multiple of this rate the DIU sends the data in the first seven bits of every 8 bit block and transmits aone as the eighth bit This allows a network configured with AMI coding to meet minimum density requirements during normal operation If the data port is configured for 64 kbit s clear channel transmission the data is sent in 8 bit blocks without pulse stuffing on a network configured for B8ZS coding The scrambler feature in the DIU 2130 is not a security feature but rather it uses an algorithm xOR 55h to maximizethe ones density in the data stream The backplane data bus interface multiplexer combines the channelized data from the two data ports into acomposite data signal It places
88. p Option requires the following e Verilink DIU2130 DBU at the central site e Compatible DBU or another DIU 2130 DBU at the far end e ADCE to the dial backup circuit in the form of a dedicated Verilink ConnecT 56K DSU user supplied analog modem or user supplied ISDN BRI DSU device e SW56 analog modem or ISDN BRI circuit available at each end NCC plug in module of Rev 4 6 or higher e AM2000 Release 3 2A or higher installed in a PC connected to the AS2000 Node Controller and Channel Service Unit NCC plug in module AM2000 is used for downloading the upgrade and for configuring and testing of the backup circuit Once the backup is operational you can use the AM2000 for monitoring managing and testing Verilink How dial backup works T1 Dial Backup Option Overview The T1 Dial Backup Option allows a Verilink DIU 2130 DBU to automatically connect both nodes of a circuit to a dial up circuit and switch the Data Terminal Eguipment DTE data to the dial up circuit Events that indicate a circuit failure at the near end are Loss of frame LOF on the TI signal DDS ASC within the channelized data Either nodecan initiate dial backup mode The far end monitors the incoming calls and responds automatically to complete the circuit When both sides are connected the DIU 2130 DBU s switch the Data Terminal Equipment DTE data to the dial backup circuit The dedicated T1 portion of the circuit remains intact for troublesh
89. r RS turned off during alarm CC DSR or DM control lead Yes always on No No follow CD DTR or TR turned off during alarm CF RR or RLSD control lead Yes always on No No follow CD DTR or TR turned off during alarm Data channel loopback enable Yes or No No Timing Unit enable Yes or No No Data equipment clock TT ST or inverted ST ST TT or ST Verilink 3 1 DIU 2130 Configuration Default Description Options Setting Data scrambler Yes or No No disabled DSO channel assignments User defined None CSU shelf and slot number User defined 0 0 Handshake Each DIU 2130 data port also supports handshaking operation Control Leads Table 3 2 lists the handshaking signal options available on the DIU for each data port Table 3 2 Handshaking Control Signal Options Handshake Signals Data Port Handshake Options V 35 RS449 EIA 530 Signal Signal Turned On Turned Off D ipti Directi Set to NO escription irection Set to YES Set to NO RTS RS RTS CA Request to To DIU Forced On Factory Default Send normal mode of operation follows input CTS CS CTS CB Clear to Send From DIU Forced On Factory Default follows conditioned RTS See Note 1 DTR TR DTR Data Terminal To DIU Forced On Factory Default CD Ready normal mode of operation follows input DSR DM DSR Data Set From DIU Forced On Factory Default Ready follows conditioned CC DTR See Note 2 RLSD RR DCD Data C
90. rd Network DS 1 EQUIPMENT DIU DIM Details NCC or TAC XMT DATA EGPT DIU TO FROM NETWORK RCV XMT DATA gt RCV DATA XMT CLOCK RCV CLOCK vv Yvy TO FROM OTHER DIUs In the opposite direction of transmission the CSU passes the incoming T1 signal to the DIUs over data bus A The equipment side multiplexer of the CSU also routes the incoming network signal to the DS1 equipment In addition it inserts all ones idle code bytes into the DSO channel time slots assigned to the DIUs and sends this data to the DS1 equipment Figure 7 14 shows how DSO data is processed during drop and insert toward the network In this example channels 1 to 18 of the signal from the DS1 equipment convey voice channels from the channel bank or P BX Verilink 7 11 DIU DIM Details Figure 7 14 Data Flow for Drop and Insert Toward Network 7 12 ALL ONES BYTES EQUIPMENT DATA NETWORK DATA TO EQUIPMENT 1 19 24 NCC or TAC Be EQPT NET I E ES DROP AND INSERT DATA 18 TO FROM NETWORK 1 19 e i E 19 24 24 Channels 19 to 24 are available for high speed data transmission over the network These six channels are user assigned to a data port of a DIU 2130 connected to the CSU The CSU inserts the high
91. ronized with ST The ST is derived from the T1 transmit clock and is generated using one of one the following timing methods Figure 7 8 Network Loop Timing T1 Bit Stream nternal Timing Master Clock External Timing Station Clock 7 4 Verilink Figure 7 8 Source of Send Timing ST Customer DIU DIM Details Equipment DSU DTE DCE D Buff XMT Butter z S gt l igs er D TIXMT E TT p P ST T A INT Sei sT fea DT Clock Converter Loop Input A RCV Buffer 4 4 RD 4 Clock Recover T1 RCV p 4 RT ST controls the exact bit rate at which data is transmitted toward the network on the DTE interface In loop timing the received T1 signal generates both the RT and ST signals The receive T1 signal is the clock source Figure 7 9 shows the timing signal paths as follows Network Loop Timing Thereceive T1 signal clock is extracted in the CSU clock recovery circuit The clock is converted from T1 frequency 1 544 Mbit s to the lower RT frequency in the DIU This is shown in the clock recovery circuit as fp higher frequency being converted to fj lower frequency In loop timing ST is synchronized with RT The T1 transmit frequency is derived from the T1 receive signal therefore the T1 transmit frequency is identical to the T1 receive frequency Figure 7 9 Loop Timing Customer Equipment DSU OTE DCE Input Buf
92. s are configured properly for operation with the DIUs The following CSU configuration options must be set before use with DIUs DIU Data Bus Assignment DIU Timing Mode Configure the DIU module before connecting its DIM to the customer data equipment The cables required for DIU connection to the customer data equipment depend on the type of interface selected RS 449 V 35 or EIA 530 and the data equipment configuration which can be either DTE data terminal equipment or DCE data communication equipment The DIU 2130 is always in a DCE configuration For this example an SCC 2020 is used with a DIU 2130 module in the right side slot 2 of a Dual Line Shelf The SCC 2020 connects directly to the T1 circuit and provides CSU functionality The DIU 2130 presents two synchronous serial interfaces for connecting the Data Terminal Equipment DTE and provides DSU functions Verilink 2 1 DIU 2130 Quick Set up Before any module may be configured it must first be selected When you first logged in the default was that the controller module in this case the SCC was selected To configure the DIU 2130 first select it using the Shelf Slot command S from the controller module s Main Menu Figure 2 1 Figure 2 1 SCC 2020 Main Menu VERILINK SCC NODE CONTROLLER at 1 1 FW Rev 2 06 Jan 15 1998 FLASH BANK B Serial Number 00435509 Ethernet Address A0 64 00 06 45 35 Slip Local IP Address 192 94 46 222 Subnet Ma
93. s common case of tail circuit timing where a dataport is being connected via a crossover cable to another DCE a dataport may be selected as the input source for timing Verilink 3 7 DIU 2130 Configuration Command Options Timeslots All timeslots from 1 to 24 are listed across the screen on the eighth line of the display Below this line beneath each timeslot the dataport to which that timeslot is assigned is indicated Thus for each of the timeslots 1 through 24 either al a 2 or a pair of dots indicating unassigned will be shown For example chnl 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Dpjport 01 01 01 01 02020202 ro In this example timeslots 1 through 4 are assigned to the first DIU 2130 dataport and timeslots 9 through 12 are assigned to dataport 2 To assign timeslots to the dataports use the command Dp however do not use the lowercase p Instead use either a 1 or a 2 in place of the lowercase p The lowercase p is used as a variable Multiple timeslots are entered by separating the numeric values with acomma or a minus sign In the example below the first twelve timeslots are assigned to dataport 1 1 2 DIU 2130 gt d1 enter port 1 channels gt 1 12 1 2 DIU 2130 UPDATE gt DTR Data Terminal Ready a control lead presented by the DTE Data Terminal Equipment The Verilink DIU 2130 is DCE Data Communications Equipment
94. s in the DIU 2130 for each of the following DDS status codes Abnormal Station Code ASC Control Mode Idle CMI e MUX Out Of Sync MOS Unassigned MUX Channel UMC The following items are grouped together and associated with one common threshold setting The AM2000 autonomously receives alarms whenever one of the configured DDS status code thresholds is crossed MJU Alert MA Test Alert TA Test Code Block Code BLK Release Code RLS For more information on alarms see the section Managing Alarms below Use the 56K NMS Option to send the following loopback codes to far end DDS DSUs ITU T V 54 most useful in DDS mode e DDS latching loopbacks OCU Channel DSU When you have the loopbacks established you can send 511 and 2047 test patterns over them The 56K NMS Option is available as a factory order in three configurations e Plug in module designated DIU 2130 DDS e EPROM upgrade kit to an existing DIU2130 e APA download upgrade kit for an existing DIU2130 The software upgrade version is downloadable using the AM2000 Verilink 6 3 56K NMS Option Overview Compatibility The following revision and release levels are required to run the and 56K NMS Option Requirements NCC plug in module of Rev 4 6 or higher e AM2000 Release 3 2A or higher Upgrading to the 56K NMS Option This section describes how to install your option depending on which of the available configurati
95. sk 255 255 255 0 Ethernet Local IP Address 192 94 45 242 Subnet Mask 255 255 255 0 SITE NAME Tech Pubs SCC 2020 NODE ID 12 lt SLOT gt SHELF 1 2 3 4 5 6 7 8 9 10 11 12 13 1 DL C D 2 3 4 KEY C CSU D DIU F DIU DDS R SRD I IDCSU T TU A APS B DIU DBU S SMDS L HLM S shelf slot D diagnostics N near element 0 node administration F far element M monitor alarms OFF C configuration A view alarm buffer P performance X log off 1 1 NEAR TAC 2010 The S shelf slot command is used to navigate from one module to another Type S and press ENTER The prompt for selecting another module displays Enter shelf slot gt For this example the node has only one shelf shelf 1 and the DIU 2130 is in slot two of that shelf Enter 1 2 and press ENTER The prompt line returns as 1 2 DIU 2130 UPDATE gt This indicates that the DIU 2130 has been selected Type C and press ENTER to select the DIU 2130 configuration menu NOTE Whenever the word UPDATE appears in the command line prompt it indicates that some information has changed since the screen was last refreshed To refresh the screen with current information press ENTER by itself 2 2 Verilink Configuration Menu DIU 2130 Quick Set up There is a brief delay as the SCC module tries to communicate with a CSU module in Shelf 0 Slot O since this is the default value for CSU assignment in a new D
96. speed data onto channels 19 through 24 of the signal from the eguipment and then sends the composite signal to the network Incoming from the network the CSU drops the incoming composite DS1 signal to the DIU 2130 The high speed data on channels 19 to 24 is extracted by the DIU and routed to the customer data equipment The data on channels 1 through 18 of the incoming network signal continues through the CSU to the DS1 equipment The CSU also sends all ones on channels 19 to 24 toward the equipment For through timing with drop and insert toward the network the receive DIU clock is derived from the incoming network signal and applied to the DIUs via data bus A Figure 7 13 The DIU transmit clock and the CSU transmit clock to the network are similarly derived from the incoming signal from the equipment The transmit and receive clocks are applied to the DIUs via Data Bus A Verilink CSU Timing Through Timing Loop Timing Network Timing DIU DIM Details When a CSU is used with DIUs the associated DIUs must be timed from areference clock source The CSU synchronizes itself with the DIUs by deriving two separate timing signals transmit and receive clocks from the reference clock source It sends these signals to the DIUs over the assigned data bus To support various T1 network applications the Access System 2000 offers several operator selectable system timing options These options are Through timing Internal t
97. st be optioned for B8ZS As with 56K mode multiple channels of the T1 can be allocated to each DIU port at this rate Loop Pressing F8 while the cursor is in this field displays the Loop Definition Options screen described in Managing Loopbacks Scramble This function is disabled in 56K DDS mode The user interface will allow you to set it but it is not supported Invert Tx HDLC Invert This function is disabled in 56K DDS mode It inverts the user data to from the DS1 connection and can be used to aid density enforcement with certain protocols The default configuration parameter settings for the DIU 2130 DDS are listed in Table 1 Table 1 DIU 2 130 DDS Configuration Default Settings OPTION DEFAULT Installed and operational No Save configuration to DIU No Enable alarm reporting No ASC Threshold 0 seconds CMI Threshold 0 seconds MOS Threshold 0 seconds UMC Threshold 0 seconds Group 1 DDS Codes Threshold 0 seconds Alarm when looped Yes Alarm when sending test pattern Yes Alarm clear Delay time 15 seconds Connected CSU shelf 0 Connected CSU plug 0 For each port Channel Assignment unassigned EQP Name blank EQP SER blank EQP Interface blank EQP Speed blank DSO mode 64K Enable Loops Y Loop on received DDS code DSU Detect DTE LOS No Verilink 6 7 56K NMS Option Overview Table 1 DIU 2 130 DDS Configuration Defaul
98. t Settings OPTION DEFAULT Select loop type on RL lead V 54 Enable Scramble No Enable Invert Disabled in DDS mode No EQP Clock ST Force DTR No Force RTS No Force DSR No Force CTS No Force DCD No Enable as TIU No Status Monitoring Monitor the 56K DDS circuit by either of the following alternatives e Await the autonomously generated alarms to arrive indicating a fail ure in the circuit e Periodically retrieve the element status to view the performance of the circuit Viewing the circuit status is available from the On line Access Element Status menu When you select DIU 2130 DDS the screen shown in Figure 3 is displayed 6 8 Verilink 56K NMS Option Overview Figure 3 AM2000 Display of DIU 2 130 DDS Status The fields displayed in Figure 3 are described as follows Near End Looped Indicates whether a bidirectional loopback is activated for that port Far End Looped When set toYes indicates that the far end device responded successfully to in band loop code transmission Sending Test Pattern Indicates that the port is sending a test pattern in the configured channel s of the T1 signal Possible values for this field include NO No test pattern is currently being generated VERILINK Indicates that theVerilink test pattern is being generated 511 Indicates that the 511 test pattern is being generated 2047 Indicates that the 2047 test pattern is being
99. th to DIU cards 1 NONE The CSU is in CSU mode This means that all 24 timeslots are being passed directly through the CSU to an attached DSX 1 T1 device often used for PBX or telephone switch applications Note that in CSU mode only the DIU clock option is not in effect the actual behavior of the card is passive as regards timing when CSU mode is selected 2 A The CSU is in mux mode and it is using bus A to pass data back and forth to the associated DIU card s The equipment interface is not in use in mux mode 3 B The CSU is in mux mode and it is using bus B to pass data back and forth to the associated DIU card s The equipment interface is not in use in mux mode 4 C The CSU is in mux mode and it is using bus C to pass data back and forth to the associated DIU card s The equipment interface is not in use in mux mode 5 B D amp l EQ The CSU is in a very rarely used mode Tech Support has never seen it used in which the DIU data traffic is being routed out the DSX 1 T1 equipment port to the local T1 equipment instead of out the T1 network port This is called the drop and insert toward the equipment Unless your requirement is exceptionally unusual do not select 5 B D8l EQ Verilink 3 15 DIU 2130 Configuration DIU Clock 6 A D amp I NET The CSU is in drop and insert mode and both the T1 equipment port and a DIU are in use These options determine the source for the TRANSMIT clock that is used by th
100. the data on the operator assigned shelf data bus for T1 network transmission over the assigned channel time slots The backplane interface driver converts the outgoing data to the RS 422 signal levels required by the assigned data bus When activated the test code generator substitutes a four bit pseudorandom bit sequence PRBS signal with a pattern of varying ones and zeros for the normal data on the selected channel This signal is used for end to end circuit bit error testing The receive side extracts the incoming data from the associated CSU demultiplexes the data and sends it to the connecting customer data equipment The backplane data bus interface receiver converts the incoming data and clock signals to the format required for data demultiplexing The demultiplexer reads the framing data from the incoming DS1 signal and derives the channelized data signals for the customer equipment ports The interface logic and loopback multiplexers operate as previously described for the transmit side of the DIU The clock and data outputs of the interface logic are applied to the interface driver in TTL format Verilink DIU 2130 Overview Descrambler The DIU s receive side logic multiplexer contains a descrambler If the DSO customer data is scrambled at the transmitting end the descrambler restores the original data before sending it to the data equipment Table 1 1 Scramble Option Status Point A Point B Vali
101. tuations Repairs to certified equipment should be made by an authorized Canadian maintenance facility designated by the supplier Any repairs or alterations made by the user to this equipment or equipment malfunctions may give the telecommunications company cause to request the user to disconnect the equipment Users should ensure for their own protection that the electrical ground connections of the power utility telephone lines and internal metallic water pipe system if present are connected together This precaution may be particularly important in rural areas Caution Users should not attempt to make such connections themselves but should contact the appropriate electric inspection authority or electrician as appropriate This equipment is intended to be installed only in a Restricted Access Location that meets the following criteria Access can only be gained by service personnel or users who have been instructed about the reasons for the restrictions applied to the location and about any precautions that must be taken Access can only be gained through the use of a lock and key or other means of security and is controlled by the authority responsible for the location When handling this equipment follow these basic safety precautions to reduce the risk of electric shock and injury Follow all warnings and instructions marked on the product and in the manual Unplug the hardware from the wall outlet before cleanin
102. ure 1 Features Status Control Codes 6 2 Example Configuration of the 56K NMS Option managing four remote DDS circuits 4 WIRE DDS Central Office RS 232 AS2000 Multiline shelf PC compatible The routers are each connected to the network by ConnecT 56K DSUs Each port of aDIU 2130 DDS supports one ConnecT 56K DSU The 56 kbit s CSU DSU circuits are multiplexed in the central office and passed on to the AS2000 node on a T1 or FT1 circuit This is a common cost effective approach for terminating 56K circuits in a central site The AM2000 accesses the DDS circuits through the Verilink Node Controller and Channel Service Unit NCC 2020 In this section the 56K NMS Option features are grouped as follows e status codes alarms e loopback codes The 56K NMS Option allows the AM2000 to display the following DDS status control codes received by the DIU 2130 DDS e Abnormal Station Code ASC e Control Mode Idle CMD e MJU Alert MA Test Alert TA e MUX Out Of Sync MOS e Unassigned MUX Channel UMC Test Code TC Channel loopback CHNL DSU loopback DSU Verilink Alarms Loopback Codes Available DIU 2130 DDS Configurations 56K NMS Option Overview e OCU loopback OCU Transition in Progress TIP e Block Code BLK Release Code RLS If no control code is being received the raw data is displayed The 56K NMS Option configures individual alarm threshold
103. user manual for more information Within 15 seconds of connecting the T1 circuit the NET LED on the front of the controller module should change from red to green If it does not the Diagnostics Menu of the controller module may be used for troubleshooting Verilink 2 5 DIU 2130 Quick Set up 2 6 Verilink Chapter Configuration Options and DIU 2130 Configuration Before configuring a DIU 2130 verify that A data bus has been assigned to the CSU of the associated NCC SCC or TAC This bus conveys customer data between the DIUs and the CSU during normal operation The proper DIU timing mode has also been selected on the associated CSU Table 1 1 provides the DIU 2130 configuration options and factory default settings These settings allow the DIU to interface properly Default Settings with the customer equipment and the associated CSU for T1 network transmission The DIU 2130 is shipped with the default settings listed in the table Table3 1 DIU 2130 Configuration Options and Default Setting Default Description Options Setting Data port speed 56 kbit s to 1 536 Mbit s in multiples of 56 or 64 kbit s Data mode 64 kbit s Yes or No No 56 kbit s CA RTS or RS control lead Yes forced on No No follow DTE input CD DTR or TR control lead Yes forced on No No follow DTE input CB CTS or CS control lead Yes always on No No follow CA RTS o
104. vating the leads Access Manager and the ASCII Terminal Interface offer the following settings for this feature RTS Sends an alarm notification upon the loss of RTS on the DTE interface DTR Sends an alarm notification upon the loss of DTR on the DTE interface None Does not send any notification upon loss of RTS or DTR If a test signal is applied by the DIU to the selected data channel and is looped back at the far end DIU the test signal detector looks for bit errors in the returned signal If errors are detected the STAT LED for that data port flashes red and yellow on the DIU front panel If no errors are detected this LED lights yellow The DIU 2130 provides a data channel loopback to help isolate data channel failures Figure 4 1 shows this loopback When this loopback is activated by a test operator it provides two simultaneous connections Onetoward the data equipment Onetoward the network On the equipment side the data equipment transmitter is connected to the receiver through the DIU interface driver and receiver circuits This path allows the operator to verify operation of the customer data equipment and the associated interface cabling to the DIU Verilink Troubleshooting When a data channel loopback is activated the incoming channel data from the network is looped back toward the far end This path allows end to end channel testing of the data circuit through the network and associated DIU a
105. view Used with the Verilink ConnecT 56K Data Service Unit DSU the 56K NMS Option allows Access Manager 2000 AM2000 to manage remote Dedicated 56K circuits Management features include alarms based on DDS Digital Dataphone Service control codes 56K circuit compatible loopbacks and monitoring of the circuit data With the 56K NMS Option you can manage remote Verilink ConnecT 56K DSUs including the following Monitor DDS control code information per AT amp T TR 62310 e Identify and manage alarms on DDS control codes Send 56K loopback signals and test patterns Monitor circuit data The 56K NMS Option is available as an EPROM upgrade or Verilink download upgrade to an existing DIU 2130 plug in module The resulting plug in module designated DIU 2130 DDS is also available from the factory You can also use AM2000 to install the APA download upgrade kit for an existing DIU 2130 if you have purchased that configuration of the 56K NMS Option You can also do configuration and testing using a dumb terminal connected to the ASCII interface of the DIU 2130 DDS NOTE The 56K NMS Option is an enhancement to the existing functionality of the DIU 2130 You can configure each port of a DIU 2130 DDS for either 56K DDS service or standard FT1 service Figure 1 shows an application in which traffic from four remote routers is networked to a router at an AS2000 central site Verilink 6 1 56K NMS Option Overview Fig
106. wer the data rate of the port and the shorter the cable from the DTE to the DIU port the greater the chance that ST will be the optimum setting If INV ST is selected the DIU 2130 will sample the transmit data lead during the positive going transition of the transmit clock signal This is one half of a clock cycle later than the negative going transition which is used for ST The INV ST option is used in order to compensate for delay in the DTE itself and or especially delay caused by the length of the DTE to DIU cable With higher data rates longer cables or the combination of high data rate and a long cable the probability that INV ST will be the best option to choose increases Factors such as cable capacitance per foot inductive reactance in the cable conductor thickness gauge and especially cable length will all factor in to the phase relationship between the transmit clock signal being sent by the DIU and the transmit data arriving at the DIU transmit data leads There are too many variables and too many unknown factors to be able to make hard and fast rules for selecting the choice between ST and INV ST If the ideal selection has been made then the DIU 2130 will always be sampling the transmit data lead near the middle of each transmit data bit This insures that the DIU 2130 will correctly sense whether the DTE has presented a one or a zero during that bit time and no sampling errors will occur Verilink 3 11 DIU 2130 Conf
107. y Controlling Dial Backup T1 Dial Backup Option Overview Table2 Dial Backup Alarm Codes for DIU 2 130 DB Alarm Code Alarm Description 853 Backup connection activated alarm 854 Backup connection activated alarm cleared 855 Backup connection failed alarm If you do not want the automatic backup feature to take effect you can manually disable the automatic mode see Configuring Modes for Dial Backup You can then manually force Port 1to connect to Port 2 dial backup mode as shown in this section You may want to do this for diagnostic purposes See Managing Alarms and Testing Inthe AM2000 these activities are located in the online Test Activity menu as shown in Figure 5 2 Table 5 2 Test Activity Menu Testing Before or After a T1 Circuit Failure The dial backup options include Activate backup connection This breaks the connection to the T1 backplane bus and switches Port 1 to Port 2 See Figure 2 Deactivate backup connection This option breaks the connection to the backup port and re establishes the connection to the T1 backplane See Figure 2 When you have the backup circuit activated you can test it by selecting items A and B on the Select Test Activity menu shown in Figure 5 2 Send Test Pattern sends athe loop code or test pattern to the far end to verify that a dedicated circuit is operating satisfactorily Verilink 5 11 T1 Dial Backup Option Overview CAUTION
108. y module may be configured it must first be selected When you first logged in the default was that the controller module in this case the SCC was selected To configure the DIU 2130 first select it using the Shelf Slot command S from the controller module s Main Menu Figure 3 1 Figure 3 1 SCC 2020 Main Menu VERILINK SCC NODE CONTROLLER at 1 1 FW Rev 2 06 Jan 15 1998 FLASH BANK B Serial Number 00435509 Ethernet Address A0 64 00 06 45 35 Slip Local IP Address 192 94 46 222 Subnet Mask 255 255 255 0 Ethernet Local IP Address 192 94 45 242 Subnet Mask 255 255 255 0 SITE NAME Tech Pubs SCC 2020 NODE ID 12 lt SLOT gt SHELF 1 2 3 4 5 6 7 8 9 10 11 12 13 1 DL C D 2 3 4 KEY C CSU D DIU F DIU DDS R SRD IDCSU T TU A APS DIU DBU S SMDS L HLM S shelf slot N near element F far element C configuration P performance 1 1 NEAR TAC 2010 D diagnostics 0 node administration M monitor alarms OFF A view alarm buffer X log off Verilink 3 3 DIU 2130 Configuration 3 4 Configuration Menu The S shelf slot command is used to navigate from one module to another Type Sand press ENTER The prompt for selecting another module displays Enter shelf slot gt For this example the node has only one shelf shelf 1 and the DIU 2130 is in slot two of that shelf Enter 1 2 and press ENTER The prompt line returns as 1 2 DIU 2130 UPDATE
109. yed both STAT LEDs NOTE If the STAT LED has a low battery alarm and a loss of signal alarm at the same time the LED will flash in the following order Solid Green 6 sec 2 Red Flashes Out 2 sec 3 Red Flashes repeated e Green DIU is working properly normal operation Flashing Green DIU is accessed by a master NCC or SCC thumbwheel switch Both the PORT 1 and PORT 2 STAT LEDs flash green during this time Red DIU is faulty or problem in equipment connections Replace the DIU Verilink 4 1 Troubleshooting Loss of Clock Alarm Notification Loss of Signal Alarm Notification Test Signal Detector Data Channel Loopbacks 4 2 Amber Associated data channel is under test by an operator a test signal is being applied by the DIU Flashing Red Power up self test failure Flashing Red and Amber DIU has failed an operator initiated data channel test Not Lit DIU is not powered up power is lost If the DIU 2130 detects loss of clock it will send an alarm to the management software and activate an LED indicator The following loss of clock sources can be detected upon failure TIU 2850 AMI TTL or RS 422 e NCC 2020 or TAC 2010 External TTL and RS 422 DIU 2130 Tail circuit timing A loss of signal alarm will be sent to the management software when the DIU 2130 detects the loss of RTS or DTR handshake leads via the cable becoming disconnected or the DTE deacti

Verilink DIU 2130 User Manual

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