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1. Revision 3 11 2000 85 SZ DOC W2E 3 pdf LTU NTU Version 1 2 Operating Manual 11 3 Environment 11 3 1 Climatic Conditions Storage ETS 300 019 1 1 Class 1 2 25 C 55 C Transportation ETS 300 019 1 2 Class 2 3 40 C 70 C Operation ETS 300 019 1 3 Class 3 2 5 C 45 C ETS 300 019 1 3 Class 3 3 259C 55 C only for REG 11 3 2 Safety According to EN 60950 11 3 3 EMC According to EN 300386 2 11 4 Physical Dimensions 11 4 1 LTU 19 Plug in unit height 259mm 6 HE width 30mm Minirack LTU height 43 5mm width 483mm depth 230mm PCB dimensions height 233 35mm length 220mm 11 4 2 NTU Tabletop unit width 220mm depth 195mm height 43mm Minirack NTU height 43 5mm width 483mm depth 230mm 86 Revision 3 11 2000 LTU NTU SZ DOC W2E 3 pdf Operating Manual Version 1 2 12 Diagnostics and Troubleshooting 12 1 Test Loops Standard Test Loops The test loops can be activated via the monitor interface for both the master and the slave side However only one test loop can be activated at any one time Activation of a further test loop will deactivate the previous loop A system reset will deactivate any pending test loop Slave Master A Loop 1 Loop 2 User Interface User Interface Figure 12 20 Standard Test Loops Notes e On the slave side Loop 1 can only be activated locally while Loop 2 can only be activated
2. The El framer operates in Common Channel Signaling CCS mode Time slot 16 and all national bits are fully transparent Consider the CRC4 and E bit Insertion options when operating in framed mode 4 2 1 2 1 CRC4 If operating in framed mode the CRC4 option can be used to adapt to specific El network requirements e If enabled the El framer will synchronize on CRC4 multiframes and CRC4 errors will be reported In the outgoing El signal the framer regenerates the CRC4 multiframe alignment and checksum words The A Bit and the Sa Bits pass transparently e If disabled the international bits are set to 1 in the outgoing El signal All national bits are fully transparent On the receive side the El framer will synchronize on basic frames only and no CRC4 errors will be reported 4 2 1 2 2 E bit Insertion e If automatic E Bit generation is enabled detected CRC4 errors will cause the assertion of the E bits e If disabled all E Bits are set to 1 Revision 3 11 2000 11 SZ DOC W2E 3 pdf LTU NTU Version 1 2 Operating Manual 4 2 2 AIS Generation If this option is enabled an unframed AIS all ones will be transmitted on the El side irrespective of whether the system is configured in transparent or framed mode AIS generation will be activated on the following conditions e DSL link to the remote station is not established loss of signal or loss of frame alignment on DSL side or e remote stati
3. 10 ITU T G 703 Physical Electrical Characteristics of Hierarchical Digital Interfaces 11 ITU T G 704 Synchronous Frame Structures Used at Primary and Secondary Hierarchical Levels 12 ITU T G 821 Error Performance of an International Digital Connection Forming Part of an Integrated Services Digital Network 13 ITU T G 823 The Control of Jitter and Wander within Digital Networks Which Are Based on the 2048 kbit s Hierarchy 14 ITU T G 826 Error Performance Parameters and Objectives for International Constant Bit Rate Digital Paths at or above the Primary Rate 15 ITU T G 962 Access Digital Section for ISDN Primary Rate Access at 2048 kbit s 16 ITU T 1 604 Application of Maintenance Principles to ISDN Primary Rate Accesses 17 ITU T K 20 Resistibility of Telecommunication Switching Equipment to Overvoltages and Overcurrents 18 ITU T K 21 Resistibility of Subscribers Terminals to Overvoltages and Overcurrents 19 ITU T V 10 Electrical Characteristics for Unbalanced Double Current Interchange Circuits Operating at Data Signaling Rates Nominally up to 100 kbit s 20 ITU T V 11 Electrical Characteristics for Balanced Double Current Interchange Circuits Operating at Data Signaling Rates up to 10 Mbit s Revision 3 11 2000 93 SZ DOC W2E 3 pdf LTU NTU Version 1 2 94 Operating Manual 21 ITU T V 24 List of Definitions for Intercha
4. 4 3 ISDN PRA Interface r aara ar eA An eaa EAA ANA Daa Er AAAA ae A Aa Ernane Ae Tinerii 18 434 PRA MOde ss AS lise ik dwan STAN I AGAN TAJ 19 4 3 2 CRC4 Processing Options se aaa nana anane anan anana nana a nan 19 4 3 2 1 Digital Link without CRC Processing Option 1 19 4 3 2 2 Digital Link with CRC Processing in the NT1 Option 2 20 4 3 2 3 Digital Link with CRC Processing in the LT and NT1 Option 3 22 4 3 2 4 Digital Link with CRC Monitoring in the NT1 Option 4 22 4 3 3 Generation of CRC4 Error Notifications to the ET 23 Revision 3 11 2000 V SZ DOC W2E 3 pdf LTU NTU Version 1 2 Operating Manual 4 4 gt mxoedkbit s Interface beni po anga kon aa 24 4 4 1 Fe atureSs n ure eee E e reete lu kell en len 24 44 2 Gontigulation c esiu tip keen i as De median 25 4424 hime Slot Mappirig eco 2a 25 4 4 2 1 1 Terminology ee E POR ERR esta E ae 25 4 4 2 1 2 n x 64kbit s Time Slot Mapping seem 25 4 4 2 1 3 E1 Tim Sl t Mapping asii aas narada sa aaa aa a Ng IN aa a AS ih 26 4 4 2 2 User Interface Type aaaaaan aranana anana aana nana aana nana nnne rne nnns 26 4 4 2 3 Bit Rate au krede vee da e beo C tede aana aa t a ndang gasak 26 4 4 2 4 Clock Mode eee anae nana ee aaatotasasaoaeeeasosotosoooo
5. Security management is not supported 8 4 Monitor Commands for the n x 64kbit s Interface This section deals only with n x 64kbit s specific monitor commands 8 4 1 Fault and Maintenance Management FMM 8 4 1 1 ALARM Command NTU_FMM gt ALARM DTR 1 on OS DTR 2 off OS LFA LOC off NTU FMM These alarms are related to the n x 64kbit s interface DTR Status of DTR Data Terminal Ready Handshake Signal For X 21 the Control signal C is represented by DTR DTR Signal is detected as ON Status off DTR Signal is detected as OFF Status on Revision 3 11 2000 59 SZ DOC W2E 3 pdf Version 1 2 LOC LTU NTU Operating Manual Loss Of Clock When Local Clock mode is selected LOC is also active when the incoming clock bit rate is not equal to the programmed bit rate n Clock master present with correct bit rate Status off Clock master not present and or bit rate mismatch Status on 8 4 2 Configuration Management CM NTU_CM gt H CONFIG BITRATE nl n2 CLOCKMODE 0 3 CLOCKDIR dirl dir2 V54LOOPS ON OFF UIF V35 V36 X21 MASTER ON OFF RESTART ON OFF DEFAULT 0 2 M AIN NTU CM 8 4 2 1 CONFIG Command The CONFIG command displays the configuration of the NTU unit e g V 35 NTU CM CONFIG Display local configuration Set bitrate n x 64 kbit s of Port 1 and 2 nl n
6. Select if circuit B for byte timing is used in X 21 mode Note that to use the byte timing you need the appropriate cable and cannot use the codirectional transmit clock 8 4 2 7 UIF Command Select the interface type V35 V 35 V36 V 36 X21 X21 8 4 2 8 DEFAULT Command The DEFAULT command sets a default configuration Three default settings are available for the n x 64kbit s interface NTU CM DEFAULT 0 Local Configuration Id nx64 kbit s V 35 Ved Bitrate Port 1 Ort Bitrate Port 2 LOFE Clock Mode Remote Clockdir Port 1 Contradirectional Clockdir Port 2 Contradirectional V 54 Loops Disabled HDSL Master Slave Slave Autorestart Enabled Operating Mode Normal Channel A e On Channel B On NTU_CM gt Revision 3 11 2000 61 SZ DOC W2E 3 pdf Version 1 2 NIU CM DEFAULT 1 LTU NTU Operating Manual Local Configuration V39 Bitrate Port 1 Bitrate Port 2 Clock Mode Clockdir Port 1 Clockdir Port 2 V 54 Loops HDSL Master Slave Autorestart Operating Mode Channel A Channel B Off off Internal Contradirectional Contradirectional Disabled Slave Enabled Normal On On NTU_CM gt DEFAULT 2 Local Configuration V35 Bitrate Port 1 Bitrate Port 2 Clock Mode Clockdir Port 1 Clockdir Port 2 V 54 Loops HDSL Master Slave Autorestart Operating Mode Channel A Channel B Off Off Remote Contradirection
7. Channel B On NTU CM The factory setting can be loaded using the DEFAULT 2 command All DSL LTUs and NTUs are delivered with this configuration LTUs as master NTUs as slave Note The Master Slave and Remote Powering settings are not affected by the DEFAULT Command 8 3 3 4 REMOTE Command The REMOTE Command enables the remote configuration LTU 01 CM REMOTE 11 32 50 remote configuration activated Type H and the monitor lists all the available commands on the remote side LTU 01 CM REMOTE H CONFIG Display remote configuration G704 ON OFF Set framed mode transparent mode CRC4 ON OFF Set CRC4 mode on off EBIT ON OFF Set automatic E Bit insertion on off 58 Revision 3 11 2000 LTU NTU Operating Manual SZ DOC W2E 3 pdf Version 1 2 AISGEN ON OFF Set AIS generation on off AISDET ON OFF Set AIS detection on off UIF E1 PRA Set user interface typ COPY Copy local configuration to remote station OCA Return to local configuration M AIN Return to main menu LTU_01_CM_REMOTE gt Note The REMOTE command is only possible from master side 8 3 3 5 COPY Command The COPY command sets the remote configuration equal to the local 8 3 3 6 LOCAL Command The LOCAL command switches back to the local configuration 8 3 4 Accounting Management AM Accounting management is not supported 8 3 5 Security Management SM
8. Control Q which is XON and ECHO to re enable communication to LTUs occasionally left in XOFF state Try selecting the modem using Yon n being modem address See chapter Monitor Check baud rate of PC Try typing lt Control Q gt which is X on and lt ECHO gt Check configuration Do not configure the E1 interfaces at both ends to use the receive clock as transmit clock except if one DSL equipment is an LTU using the External Clock option Otherwise there will be no defined clock If both system units are configured as master or as slave no start up will occur To identify the master unit check if both LED s are lit ON The slave has only the local LED turned on Check that you use twisted pair cables till to the end of DSL RJ 45 connector Do not use other cable types as twisted pairs 89 LTU NTU Operating Manual SZ DOC W2E 3 pdf Version 1 2 13 Appendix 13 1 Abbreviations 2B1Q ACO ACU AIS AIS R AIS S BER H BER L BER S CAP CCITT CCS CMU CRC DSL El ET EOC ESR FAS FC FEBE frE1 HDSL HRP Revision 3 11 2000 2 Binary 1 Quaternary Alarm Cut Off Alarm Control Unit Alarm Indication Signal Alarm Indication Signal Alarm bit in DSL frame Alarm Indication Signal Subscriber Block Error Rate High 2 30 according G 826 Block Error Rate Low gt 15 amp 30 according G 826 Excessive Block Error Rate CRC 4 Errors gt 805 on Subscriber Carrierless Amplitu
9. REG R A 19 5 B 19 5 REG C A 19 5 B 19 0 dB EGI noise margin REG R A 19 5 B 19 5 REG C A 19 5 B 19 5 dB EGI noise margin REG R A 19 0 B 19 0 REG C A 19 5 B 19 0 dB LTU 04 FMM SQ REGI 05 11 70 regenerator 1 signal quality trace off LTU 04 FMM Note This command is available on LTU R only It periodically reads the signal quality from the regenerator via EOC If no valid signal quality value was communicated from the regenerator to the master since the last trace output will appear instead of a signal quality value Also the activation of the regenerator loopback will force the REG C values to appear as 8 3 2 3 STARTUP Command 46 The STARTUP command allows the user to turn the startup trace on and off in order to observe the LTU and NTU activation state diagram transitions The activation state diagram transitions are conforming to ETSI TS 101 135 Note that in case of a regenerated DSL link no activation state diagram transitions for the regenerator NTU link can be monitored LIU 04 FMM STARTUP 00 03 60 HDSL transceiver startup trace on 00 03 60 A INACTIVE transmit SILEN 00 03 60 B INACTIVE transmit SILEN 00 03 80 A ACTIVATE 1 transmit SO 00 03 80 B ACTIVATE 1 transmit SO 00 05 80 A ACTIVATE 2 signal detected 00 05 80 B ACTIVATE 2 signal detected 00 15 90 A ACTIVATE 3 transmit S1 0
10. Software failure blinking off Normal operation Master mode green green Normal operation Slave mode green off Non urgent alarms Local remote amber amber off for slave Urgent alarms Local remote red red off for slave Regenerator alarm or Loopback amber red Master mode 6 1 2 Alarm Conditions 6 1 2 1 Local LED An alarm condition is displayed with the Local LED if one of the following conditions occurs Urgent alarm red e Hardware or software failure blinking e Loss of signal frame alignment on the DSL side depending on the DSL operating mode Revision 3 11 2000 31 SZ DOC W2E 3 pdf LTU NTU Version 1 2 Operating Manual DSL operating mode Alarms Normal LOS LFA A or LOS LFA B Fractional LOS LFA A Partial LOS LFA A and LOS LFA B Hot Standby LOS LFA A and LOS LFA B e DSL block error rate according G 826 gt 30 BER H BER REG H e LTU only overcurrent detected in remote power feeding circuit CLDET A CLDET B Non urgent alarm amber e DSL block error rate according G 826 gt 15 BER L e Either Loop 1 Loop 2 Analog Loopback or the Regenerator Loopback is active LOOP1 LOOP2 ALB LOOPREG e Receiving regenerator alarm REG A REG B indicating second section REG NTU has not yet started and or Regenerator Loopback is active Master mode e Alarm cut off is activated ACO E1 Interface e Loss of signal or frame alignment on the El side LOS
11. and Non urgent are located on the NTU the alarm contacts are available on the monitor connector Revision 3 11 2000 33 SZ DOC W2E 3 pdf LTU NTU Version 1 2 Operating Manual 6 2 2 1 Alarm Conditions 34 Note Urgent Alarm e At least one of the NTU LEDs is red Non urgent Alarm e At least one of the NTU LEDs is amber and none of the NTU LEDs is red If alarm cut off is activated ACO on the alarm relays are disabled Revision 3 11 2000 LTU NTU Operating Manual 7 1 LTU SZ DOC W2E 3 pdf Version 1 2 7 Power Concept 7 1 1 Power and Grounding 7 2 NTU Each plug in LTU is fed via subrack backplane with dual 48Vpc referenced to OVpc of the exchange battery whereas the minirack LTU is fed via an internal power supply unit The LTU generates the used voltages onboard The ground reference of all voltages on the secondary side of the LTU s DC DC converter are tied to FPE Functional Protective Earth Additionally the plug in LTU is fed over the backplane with an auxiliary 5Vpc supply referenced to ground generated on the ACU The only purpose of this voltage is to drive the alarm circuitry on each LTU even in the case of a failure of the LTU s onboard DC DC converter In case of a failure of the LTU s onboard power supply both LEDs on the front panel will be extinguished 7 2 1 Power and Grounding The ground of an NTU is typically floating when referenced to earth If
12. e g loss of power at NT1 or FC4 Therefore this Sa6 bits indication can be disabled e If the CRC4 error notification in Sa6 is enabled Sa6 0001 indicates an E bit received from the NT2 TE Sa6 0010 indicates a CRC4 error detected at the T reference point of the NT1 and Sa6 0011 indicates the simultaneous occurrence of both errors e If disabled Sa6 is always 0000 in normal operation state As sending of Sa bits requires regeneration of the CRC4 frames in the NTI this option is only activated when option 2 Digital link with CRC processing in the NT1 is selected Revision 3 11 2000 LTU NTU Operating Manual SZ DOC W2E 3 pdf Version 1 2 4 4 n x 64kbit s Interface This chapter describes the configuration options and alarms related to the n x 64kbit s user interface 4 4 1 Features The n x 64kbit s interface is software configurable between V 35 V 36 and X 21 The bit rate can be selected in steps of 64kbit s from 64kbit s up to 2048kbit s n x 64kbit s n 1 32 Independent receive and transmit clocks for V 35 and V 36 Codirectional from equipment connected to n x 64kbit s port and contradirectional clock generated by internal reference of from receive clock recovery transmit clocks are possible Detection for loss of clock and clock rate mismatch in codirectional clock mode Standard SubD25 connector ISO 2110 for V 35 RS 530 for V 36 proprietary for X 21 for DCE operation other connectors ISO 2593
13. 2 1 Impedance 1200 LTU 1 5 x ooo 0 y Type SubD9 male Front View ME Pin Signal Description 1 RXa E1 120Q Output wire A 2 FPE Functional Protective Earth cable shield RX 3 NC 4 FPE Functional Protective Earth cable shield TX 5 TXa E1 1200 Input wire A 6 RXb E1 120Q Output wire B 7 NC 8 NC 9 TXb E1 1200 Input wire B Dual LTU 1 8 O O O O O POO O OOO OPO Type SubD15 male Front View o 15 Pin Signal Description 1 RX1a E1 1200 Output 1 wire A 2 FPE Functional Protective Earth cable shield RX 3 TX1a E1 1200 Input 1 wire A 4 FPE Functional Protective Earth cable shield TX 5 FPE Functional Protective Earth cable shield RX 6 RX2a E1 120Q Output 2 wire A 7 FPE Functional Protective Earth cable shield TX 8 TX2a E1 120Q Input 2 wire A 9 RX1b E1 120Q Output 1 wire B 10 NC 11 TX1b E1 1200 Input 1 wire B 12 NC 13 RX2b E1 120Q Output 2 wire B 14 NC 15 TX2b E1 120Q Input 2 wire B 70 Revision 3 11 2000 LTU NTU SZ DOC W2E 3 pdf Operating Manual Version 1 2 NTU 13 1 mE le O O Type SubD25 female Front View x is 25 14 Pin Description 1 E1 Ground 6 E1 1200 Output wire A 7 E1 Ground 8 E1 1200 Input wire A 19 E1 1200 Output wire B 21 E1 1200 Input wire B 10 2 2 Impedance 750 Type BNC 750 10 3 n x 64k
14. 27 SZ DOC W2E 3 pdf LTU NTU Version 1 2 Operating Manual In case of severe impairments on the second section REG NTU the G 826 performance of the first section is likely to be degraded due to the regenerator s strict coupling of the received and transmitted DSL frames Whenever one of the regenerator s receivers recovers frame alignment the transmitter that passes on these HDSL frames will immediately adjust the frame start to the recovered frame timing As a result a disturbed REG NTU section will cause occasional LFAs at the LTU side and as a consequence degrade the LTU s G 826 performance based on CRC6 and RRBE NTU Regenerator LTU CRC6 CRC6 CRC6 CRC6 G 826 Evaluation CRC6 FEBE CRC6 FEBE RRBE RCBE d RRBE RCBE Figure 5 13 Regenerator G 826 Performance Evaluation 5 2 2 E1 Interface Slave Master CRC4 CRC6 CRC6 CRC4 Test G 826 E OROSIFEBE Gen RX Figure 5 14 E1 G 826 Performance Evaluation On the El side four CRC4 check bits are generated per sub multiframe SMF and compared with the corresponding CRC4 bits in the following SMF If they do not match the CRC4 error counter is incremented The opposite station is informed of detected CRC4 errors by setting E bits in the transmitted frames At the same time the E Bits from the opposite station are counted and can be used for performance monitoring For the El interface calculations according to G 826 are only possible in framed mode w
15. 4 2 6 V 54 Loops and Loop Control As the X 21 interface provides only the control interchange circuits C and I most of the features described afterwards are only applicable for V 35 and V 36 but not for X 21 4 4 2 6 1 Normal Handshake Operation When no loopback is established the control circuits perform this handshake protocol e 105 RTS Request to send X 21 C Input from DTE For X 21 C OFF will cause a DTR alarm e 106 CTS Ready for sending X 21 I Is set ON when an DSL connection is established and 105 ON is detected e 107 DSR Data set ready Is set ON when an DSL connection is established e 108 DTR Data terminal ready Input from DTE For V 35 and V 36 108 OFF will cause a DTR alarm e 109 RLSD Data channel received line signal detector Is set ON when an DSL connection is established e 140 RL Loopback Maintenance test Input from DTE will be set OFF in normal mode e 141 LL Local loopback Input from DTE will be set OFF in normal mode e 142 TM Test indicator Is set OFF in normal mode 4 4 2 6 2 Supported V 54 Loops ITU T recommendation V 54 defines four test loops Loops 2 and 3 correspond to DSL loopbacks 2 and 1 The interchange circuits are set in the following way e V 54 Loop 3 Local loop established in the DCE i e DSL loopback 1 in an n x 64kbit s NTU LTU These output interchange circuits are set 107 ON and 142 ON e V 54 Loop 2 Loop in remote DCE i e DSL loo
16. CRC Monitor lt Opti G CRC Generator prong Figure 4 5 Digital Link without CRC Processing 4 3 2 2 Digital Link with CRC Processing in the NT1 Option 2 This is the usual PRA operating mode as described in ETS 300 233 and ITU T Rec G 962 Annex B The PRA interface is intended to be used in this mode L Local CRC error information R Remote CRC error information Mandatory M CRC Monitor Optional G CRC Generator Figure 4 6 Digital Link with CRC Processing in the NT1 CRCA is generated towards the NT2 TE and towards the ET and monitored at both sides of the NTI When a block with a CRC4 error is received from the NT2 TE CRC4 error 16 Revision 3 11 2000 LTU NTU SZ DOC W2E 3 pdf Operating Manual Version 1 2 information is transmitted towards the NT2 TE via E bits and optionally towards the ET via Sa6 bits When a block with a CRC4 error is received from the ET error information is transmitted towards the ET via E bits CRC4 errors detected at the T reference point of the NT2 TE are reported to the NTI via E bits and optionally towards the ET via Sa6 bits CRC4 errors detected at the V3 reference point of the ET are reported to the NT1 via E bits Loopback 1 and 2 control facilities and monitoring of defect conditions are implemented according to ETS 300 233 Depending on the distribution of NT1 and LT functionality two setups are possible for option 2 e The master is El configured
17. Configuration Commands 44snnnsnnnnnennnnnnnnnnnnnnn en nnnnnnnnnnnnn 74 8 3 3 3 DEFAULT Command sssesssesesessssasssasqaasnnasnnsennntnnts 76 8 3 3 4 REMOTE Command sssssssssssassssssssssasqnasqnasnnstnnstnnts 81 8 3 3 5 COPY GOMMANU Missa 82 8 3 8 LOCAL Command sasinan adan mesa saa eea naa SEN d aaa saa aaa aaa dian ee naa EAE Eea 82 8 3 4 Accounting Management AM sss 82 8 3 5 Security Management SM sesssssssssseseeeenen eene 82 8 4 Monitor Commands for the n x 64kbit s Interface ooocccoccncccccconnnicoccnccanonons 82 8 4 1 Fault and Maintenance Management FMM 83 8 4 1 1 ALARM Command sesssssssssssesaeanteasqeanqnaennasnnsennstnnts 83 8 4 2 Configuration Management CM sese esee a nana nean a nana nne 83 8 4 2 1 CONFIG Command v ltveooreoooooeoooeeooooooooooeoeooooooooooonoeooooooooeoeoonooous 84 8 4 2 2 BITRATE Command ssssssssssssssssssssssasqaasqnasnnsennstnnts 85 8 4 2 3 CLOCKMODE Command sssssssssssssssssasssasssasnnssnnstnnts 85 8 4 2 4 CLOCKDIR Command ssessssssssssssasssassnasnnssnnstnnss 85 8 4 2 5 V54LOOPS Command s sssssssessssssssasssasqnasnnasnnssnnnennts 85 8 4 2 6 BYTETIMING Command sssesssessssssssasssasssasqns
18. RRBEn n Regenerator remote block errored indicating error blocks are being received on the REG R LTU side of the regenerator 2 RCBEn n Regenerator central block errored indicating error blocks are being received on the REG C NTU side of the regenerator E1 The G826 E1 command displays the ITU T G 826 error performance parameters on the E1 2Mbit s side This command is only available if framed mode is enabled If CRC4 mode is on the following parameters are displayed LTU 04 PM G826 E ESR 5 SESR 5 BBER 5 Available time Unavailable time Errored Blocks Errored seconds Severely errored seconds 00000000 00000000 00000000 0 00 0 00 0 00 00524129 00000024 00000000 00000000 00000000 0 00 0 00 0 00 00524129 00000024 LTU 04 PM Revision 3 11 2000 43 SZ DOC W2E 3 pdf Version 1 2 44 If CRC4 mode is off the following parameters are displayed LTU 04 PM G826 El LTU NTU Operating Manual Errored blocks Errored seconds Severely errored seconds ESR SESR 5 BBER 5 Available time Unavailable time 00000000 00000000 00000000 0 00 0 00 0 00 00009841 00000024 LTU 04 PM Definitions 1 CRC4 Cyclic redundancy check indicating errored sub multiframes received on the local 2Mbit s El side 2 E bit CRC 4 indication bit denoting received errored sub multiframes on the 2Mbit s El side 3 FAS Errored Frame A
19. S LFA S e Loss of external clock EXT LOC in external clock mode only e Receiving AIS on El side AIS S e Excessive block error rate on El side BER S PRA Interface e Loss of signal at the T reference point LOS S e Loss offrame at the T reference point LFA S e Receiving AIS at the T reference point AIS S e Loss offrame at the V3 reference point LFA V3 e Receiving AIS at the V3 reference point AIS V3 n x 64kbit s Interface e Loss of codirectional clock or clock rate mismatch clock mode n x 64 port on the n x 64kbit s side LOC e Data Terminal Ready DTR circuit 108 2 on the n x 64kbit s port is detected as OFF For X 21 the control signal C is represented by DTR e The loops and 2 can be controlled by the circuits 140 RL and 141 LL thus the alarms LOOPI and LOOP2 can also be caused by the n x 64kbit s interface Displaying an urgent alarm has a higher priority than displaying a non urgent one i e an amber alarm will be overwritten by a red alarm 32 Revision 3 11 2000 LTU NTU SZ DOC W2E 3 pdf Operating Manual Version 1 2 6 1 2 2 Remote LED The remote LED is an image of the local LED of the remote slave station see previous LED table for exceptions When configured as slave no remote access is possible so the remote LED is turned off 6 2 Alarm Relays 6 2 1 LTU There are two concepts for signaling the alarm status of the LTU in the subrack Each LTU has an o
20. a digital link with CRC processing in the NTI option 2 according to 1 604 However also the other subscriber access options described in I 604 Annex A can be configured One of the DSL system units must be configured as master and the other as slave Normally the LTU or the NTU respectively at the exchange is configured as the master on the DSL link and the PRA NTU as slave The equipment described above provides an access digital section for ISDN primary rate at 2048kbit s The 1200 port or optionally the 750 In Out BNC is the user network interface for primary rate access which is denoted as T reference point in ISDN terminology The equipment at the user side of the T reference point which may be TE1 TA or NT2 is termed TE or NT2 in the normative references Therefore it is denoted as NT2 TE in this document The interface towards the exchange which will be abbreviated ET in the following is the V3 reference point Revision 3 11 2000 LTU NTU SZ DOC W2E 3 pdf Operating Manual Version 1 2 4 3 1 PRA Mode The modem can work as NT1 LT or NT1 and LT combined 4 3 2 CRC4 Processing Options In addition to the usual PRA operation with CRC4 processing in both directions the PRA interface also offers other modes of operation Following ITU T Rec I 604 Annex A three subscriber access options for a digital link are supported The PRA interface can be configured to work either as a digital link without CRC processing opt
21. an NTU is equipped with an El or n x 64kbit s user interface the shields signal ground of the cables are coupled to the ground of the NTU Powering of the NTU unit can be selected by a slide switch located on the rear side of the housing e Remote powering from the LTU over the DSL line or e Local powering by an external AC DC or DC DC adapter The position of the switch can be changed by means of a small screw driver Before operating the switch the DSL line connector and the mains adapter connector should be removed Revision 3 11 2000 35 SZ DOC W2E 3 pdf LTU NTU Version 1 2 Caution Operating Manual The supply voltage input is protected against reversal of polarity but not fused Appropriate fusing has to be done externally AC DC adapters from SZ are recommended A 48Vpc battery supply must not be connected directly to the AC DC adapter connector High voltage transients from the DSL line may damage other equipment connected to the battery A DC DC converter with 4kV transient isolation voltage should be used in this case 7 2 2 Power Failure Alarm In case of a failure of the NTU s power supply both LEDs will be extinguished The two DSL overhead bits ps and ps2 inform the remote LTU about the status of the NTU power supply If the NTU is remotely powered ps is set to 1 If the NTU is locally powered ps2 is set to 1 if the supply voltage drops below 40 5Vpc ps2 is set to 0 to inform the remote station
22. be reset 8 3 3 Configuration Management CM 02 26 00 Configuration management activated Type M to return to MAIN or lt H gt for HELP information Type H and the monitor lists all available commands in the configuration sub menu LTU 04 CM H CONFIG Display local configuration G704 ON OFF Set framed mode transparent mode CRC4 ON OFF Set CRC4 mode on off EBIT ON OFF Set automatic E Bit insertion on off AISGEN ON OFF Set AIS generation on off AISDET ON OFF Set AIS detection on off EXTCLK ON OFF Set external clock mode on off UIF E1 PRA Set user interface typ POWER ON OFF Set remote powering on off MASTER ON OFF Set HDSL master mode slave mode RESTART ON OFF Set autorestart on off MODE N F P H Set HDSL operating mode DEFAULT 0 2 Set default configuration REMOTE Activate remote configuration Revision 3 11 2000 53 SZ DOC W2E 3 pdf LTU NTU Version 1 2 Operating Manual M AIN Return to main menu LTU 04 CM Notes e The MASTER command is valid on the LTU L only e The POWER command is valid on the LTU R only e The UIF type command selects only equipped user interfaces 8 3 3 1 CONFIG Command The CONFIG command displays the configuration of the unit LTU 04 CM CONFIG ocal Configuration Id 2 Mbit s G 703 2 Mbit s Framing ETU Tr G7 04
23. do not locate the product where persons will walk or trip on the cables Connect this equipment only to an approved properly grounded and accessible socket outlet To completely turn off this equipment you must remove the power cord from the system Avoid connecting or disconnecting data lines during lightning storms Follow the accompanying instructions when connecting the required cabling Make sure no foreign objects or liquids come into contact with the internal components danger of shock or short circuit In an emergency e g damaged external housing or internal elements liquid spills immediately remove the power cord and notify customer service Electrostatic electricity can damage internal components Ground yourself before touching any internal components SZ DOC W2E 3 pdf LTU NTU Version 1 2 Operating Manual e Never use water to clean this device If water reaches the internal parts extreme danger may result to the user or the equipment e Never use scouring or abrasive cleaning agents or agents containing alkaline on device Damage of the device s exterior may result Information for the Technician e Remove the network cables before opening this equipment or removing the plug in units respectively Safety Notices Do not proceed any of these notices until you have fully understood the implications e Caution Potential hazard that can damage the product e Important Potential hazard that can seriousl
24. rate at regenerator according to G 826 gt 15 DSL block error rate according G 826 2 30 DSL block error rate according G 826 1596 Alarm indication from remote station DSL test loop 1 active DSL test loop 2 active Alarm cutoff Analog loopback Current limit detection at loop A Current limit detection at loop B Alarm indication from regenerator at loop A or regenerator loopback active Alarm indication from regenerator at loop B or regenerator loopback active Regenerator loopback active The ACO Alarm Cut Off command enables or disables the alarm relays When ACO is on all alarms are disabled and the alarm relays are inactive The local alarm LED signalizes a non urgent alarm Revision 3 11 2000 51 SZ DOC W2E 3 pdf Version 1 2 LTU NTU Operating Manual LTU 04 FMM ACO ON 11 03 10 alarm cutoff activated LTU 04 FMM ACO OFF 11 11 70 alarm cutoff deactivated 8 3 2 8 LOOP1 Command The LOOPI command starts the local loopback LTU 04 FMM LOOP1 ON 01 10 50 Loop l activated LTU 04 FMM 8 3 2 9 LOOP2 Command Note The LOOP2 command starts the remote loopback LTU 04 FMM LOOP2 ON 01 10 50 Loop 2 activated at remote station LTU_04_FMM gt The remote loopback is only possible from master side 8 3 2 10 LOOPREGn Command Note The LOOPREGn command starts the loopback in the n regenerator LTU 01 FMM LOOPREGI ON 29 25 70 regenerator 1 loopback activ
25. rate configured and n x 64kbit s bandwidth The mapping of the El data to the time slots 0 to 31 depends on the El bandwidth 4 4 2 1 2 nx 64kbit s Time Slot Mapping With an n x 64kbit s bandwidth of 32 x 64kbit s the time slots are filled as follows depending on the n x 64kbit s bit rate n e forn lt 15 time slots 1 to n are filled with n x 64kbit s the unused time slots are filled with all ones data e for 16 lt n lt 30 time slots 1 to 15 and 17 to n 1 are filled with n x 64kbit s data time slot 16 is skipped the unused time slots are filled with all ones data e forn 31 time slots 1 to 31 are filled with n x 64kbit s data e forn 32 time slots 0 to 31 are filled with n x 64kbit s data 4 4 2 1 3 E1 Time Slot Mapping A mixed mode connection is a link between a modem using an El PRA interface and a modem using an n x 64kbit s or Ethernet interface The n x 64kbit s Ethernet data is available in n El time slots e forn lt 15 time slots 1 to n e for 16 lt n lt 30 time slots 1 to 15 17 to n1 e forn 31 time slots 1 to 31 e forn 32 time slots O to 31 4 4 2 2 User Interface Type The interface mode can be set to V 35 V 36 or X 21 4 4 2 3 Bit Rate The bit rate can be selected in the range of 64kbit s up to 2048kbit s in steps of 64kbit s n 1 32 4 4 2 4 Clock Mode 20 Previous versions of n x 64kbit s interfaces from Schmid Telecommunication used the same clock to receive and to
26. terminal ready X 109 Data channel received line signal detector X 113 X Codirectional transmit clock the transmitted data will be sampled X with the rising edge 114 Contradirectional transmit clock the transmitted data will be sampled X with the rising edge 115 S Receive clock the received data will be sampled with the rising X edge 140 Remote loopback X 141 Local loopback X 142 Test Mode X B Byte timing OFF during the first half of the last bit of a byte X BI Byte timing input proprietary designation X 72 The interface is of type DCE use the appropriate adapter cable for a DTE connector or the standard connectors ISO 2593 for V 35 ISO 4902 for V 36 ISO 4903 for X 21 Revision 3 11 2000 LTU NTU SZ DOC W2E 3 pdf Operating Manual Version 1 2 10 3 2 nx 64kbit s Cables 10 3 2 1 V 35 DTE Cable V 35 ISO 2593 34 Pin Connectors Connector Type 34 pin ISO 2593 female ITU T Pin Assignment 34 pin female Pin Assignment 25 pin male Number a b a b FGND A 1 SGND B 7 103 P S 2 14 105 C 4 106 D 5 107 E 6 108 H 20 Ros nho le qp 3 Be 113 U W 24 11 114 Y AA 15 12 115 V X 17 9 140 N 21 Revision 3 11 2000 73 SZ DOC W2E 3 pdf Version 1 2 10 3 2 2 V 35 DCE Cable Connector Type 34 pin ISO 2593 male LTU NTU Operating Manual ITU T Pin Assignment 34 pin male Pin Assignment 25 pin male Number a b a b FGND
27. to the LTU while the return path from the NTU is open When a Regenerator Loopback is activated the following two restrictions must be considered e NTU Slave is not available by means of EOC related management functions e No startups are performed on the second REG NTU section However if the REG NTU section was running prior to the activation of the Regenerator Loopback the second section will remain active Regenerator HDSL from Master HDSL to Slave only one pair shown other pair similar Figure 12 22 Regenerator in Loopback Mode If activated the Regenerator Loopback causes the following alarms e LOOPREG indicating that Regenerator Loopback command was entered LTU R only e REG A and REG B indicating that regenerator has executed the loopback command 12 2 Hints for Troubleshooting Problem To do No response from the e Please check your physical serial connection modem e Does the PC cable combination work on other 88 Revision 3 11 2000 LTU NTU Operating Manual Strange signs are received in response from the modem Problems with E1 clock frequency drift slips No startup Revision 3 11 2000 SZ DOC W2E 3 pdf Version 1 2 modems Is it the correct cable see manual section Cables Is the cable grounding correctly connected floating ground Check cable Please check your baud rate COM1 COM2 etc configuration on the PC see chapter Monitor Try typing
28. transmit data A phase difference was allowed but the clock frequencies had to be nominally equal This led to a few restrictions when configuring the n x 64 kbit s port Note that these restrictions still apply when using old equipment together with new equipment In that case follow the configuration instructions in the previous manual For V 35 and V 36 the receive and the transmit clock are independent The receive clock is always the recovered remote clock The clock mode configuration applies only to the transmit clock For X 21 there is only one clock circuit S to receive and transmit the Revision 3 11 2000 LTU NTU SZ DOC W2E 3 pdf Operating Manual Version 1 2 clock mode determines the source of that single clock however in the codirectional n x 64 port clock mode X is used as a codirectional transmit clock and S is used only as receive clock In the following section the clock which can be selected by the clock mode is denoted as transmit clock The clock mode determines in most cases whether the transmit clock is codirectional it has the same direction as the transmit data i e it is an input signal or contradirectional it has the contrary direction of the transmit data i e it is an output signal These clock modes are possible e nx 64 port The transmit clock is the codirectional clock coming from the equipment connected to the n x 64kbit s port circuit 113 X e El port The transmit clock is gen
29. 0 15 90 B ACTIVATE 3 transmit S1 00 20 00 A ACTIVATE 4 transmit S1 Revision 3 11 2000 LTU NTU SZ DOC W2E 3 pdf Operating Manual Version 1 2 00 20 00 B ACTIVATE 4 transmit S1 00 24 10 A ACTIVATE 5 final transceiver mode 00 24 10 B ACTIVATE 5 final transceiver mode 00 24 30 A ACTIVE RX receive ready 00 24 30 B ACTIVE RX receive ready 00 24 50 A ACTIVE TX RX transmit receive 2B1Q data 00 24 50 B ACTIVE TX RX transmit receive 2B1Q data LTU 04 FMM 8 3 2 4 STATUS Command The STATUS command displays the actual system status LTU 04 FMM STATUS SYNC A 02 PID A 01 LOSD A 00 HRP A 01 RPF A 01 RPS A 02 SYNC B 02 PID B 02 OSD B 00 HRP B 01 RPF B 01 RPS B 02 MAIN A LTU 04 FMM Definitions shown for loop A loop B similar Revision 3 11 2000 47 SZ DOC W2E 3 pdf Version 1 2 48 LTU NTU Operating Manual LOSD A Parameter Status Meaning SYNC A Status of DSL synchronisation state machine of loop A according to ETSI TS 101 135 00 Out of Sync State 02 In Sync State Note This parameter does NOT suffice as an indication for an established DSL link PID A Pair Identification of Loop A according to ETSI TS 101 135 00 No PID information available 01 Identification Pair No 1 02 Identification Pair No 2 Note If PID A is 02 and PID B is 01 on the Slave side then Pair A and
30. 2 0 32 Select clock source O Port 1 1 Port 2 2 internal 3 remote Set clock direction of Port 1 and 2 O codir l contradir Set V 54 loop control o Set user interface typ Set HDSL master mode Set autorestart on off Set default configurati Return to main menu n off slave mode on Local Configuration V 35 Bitrate Port 1 Bitrate Port 2 Clock Mode Clockdir Port 1 Clockdir Port 2 V 54 Loops HDSL Master Slave Autorestart Operating Mode Channel A Channel B 32x 64 off Remote Contradirectional Contradirectional Disabled 02048 kbit s Slave Enabled Normal On On 8 4 2 2 BITRATE Command Set bit rate n x 64kbit s of Port 1 and Port 2 nl n2 0 32 60 To turn off the port the bit rate must be 0 Example n1 32 n2 0 The command for this example will be Revision 3 11 2000 LTU NTU SZ DOC W2E 3 pdf Operating Manual Version 1 2 NTU CM BITRATE 32 0 8 4 2 3 CLOCKMODE Command Select clock source O Port 1 1 Port 2 2 internal 3 remote 8 4 2 4 CLOCKDIR Command Set clock direction of Port 1 and 2 O codirectional 1 contradirectional In most cases the clock direction is implicitly set by the clock mode 8 4 2 5 V54LOOPS Command Select whether it is possible to switch loop 1 and 2 using the control circuits 140 RL and 141 LL This command is only available in V 35 and V 36 modes 8 4 2 6 BYTETIMING Command
31. 32 Monitor interface and the alarm relays An optional Control and Management Unit CMU in the 19 subrack acts as an SNMP agent and brings TMN facilities to the system Revision 3 11 2000 1 LTU NTU Operating Manual SZ DOC W2E 3 pdf Version 1 2 2 General Information 2 1 Important Safeguards This section describes the safety precautions the user should abide by when operating this equipment Revision 3 11 2000 Transport this equipment in its original packaging or by using appropriate materials to prevent against shock and impact Before setting up this product for operation please make note of the accompanying environmental requirements Slots and openings in the unit are provided for ventilation To ensure reliable operation and to protect it from overheating these slots and openings must not be blocked or covered Condensation may occur externally or internally if this equipment is moved from a colder room to a warmer room When moving this equipment under such conditions allow ample time for the equipment to reach room temperature and to dry before oper ating Note that normal operation in accordance with EN 60950 is only possible when the external housing is left in place ventilation fire prevention and radio interference Before supplying power verify the power rating identified on the marking label complies with the local power source Do not allow anything to rest on any of the attached cables and
32. 378 0F1 V1 SZ 378 0G1 V1 SZ 378 0H1 V1 SZ 378 0J1 V1 SZ 378 0K1 V1 Z 378 0L1 V1 Revision 3 11 2000 5 LTU NTU Operating Manual SZ DOC W2E 3 pdf Version 1 2 3 Installation Gulde This chapter gives a brief overview over the necessary steps to install a Watson modem 3 1 Preparations Before going to the installation site check what you need of the following equipment in addition to the modem AC DC Power adapter or supply cable for tabletop or minirack NTU DSL cable Network cable Monitor cable and terminal Mounting material In case your installation requires special DSL cabling or rack mounting check what you need of the following tools Wire stripping tool appropriate for the cable size Crimp tools for connectors Screwdrivers 3 2 Installing a Watson Modem Revision 3 11 2000 Unpack and mount the unit safely Keep chapter Important Safeguards in mind when choosing an appropriate place for tabletops Miniracks can be mounted in 19 racks Plug in units are simply inserted into subracks and will start operation immediately Mounting of subracks is described in manual Installation Manual of Subrack Check the setting of the remote power switch jumper NTU ln the default switch position Rem the NTU modem is powered via the xDSL line and will start operation immediately after connection of the xDSL line In case the remote LTU modem does not support power feeding local power sup
33. 7 9 7 14 20 23 Z o a Ug 1 Pins 17 20 and 9 23 have to be connected inside the 25 pin connector Alternatively when the codirectional clock X is used but no byte clock this cable can be a b a b 1 1 8 7 G S 6 13 15 12 R ani 3 16 T 2 9 2 14 l 5 12 5 13 X 7 14 24 11 Revision 3 11 2000 77 SZ DOC W2E 3 pdf LTU NTU Version 1 2 Operating Manual 10 3 2 6 X 21 DCE Cable Connector Type 15 pin ISO 4903 male ITU T Pin Assignment 15 pin male Pin Assignment 25 pin male Number a b a b FGND 1 1 p TQ FS E NN S 6 13 2411 R 4 11 2 14 T 2 9 3 16 C 3 10 5 3 C il ii 7 7 di ao y p UBE HEAR 1 Alternatively when the codirectional clock X is used but no byte clock this cable can be used ITU T Pin Assignment 15 pin female Pin Assignment 25 pin male Number a b a b FGND 1 1 pese Bu e ei R 4 11 2 14 T 2 9 3 16 C 3 10 5 13 1 IE IP 78 Revision 3 11 2000 LTU NTU SZ DOC W2E 3 pdf Operating Manual Version 1 2 10 4 Monitor Connector NTU Type SubD9 female Front View Description RS 232 Transmit Data RS 232 Receive Data Common contact of Alarm relay RS 232 Signal Ground DA NC Urgent Alarm contact normally closed DA NO Urgent Alarm contact normally open ND NC Non Urgent Alarm contact normally closed 9 ND NO Non Urgent Alarm contact normally open 10 5 Mon
34. A 1 META O A 103 P S 3 16 104 R T 2 14 105 C 5 106 D 4 108 H 6 109 113 U W 17 9 114 E 140 N 25 141 L 25 142 NN 18 74 Revision 3 11 2000 LTU NTU SZ DOC W2E 3 pdf Operating Manual Version 1 2 10 3 2 3 V 36 DTE Cable V 36 ISO 4902 37 Pin Connectors 19 female Connector Type 37 pin ISO 4902 female ITU T Pin Assignment 37 pin female Pin Assignment 25 pin male Number a b a b FGND 1 1 SGND 19 7 SGND a 37 7 SGND b 20 7 104 6 24 3 16 105 7 25 4 19 106 9 27 5 13 107 11 29 6 22 109 13 31 8 10 113 17 35 24 11 114 5 23 15 12 141 10 18 142 18 25 Revision 3 11 2000 75 SZ DOC W2E 3 pdf LTU NTU Version 1 2 Operating Manual 10 3 2 4 V 36 DCE Cable Connector Type 37 pin ISO 4902 male ITU T Pin Assignment 37 pin male Pin Assignment 25 pin male Number a b a b FGND 1 1 SGND 19 7 SGND a 37 7 104 6 24 2 14 105 7 25 5 13 106 9 27 4 19 108 12 30 6 22 109 a 113 17 35 17 9 114 140 14 25 141 10 25 142 18 18 76 Revision 3 11 2000 LTU NTU SZ DOC W2E 3 pdf Operating Manual Version 1 2 10 3 2 5 X 21 DTE Cable X 21 ISO 4903 15 Pin Connectors male female Connector Type 15 pin ISO 4903 female ITU T Pin Assignment 15 pin female Pin Assignment 25 pin male Number a b a b FGND 1 1 G 8 7 S 6 13 15 12 R 4 11 3 16 T 2 14 C 3 10 4 19 5 12 5 13 7 14 1
35. CRC4 On E Bit Insertion On AIS Generation On AIS Detection On External Clock Disabled HDSL Master Slave Master Autorestart Enabled Operating Mode Normal Channel A On Channel B On Remote Powering On LTU 04 CM Notes e To display the remote configuration supported by master only see REMOTE command in section REMOTE Command e After each configuration change the new configuration is automatically displayed e The remote powering option will be displayed for the LTU R only 8 3 3 2 Configuration Commands 54 E1 Interface G704 Set framed mode transparent mode CRC4 Set CRC4 mode on off EBIT Set automatic E Bit insertion on off AISGEN Set AIS generation on off AISDET Set AIS detection on off Revision 3 11 2000 LTU NTU Operating Manual EXTCLK UIF PRA Interface PRA CRC4 CRC4SA6 UIF DSL Interface Revision 3 11 2000 POWER MASTER RESTART MODE SZ DOC W2E 3 pdf Version 1 2 Set external clock mode on off Set the user interface type to El or PRA Select the ISDN PRA functional entities of the modem OFF No PRA function transparent transmission NTILT Both NTI and LT LT Only LT NTI Only NTI Set CRC4 processing option Subscriber access option 1 Digital Link without CRC4 Processing 2 Digital Link with CRC4 Processing 3 Option 3 is not available 4 Digital Link with CRC4 Monitoring This configurati
36. Generation ion lock Master Slave Autorestart Operating Mode Channel A Channel B Remote Powering LTU 01 CM CCITT G 704 On On On On Disabled Master Enabled Normal On On On Revision 3 11 2000 LTU NTU Operating Manual LTU 01 CM DEFAULT 2 ocal Configuration SZ DOC W2E 3 pdf Version 1 2 2 Mbit s Framing CRC4 E Bit Insertion AIS Generation AIS Detection External Clock HDSL Master Slave Autorestart Operating Mode Channel A Channel B Remote Powering Transparent On Off Master Enabled Normal On On On LTU 01 CM In PRA mode the default configurations give standard settings for each PRA mode LT NTI NTI amp LT NIU CM DEFAULT 0 Local Configuration LT Monitoring on Slave Enabled Normal On On Revision 3 11 2000 57 SZ DOC W2E 3 pdf LTU NTU Version 1 2 Operating Manual NTU CM DEFAULT 1 Local Configuration Id ISDN PRA PRA PRA Mode NT1 Access Option Processing on CRC4 Error gt Sa6 On HDSL Master Slave Slave Autorestart Enabled Operating Mode Normal Channel A c On Channel B On NTU CM NTU CM DEFAULT 2 Local Configuration Id ISDN PRA PRA PRA Mode NTI 6 LT Access Option Processing on CRC4 Error gt Sa6 On HDSL Master Slave Slave Autorestart Enabled Operating Mode Normal Channel A i On
37. If one LTU supports a second interface it may be addressed by adding 12 to the address of the first interface To select the first interface on the LTU in slot number SN just type SN at the terminal even in the case it does not show any prompt e g to select the LTU in slot 01 type 01 To select the second interface optional in the same slot number just type SN 12 at the terminal Revision 3 11 2000 39 SZ DOC W2E 3 pdf LTU NTU Version 1 2 Note Operating Manual Single LTU Interface Addressing Scheme Unit First Interface Address Subrack Dual LTU Interface Addressing Scheme Unit First Interface Address Second Interface Address Subrack Figure 8 19 LTU Interface Addressing Scheme To see which units in a rack are available you can use the ECHO command Each present unit will respond with its associated slot number SN The response could be 01 9603 9608 10 11 12 9615 Each command must be terminated by a carriage return 8 2 2 LTU Minirack 40 For Minirack versions of the LTU the address number of the DSL interface can be set manually by monitor commands in the Configuration Management CM menu After power up of a Minirack LTU the local monitor main menu appears always with the first DSL system activated behaviour like a NTU Address numbers in range 1 127 can be set
38. MN Signal Level TIA EIA 485 RS 485 Data Rate max 9600 Baud Asynchronous Protocol SZ Proprietary Alarm Relays Max Switching power 30W Max Switching current 1A Max Switching voltage 110V pc 125V ms isolation contact 100V pps for 1min coi Note As the RS485 bus requires a 120Q termination impedance hence a cable connector attached to the last minirack LTU in a chain has to provide the bus termination 11 1 5 The 230 115V ms and 48Vpc Supply of the Minirack The minirack containing the LTU can be powered either from the 230 115V mains or from a 48Vpc supply or from both The 230 115 Vin power entry module can be selected between 230 or 115V m Changing the mains option must be complemented by replacing both mains fuses The 230 115Vins supply module contains the mains transformer which galvanically separates the minirack circuitry from the mains The 48Vpc supply input is inverse polarity proof and is also protected with a 1A slow blow fuse The 48Vpc voltage delivered to the LTU or NTU is buffered with a 1500u F capacitor In the case of a power fail the stored energy assures that the power fail alarm is asserted before the power shut down by at least 60ms 11 1 6 External Clock The LTU Minirack equipped with an external 2048 kHz clock input option contains a module designed to receive and supervise the external clock The external clock input is a 75Q BNC type and is coupled to the module via a transforme
39. O e x a A e lej e LI nu LA RI LI nu LI nu Q Q El 1200 El 750 Dual 2 E1 1200 Dual 2 E1 759 Revision 3 11 2000 67 SZ DOC W2E 3 pdf Version 1 2 9 4 Minirack LTU Front Panel Dual 2 E1 1200 LTU NTU Operating Manual O 1184 240A S0 6012 sz 798 ET KIL Icd J 5 2800 TIA JET Fa TO ta CE m Exe Schmid O Dual 2 El 750 115V 240A S0 6012 O SOKAN e zl P o ed ADSINDO ason id a QO O0 kal S O cE e LA SB Schmid 68 Revision 3 11 2000 LTU NTU Operating Manual SZ DOC W2E 3 pdf Version 1 2 10 Connectors Description 10 1 DSL Connector Type RJ45 8 Front View de 8 RJ45 8 l T NTU and LTU LTU Dual Pin Signal Description Description 1 NC Loop D tip 2 Shield DSL cable shield optional Loop D ring 3 LB a Loop B tip Loop B tip 4 LA a Loop A tip Loop A tip 5 LA b Loop A ring Loop A ring 6 LB b Loop B ring Loop B ring 7 Shield DSL cable shield optional Loop C tip 8 NC LC b Loop C ring Revision 3 11 2000 69 SZ DOC W2E 3 pdf Version 1 2 LTU NTU Operating Manual 10 2 E1 Connector 10
40. Ohm Figure 7 18 LTU powering two REGs Line feed current vs loop resistance two different REG power consumptions 38 Revision 3 11 2000 LTU NTU SZ DOC W2E 3 pdf Operating Manual Version 1 2 8 Monitor 8 1 General The units can be connected to a terminal or a PC with a terminal emulation in order to monitor relevant events and to display additional information such as signal quality of the DSL link or the G 826 error performance parameters In addition full system configuration and fault localization can be done over the monitor interface The terminal for monitoring should be VT100 compatible and be configured as follows e 9600 baud asynchronous e 8 bits no parity one stop bit e XON XOFF enabled e No new line on carriage return i e no line feed on carriage return 8 2 Addressing 8 2 1 LTU There is a point multipoint TTL bus 9600 baud on the subrack s backplane The TTL to RS 232 level conversion is done on the ACU where the monitor connector is located In order to re enable communication of LTUs occasionally left in XOFF state it is recommended to start each session with Ctrl Q XON followed by an ECHO command At any one time only one of the LTUs in the subrack can be logically connected to the monitor interface The appropriate LTU interface is addressed i e selected according to its physical position in the subrack starting with the leftmost slot number 01 and ascending rightwards to number 12
41. Pair B between master and slave units are crossed At the Master side PID A is always 01 and PID B 02 Status of LOSD bit in DSL frame according to ETSI TS 101 135 No LOSD information available No signal at application interface of remote station either LTU or NTU Application interface signal of remote station is o k HRP A or NRA A Status of HRP bit in DSL frame according to ETSI TS 101 135 No HRP information available Regenerator present No regenerator present Number of Regenerators available RPF A Remote power feeding status Remote power feeding on loop a switched off Remote power feeding on loop a switched on Note If the LTU is configured with remote power on but RPF is off the current limit detector has switched off the remote power feeding Revision 3 11 2000 LTU NTU SZ DOC W2E 3 pdf Operating Manual Version 1 2 RPS A Status of ps1 and ps2 bit in DSL frame according to ETSI TS 101 135 ps1 s 0 01 0 02 1 03 1 MAIN DSL master loop A Loop A B Loop B PRA PRA Current state of the digital section DS according to mode only ETS 300 233 section 9 4 only the states possible in NT1 amp LT mode are displayed 00 NTU dying 01 NTU dying amp FV3 FC5 02 NTU dying amp FC4 03 NTU dying amp FC4 amp FV3 FC5 04 NTU dying amp AIS 05 NTU dying amp AIS amp FC4 06 Normal function 07 FC4 08 FV3 FC5 09 FV3 FC5 amp FC4 10 Loopback 1 11 Loopbac
42. RJ 45 8 pin Revision 3 11 2000 LTU NTU Operating Manual 11 1 2 User Interface SZ DOC W2E 3 pdf Version 1 2 El Norm referred ITU T Rec G 703 G 704 Bit Rate 2048kbit s 50ppm Line Code HDB3 Framing ITU T G 704 transparent Input Impedance 1202 75Q Signal Amplitude 3 00V 1200 12 37V O 750 Jitter Performance According to ITU T Rec G 823 ESD Protection Connector Type 8kV Air discharge LTU SubD9 male 1200 or BNC 750 NTU SubD25 female 1200 or BNC 750 PRA Norm referred ETS 300 233 ETS 300 011 ETS 300 046 nx 64kbit s V 35 V 36 X 21 Bit Rate nx64 kbit s n 1 32 Signal Levels Data Lines ITU T V 35 ITU T V 11 ITU T V 11 Clock Lines ITU T V 35 ITU T V 11 ITU T V 11 Control Lines ITU T V 28 ITU T V 11 V 10 ITU T V 11 ESD Protection 8kV Air discharge Connector Type HDSL SubD25 ISO SubD25 RS 530 SubD25 female 2110 female female Connector Type Cable 34 pin ISO 37 pin ISO 4902 15 pin ISO 2593 4903 Revision 3 11 2000 83 SZ DOC W2E 3 pdf LTU NTU Version 1 2 Operating Manual 11 1 3 Monitor Interface Signal Level RS 232 Data Rate 9600 Baud Asynchronous Protocol 8 Bit No Parity 1 Stop Bit No Linefeed with Carriage Return XON XOFF enabled Connector Type SubD9 female 11 1 4 TMN and Alarm Interface Minirack LTU Only Connector Type SubD15 female T
43. SZSchmid Watson 2 Rev E LTU NTU Operating Manual Document Identification SZ DOC W2E 3 pdf Document Version 1 2 Document Revision 3 11 2000 Binzstrasse 35 CH 8045 Zurich Switzerland CH 1 456 11 11 Fax CH 1 466 92 92 SZ DOC W2E 3 pdf Version 1 2 Version of Operating Manual LTU NTU Operating Manual Version Control Major changes to previous version 0 9 Creation SSt UFh 1 0 Revised Version CTa 1 1 Description of the Commands RESET and STOPAL for the Dual LTU CTa 1 2 Operating voltage range corrected Nx64 kbit s E1 Installation Guide CE Safety structure according W3 4 remote powering part LSs RAn TMN Interface and Minirack address features added URr Copyright 2000 by Schmid Telecommunication Zurich Switzerland All rights reserved Reproduction of part or all of the contents in any form is expressly prohibited without the prior written consent of Schmid Telecommunication Schmid Telecommunication has used its discretion best judgments and efforts in preparing this document Any information contained in this document is provided without any warranty of any kind Schmid Telecommunication hereby disclaims any liability to any person for any kind of damage Schmid Telecommunication may make improvements and or changes of this document at any time Revision 3 11 2000 LTU NTU Operating Manual Declaration of Conformity Watson 2 LTU E1 Rev E with 19 subrack S
44. Set remote powering on off RESTART ON OFF Set autorestart on off MODE N F P H Set HDSL operating mode ADDRESS 1 127 Set address V11WIRES 2 4 Set number of V 11 wires DEFAULT 0 2 Set default configuration REMOTE Activate remote configuration M AIN Return to main menu LTU 10 CM 8 5 1 ADDRESS Command The ADDRESS command allows the user to assign an address number in the range between 1 127 to the current DSL interface of a Minirack LTU LIU 02 CM ADDRESS 4 01 19 40 Address set to 04 ocal Configuration Id nx64 kbit s V 35 V 35 Bitrate Port 1 32 x 64 02048 kbit s HDSL Line Rate 02064 kbit s Master Slave Master Autorestart Enabled Remote Powering On TMN Address 04 V ll wires no 04 LTU 04 CM Revision 3 11 2000 63 SZ DOC W2E 3 pdf LTU NTU Version 1 2 Note Note Limitation Operating Manual For a Dual LTU Minirack it is possible to assign a higher interface address number to DSL system A than to DSL system B For Plug in LTUs the lowest interface number is always assigned to DSL system A and the pins with appropriate designation on the DSL connector of type RJ 45 Carefully note already used interface address numbers No automatic protection against multiple LTUs assigned to the same interface address number can be applied in a set up with several Minirack LTUs Two interfaces with same address number on the TMN bus will cause malfunction and the
45. TETTE 39 8 11 Status EEDS aire P ee ER naa aa Pe gene ren 40 6 1 2 Alarm Conditions ssssssssssseseeeeeeeenn emnes 40 61 21 EOCAlEED fast a DAA a e 40 6 1 2 2 Remote LED anne ee pace dese eoe tiye kt pi von side an eske ie Et 41 6 2 Alarm Relays eR lala 42 9 221 ETUS nia ni aa At Be eut Osee deca A Been oe eaten eee 42 6 2 1 1 Alarmi Gondilioris 2 Con EE IC tena Geos 42 622 LINT UIS ceret aA et es 43 8 2 2 1 Alarm Gonditions 2 ier or e Dreher XR EE RR rennt 43 Power Concept srren en ede tende tee krea L ne kap erect 45 SRI ELO NESCIO 45 7 1 1 Power and Grounding scrise ie riiin ianed a ia eieaa nen 45 7 2 INTUS ite A rr ONO EN 45 Tel Power and Grounding ass aieo seba bed ert eter eode Hl 45 7 2 2 Power Failure Alarm nean anan anana anana mene 46 7 3 Remote Powerlig eH epe ea e a aa ced e Se ef 46 8 Monitor 51 8 1 Generalis Haste n bin on te din exeo cie laaa ei Shae Pa s aki 51 8 2 Addressing euis AA ote odo don e ee dete void Da ei sa a 51 zu M IUE EE 51 9 2 21 LU Minitack s Ite io 54 82 3 MEM RHET 54 8 3 Structure and Organization sssessssssesssseeeeeen eee nennen 54 vi Revision 3 11 2000 LTU NTU Operating Manual SZ DOC W2E 3 pdf Version 1 2 8 3 1 Performance Management PM 00 ccceeeeeeeeeeeeeeeeeeeeeeeaaeaeeeeeeeeeees 55 83 11 Ge26Gommands sss GN bak b ak Lo PI a atl coed 56 8 3 1 2 RESETG826 Comm
46. Z 379 V3 LTU 2 E1 Rev E with 19 subrack SZ 379 V3 NTU E1 Rev E tabletop NTU nx64 Rev E tabletop LTU 2 E1 Rev E minirack NTU E1 Rev E minirack NTU nx64 Rev E minirack REG with housing SZ 372 V3 SZ 371 V3 SZ 371 V2 SZ DOC W2E 3 pdf Version 1 2 SZ 363 V510 SZ 363 V530 SZ 363 V511 SZ 363 V533 SZ 364 V510 SZ 364 V530 SZ 364 V580 SZ 798 V511 SZ 798 V533 SZ 795 V510 SZ 795 V530 SZ 795 V580 SZ 372 V2 Manufacturer Schmid Telecom AG Binzstrasse 35 CH 8045 Zurich The products mentioned above comply with the regulations of the following European Directives 89 336 EEC The compliance of the above mentioned product with the Directive containing requirements in respect requirements of the directive 89 336 EEC is ensured by with electro magnetic compatibility complete application of the following harmonized European Standards EN 300386 2 1998 73 23 EEC The compliance of the above mentioned product with the Directive containing requirements in respect requirements of the directive 73 23 EEC is ensured by with safety requirements complete application of the following harmonized European Standards EN 60950 A4 1997 99 5 EEC The compliance of the above mentioned product with the Directive containing requirements in respect requirements of the directive 99 5 EEC is ensured by with Radio amp Telecommunication Terminal complete application of the following harmonized European Equip
47. about the dying local power supply of the NTU 7 3 Remote Powering Caution 36 Remote power feeding is supported The remote NTU R and the regenerator can be fully powered over the DSL twisted wire pairs from the LTU R The remote power feeding concept has the following characteristics e Per pair remote feeding no phantom circuit e Cross wiring tolerant e Power feeding voltage within TNV Limits max 120Vpc e Independent current limiters on a per pair basis microcontroller controlled e Tolerant against micro interruptions e Automatic system restart after power failure e Protection according to ITU T Rec K 20 The remote power voltage of 120Vpc is generated locally on each LTU R and is referenced to earth In case of overvoltage JU gt 120Vpc the unit is immediately shutdown within 100ms and can be reactivated only after an interruption of at least 500ms of its 48 Vpc supply supplies The LTU is able to feed up to 60mApc over each DSL pair Depending on the DC loop resistance the remote power voltage at the NTU R may be far below 120Vpc The lowest acceptable voltage is approximately 65 Vpc The ability of providing remote power to the DSL line can be permanently switched off by placing the 4 fold R L jumpers located on the PCB from position RPWR A ON RPWR B ON into the OFF position In this case the DSL line interface is disconnected from the remote power circuitry and it behaves like th
48. al Contradirectional Disabled Slave Enabled Normal On On 8 4 2 9 COPY Command The COPY command sets the remote configuration equal to the local and is only available in the remote configuration menu 8 5 Monitor Commands for LTU Minirack TMN Interface For Minirack versions of the LTU the address number of the DSL interface can be set manually by monitor commands in the Configuration Management CM menu After power up of a Minirack LTU always the local monitor main menu appears with the first DSL system activated behaviour like a NTU 62 Revision 3 11 2000 LTU NTU SZ DOC W2E 3 pdf Operating Manual Version 1 2 Address numbers in range 1 127 can be set independently to the different DSL systems of a LTU The alternatives of running the TMN communication on a 2 or 4 wire bus can be selected in the CM menu as well The list below shows the available commands in the Configuration Management menu of a Minirack LTU RESET command DEFAULT command or power down has no influence on settings made for the TMN interface LTU 10 CM H CONFIG Display local configuration G704 ON OFF Set framed mode transparent mode CRC4 ON OFF Set CRC4 mode on off EBIT ON OFF Set automatic E Bit insertion on off AISGEN ON OFF Set AIS generation on off AISDET ON OFF Set AIS detection on off EXTCLK ON OFF Set external clock mode on off POWER ON OFF
49. and s ssssessssssssssssasqsasqnasnnssnnstnnts 61 8 3 2 Fault and Maintenance Management FMM sees 61 8 39 25 SQ Command ren udo Rt ee ae 62 8 3 2 2 SQ REGn Command sesssesssesasenunnannnannnnnnnannnannnntnis 62 8 3 2 3 STARTUP GOMMANJ essa sen seen eee ele sant P e EID 63 8 3 2 4 STATUS Command made seria tiea ason rian nni oho ann anna nn nn nam n hen 64 8 3 2 5 STATUS REGn Command ass ans e e aa a a aaa a a eag jagaa a a 67 8 3 2 6 ALARM COMMANA i A d daa AE Ga a Na a aaa a a a a En Tag a ag nennen 68 83 2 7 AGO COMMANA wo s i ak kak ag ya na tacite keea keea a bea ete eo an a kana baa 70 8 3 2 8 LOOP Command aa aas erecto tp dad san A Ng ab ce Ga dan ee 70 8 3 2 9 LOOP2 COoOmmanGd sasada an sak aran a daun Teka naak EEE ak HI aare d dan nnn w ka daa 71 8 3 2 10 LOOPREGn Command ssssssssssssssssssasssasssasnsssnnstnnss 71 8 3 2 11 STARTAL Command ssss Ng ag a a Ga nga ad sa en aan 71 8 3 2 12 STOPAL Gommnarid rasen kaa aba ab aaa anga bka baga 72 8 3 2 13 TRAGETIME Gommand sawus rane asa a gan en enne 72 8 3 2 14 RESET Command sasa aas aa We La TER aapa E Tak SN aaa retr KAN IG a a nnne 72 8 3 8 Configuration Management CM sese ee nean aane n anana een 72 8 3 8 1 CONFIG Command sssssssssssssssssssssasqaneqnasnnssnnstnnts 73 8 3 3 2
50. ated LTU 01 FMM This command is available on LTU R only 8 3 2 11 STARTAL Command 52 The STARTAL command starts the analog loopback LTU 04 FMM STARTAL 01 04 00 analog loopback started LTU 04 FMM Notes e The system unit must be configured as master for analog loopback operation e Detach the DSL line before starting the analog loopback If the analog loopback is started while a remote station is attached to the DSL line the remote station signal will interfere with the loopback signal causing bit errors on the El side e To return to normal operation restart the system either by power up or RESET command or use the STOPAL command Revision 3 11 2000 LTU NTU SZ DOC W2E 3 pdf Operating Manual Version 1 2 8 3 2 12 STOPAL Command The STOPAL command stops the analog loopback LTU 04 FMM STOPAL 02 04 00 analog loopback stopped LTU 04 FMM 8 3 2 13 TRACETIME Command The TRACETIME command allows the user to change the trace display repetition time range 1 20 sec LTU 04 FMM TRACETIME 3 04 10 30 trace time changed to 03 sec LIU 04 FMM TRACETIME 1 04 20 10 trace time changed to 01 sec LTU 04 FMM 8 3 2 14 RESET Command By typing RESET the system unit will be restarted LTU 04 FMM RESET 05 06 10 system reset Option R Resets the remote station supported by master only Note On a Dual LTU both systems will
51. bit s Connector 10 3 1 User Interface Type A female SubD25 connector is used for all modes The table below depicts the pin out of the connector for the different modes according to RS 530 ISO 2110 and the signal levels used for the signals 13 25 Front View SubD25 female 14 Revision 3 11 2000 7i SZ DOC W2E 3 pdf LTU NTU Version 1 2 Operating Manual ITU T Number Signal Level Pin Nr io V 35 V 36 X 21 V 35 V 36 X 21 1 FGND FGND FGND V 11 V 11 4 i 105 105A CA V 28 V 11 V 11 5 O 106 106A IA V 28 V 11 V 11 6 0 107 107A V 28 V 11 8 0 109 109A V 28 V 11 9 o 115B 115B BB V 35 V 11 V 11 10 o 109B V 11 11 i 113B 113B XB V 35 V 11 V 11 13 0 106B IB V 11 V 11 14 i 103B 103B TB V 35 V 11 V 11 15 o 114A 114A SA V 35 V 11 V 11 16 o 104B 104B RB V 35 V 11 V 11 115A BA V 35 V 11 V 11 18 i 141 141 V 28 V 10 19 i 105B CB V 11 Hh 20 i 108 2 108 2A BIA V 28 V 11 V 11 140 V 28 V 10 22 jo J10B AJ 9 JVff 23 i 108 2B BIB V 11 V 11 24 i 113A 113A XA V 35 V 11 V 11 25 e 142 142 V 28 V 10 The ITU T Numbers are according to ITU T V 24 V 35 V 36 and ITU T X 24 X 21 ITU T Number Description From To DCE DCE 102 G SGND Signal Ground 103 T Transmitted data X 104 R Received data X 105 C Request to send X 106 Clear to send x 107 Data set ready x 108 2 Data
52. ceiver Revision 3 11 2000 LTU NTU SZ DOC W2E 3 pdf Operating Manual Version 1 2 13 2 Referenced Documents 1 EN 55024 Information technology equipment Immunity characteristics Limits and methods of measurement CISPR 24 1997 modified 2 EN 55022 Information technology equipment Radio disturbance characteristics Limits and methods of measurement CISPR 22 1997 modified 3 EN 300 386 2 Electromagnetic compatibility and radio spectrum matters ERM Telecommunication network equipment Electro Magnetic Compatibility EMC requirements Part 2 Product family standard 4 EN 60950 Safety of Information Technology Equipment Including Electrical Business Equipment 5 ETS 300 011 Integrated Services Digital Network ISDN Primary rate user network interface Layer 1 specification and test principles 6 ETS 300 019 Equipment Engineering Environmental Conditions and Environmental Tests for Telecommunications Equipment 7 ETS 300 046 Integrated Services Digital Network ISDN Primary rate access safety and protection 8 ETS 300 233 Integrated Services Digital Network ISDN Access digital section for ISDN primary rate 9 ETSI TS 101 135 V1 5 1 Transmission and Multiplexing TM High bit rate Digital Subscriber Line HDSL transmission system on metallic local lines HDSL core specification and applications for 2048 kbit s based access digital sections
53. ces and especially if different reference ground levels are applied at both ends of the bus different racks Plug in versions of ACU and CMU offer jumpers to connect a simple 120 2 parallel termination to both differential wire pairs of the TMN bus ACU Plug in Closing J4 and J5 will activate the termination CMU Plug in Closing jumper ST4 and ST5 will activate the termination More for reasons of avoiding excessive ground currents than for signal quality the grounding configuration for the signal return path shown in Figure 4 12 is recommended for a TMN bus connections with different ground levels at both ends CMUMR LTUMR Tx B Ki Tx B iu A xo ER das Rx A i z Z 000 i IRx A RxB a IRx B x ATxB Rx ARxB Logic Ground 2 Logic Ground 1 LTUMR Figure 4 12 Termination for Long TMN Bus Revision 3 11 2000 LTU NTU SZ DOC W2E 3 pdf Operating Manual Version 1 2 5 Performance Monitoring The transmission performance of a DSL link can be monitored in two different ways The DSL signal quality is typically used during installation and maintenance procedures whereas the G 826 error performance parameters are intended to be used for long term evaluation of an operating DSL link Refer also to the SQ and G826 monitor commands described in the Monitor Operation chapter 5 1 Noise Margin The Noise Margin NM provides qualitative pe
54. ck 11 1 6 External Clock aas a cee GA Ka Na Ta aga Gaga 1127 Power Supply 22a Ree 11 211 VETUS spa cio te ecce o kon ob sad oka a Bb ah na aha eat a 1 1522 ONT Ucn aa rs HEC as cfe t E dris 11 29 REQ W VO o lem A GA a alea TAS ENVIDONMENT zt e se east 11 3 1 Climatic Conditions eeeseeeeeeeeees 11 9 2 Safety i aj lusta ten a eet eee cocer ure ei Dag 11 38 EMG innert ee rp T a ray Pang kan ekaj sik pa ara a Pea 11 4 Physical Dimensions ococcccocononnccccnncnncnnnonncnccnnancn nn ona nancnnnnnos 11 44 Uin E 1142 NTU ss ke setan e epe ee e ke ean oe 12 Diagnostics and Troubleshooting sssssssssnnnnnnnnnnnnannnn 12 11 uikestlloops ss eee RUN Leeds 12 2 Hints for Troubleshooting sse 13 Appendix 129 13 1 Abbreviations x or eerie tee recien repe Den EE e ee fag Techn 13 2 Referenced Documents ooocococococcccccnnconcnnnnnncncnnnnncnnnnnnnancnnnanos Figures Figure 4 1 Clock SOUFCEBS occococonocccccnncccnononnnncnnnnncnnononnnnnnanancnnnnnns Figure 4 2 Synchronous Operation Loop Timing Figure 4 3 External Clock Mode sese Figure 4 4 Reference Points of the PRA Figure 4 5 Digital Link without CRC Processing Figure 4 6 Digital Link with CRC Processing in the NT1 Figure 4 7 Digital Link with CRC Pr
55. co DIT Mee lay laj El 75 Ohm El 750 n Out x AC DC Adapter Monitor Alarm po foes Me Power O j C O O Rem loc TI me LO ee mo BC Li lav nx64kbit s ma AC DC Adapter Monitor Aam 1 120 Ohm nx 4kbit s Power ar Hce 9 2 Minirack NTU Front Panel El 1200 O label 2 1 Lobel 2 2 G9 amp Sz 795 SA GO Mentot Alan EI 120 Orm boli TE NN s ka Ce o 8 ov dp qo olid EB szem o El 75Q Label 2 1 Label 2 2 69 O El 750m in O 9 275 sd a Ma Nan wa eum DS DO CE oV JG o0 a a E 2 Schmid e o O nx64kbit s CS a Label 2 1 Label 2 2 SQ CO az 795 S amp Montor Alam El 120 Ohm rekti id Mond er Mai ra Ce o e ov 7dp do o LJ EM semo 66 Revision 3 11 2000 LTU NTU SZ DOC W2E 3 pdf Operating Manual Version 1 2 9 3 Plug in LTU Front Panel SV LU SV SY se se se se A E lt 2 ey u 2 MZ PP G Q Q 001 001 Sh ar EN EN ex E ex m N N N N GI N a N a N Koj Koj koj a a loj g 2 5 5 g S A S og e o SI R SE b M of a OO Sa Na KA s 39 of Y
56. de Phase Modulation International Telegraph and Telephone Consultative Committee Common Channel Signaling Control and Management Unit Cyclic Redundancy Check Digital Subscriber Loop ITU T G 703 User Interface at 2048 kbit s Exchange Termination Embedded Operations Channel Errored Second Ratio G 826 Frame Alignment Signal Failure Condition Far End Block Error Fractional E1 High Bit Rate Digital Subscriber Loop HDSL Regenerator Present 91 SZ DOC W2E 3 pdf Version 1 2 ISDN ITU T LFA LFA L LFA S LOS L LOS S LT LTU MSDSL NC NEXT NM NT NTU PDH PRA RCBE RRBE SDH SESR SMF SNMP SQ TE TMN Tx UIF UTP XVR 92 LTU NTU Operating Manual Integrated Services Digital Network International Telecommunication Union Loss of Frame Alignment Loss of Frame Alignment DSL Loss of Frame Alignment Subscriber Loss of Signal Loss of Signal Subscriber side Line Termination Line Termination Unit Multi rate Symmetrical DSL Not Connected Near End Cross Talk Noise Margin Network Termination Network Termination Unit Plesiochronous Digital Hierarchy Primary Rate Access Regenerator Central Block Error Regenerator Remote Block Error Receive Synchronous Digital Hierarchy Severely Errored Second Ratio G 826 Sub Multiframe Simple Network Management Protocol Signal Quality Terminal Equipment Telecommunication Management Network Transmit User Interface Unshielded Twisted Pair Trans
57. e DSL interface of a NTU i e it is floating If changing the remote powering condition the LTU must not be connected to the power supply For the LTU in minirack the external power supply should be disconnected first before opening the cover Revision 3 11 2000 LTU NTU SZ DOC W2E 3 pdf Operating Manual Version 1 2 Remote powering depends strongly on the power consumption of the NTU or REG Which in turn depends slightly on the supply voltage as well as the loop resistance wire diameter and cable length Remote Powering of 2p NTU Ug 113V 0 028 0 026 0 024 0 022 Line Feed Current A 0 500 1000 1500 2000 2500 3000 Loop Resistance Ohm Figure 7 16 Line feed current vs loop resistance for different NTU power consumptions Remote Powering of 2p REG NTU Ug 1 13V Mi reve iJ 0 055 current limit 55mA P1 3 8 P2 2 75 W 0 09 P1 3 3 P2 2 5 0 045 0 04 0 035 Line Feed Current A 0 03 0 025 0 02 0 100 200 300 400 500 600 700 800 900 1000 Loop Resistance Ohm Figure 7 17 LTU powering one REG and one NTU Line feed current vs loop resistance two different REG power consumptions Revision 3 11 2000 37 SZ DOC W2E 3 pdf LTU NTU Version 1 2 Operating Manual Remote Powering of 2p REG REG Ug 113V P1 3 8 P2 3 8 W current limit 55mA P1 3 3 P2 3 3 W Line Feed Current A 0 03 L L L L L L 1 1 L 0 100 200 300 400 500 600 700 800 900 1000 Loop Resistance
58. e chapter Power concept for further information e Optional Configure the unit Connect a VT100 terminal using the serial monitor cable to the Monitor connector of the unit or of the subrack Important Check DSL mode configuration master slave There must be a master unit connected to a slave unit for proper operation The configuration of a slave unit can also be done via the master unit Refer to chapter Monitor Operation for detailed information e Check the proper operation The LED Local lights green in normal operation In slave mode the LED Remote is off but should light green for normal operation in master mode See chapter Alarm Indication for further information Watson modems are generally very easy to install usually just plugged to the DSL line and to the network If more configuration is needed the operator is supported by comprehensible menus default settings plausibility checks and helpful warning messages This way the operator can easily control the wealth of powerful functions that Watson modems provide 3 3 Installation Requirements Installation of this equipment has to be done by qualified personnel only To achieve safety and satisfactory EMC performance the plug in LTU has to be inserted into the subrack Subrack slots that are not used have to be covered with blanking plates The subrack or minirack must be bonded to earth This is usually achieved by installing the subrack or
59. e still valid as in normal PRA operation mode option 4 NT2 END Ee ROT mo ET R lt G L L gt G M R Digital Link T V3 L Local em nu information H Remote CRC error information M CRC Monitor Mies G CRC Generator vwe Optiona SN Storage for network side monitor SU Storage for user side monitor Figure 4 8 Digital Link with CRC Monitoring in the NT1 Depending on the distribution of NT1 and LT functionality two setups are possible for option 1 e The master is El configured transparent AIS generation on and AIS detection off the slave is PRA NTI amp LT CRC4 monitoring on e The master is PRA LT with CRC4 processing off the slave is PRA NTI with CRC4 monitoring on 4 3 3 Generation of CRC4 Error Notifications to the ET 18 For enhanced maintenance capabilities CRC4 errors detected at the interface at the T reference point may optionally be reported to the ET see ETS 300 233 section 8 3 and table 4 of ITU T Rec G 962 section B 5 and table B 2 CRC blocks in error detected at the T reference point of the NT1 as well as CRC error indications received from the NT2 TE in the E bits are reported to the ET by using the Sa6 bits An ET applying asynchronous detection of the Sa6 bits no synchronization of the Sa6 bits to the sub multiframe will misinterpret such CRC4 error reports from the NT1 with other defect indications
60. ed time slots TS18 TS31 are filled with all ones AIS at the receive end If the active channel fails the receivers will immediately switch to the standby channel and application data may be lost for a short time only due to the reallocation procedure If the standby channel fails only this channel is restarted and no application data will be lost 4 1 3 Autorestart This option enables disables automatic DSL channel restart according to the ETSI TS 101 135 This specifies an automatic DSL restart after a 2s loss of DSL synchronization 10 Revision 3 11 2000 LTU NTU SZ DOC W2E 3 pdf Operating Manual Version 1 2 4 1 4 Time Slot Mapping User interface time slots are mapped onto the DSL frame according to ETSI TS 101 135 4 2 E1 Interface 2 Mbit s G 703 G 704 4 2 1 Framing 4 2 1 1 Transparent Mode In transparent mode the El data will be transmitted without any changes whereas in framed mode the frame multiframe alignment words and CRC4 bits are regenerated by the E1 framer The CRC4 and E bit Insertion options are not relevant in transparent mode 4 2 1 2 Framed Mode ITU T G 704 In framed mode framing according to ITU T G 704 the incoming El data stream passes through an El framer before entering the DSL section From the other side the same process happens in reverse the El data stream received from the DSL section first passes through the El framer before being transmitted to the El network
61. erated from the transmit clock used at the El port The 2048kHz El clock is fractionally synthesized to the bitrate configured and available at the contradirectional transmit clock output circuit 114 e Internal The transmit clock is generated from the internal reference clock contradirectional circuit 114 e Remote The transmit clock is the recovered remote clock i e the same clock as the receive clock 115 at the V 35 and V 36 interface contradirectional circuit 114 The clock mode to be used depends on the individual network configuration e nx 64kbit s n x 64kbit s connection First it should be checked whether the equipment connected to the n x 64kbit s port uses a transmit clock output or input In the first case the codirectional nx64 port mode can be used In the latter case one of the contradirectional clock modes should be used The internal clock mode should be suitable in most cases the remote clock can be used if the receive and transmit clocks have to be equal As the contradirectional X 21 clock modes use only one clock these configurations are possible n x 64 Port n x 64 Port n x 64 Port Remote Internal Remote e nx 64kbit s El connection The clock mode can be selected as in the previous case e nx 64kbit s Ethernet connection Ethernet modems have the same restrictions as prior n x 64kbit s equipment The receive and the transmit clocks have to be equal Therefore the network can have only one
62. for V 35 ISO 4902 for V 36 ISO 4903 for X 21 both for operation as DCE or DTE are available by means of adapter cables Loop 1 and Loop 2 supported for V 35 and V 36 they can also be controlled by circuits 140 RL and 141 LL according to V 54 Support for byte timing circuit B in X 21 mode Mixed mode n x 64kbit s El n x 64kbit s Ethernet possible 4 4 2 Configuration 4 4 2 1 Time Slot Mapping 4 4 2 1 1 Terminology In the following time slot numbers O to 31 denote the positions where El time slots 0 to 31 are mapped to the DSL frame according to TS 101 135 The n x 64kbit s bandwidth is the bit rate which is available for the n x 64kbit s interface for equipment with both E1 and n x 64kbit s interface the n x 64kbit s bit rate for equipment with configurable DSL line rate and no El interface the DSL line rate 16kbit s for equipment with fixed DSL rate and no El interface 32 x 64kbit s The El bandwidth is the bit rate which is available for the El interface Revision 3 11 2000 for equipment with both E1 and n x 64kbit s interface the El bit rate 19 SZ DOC W2E 3 pdf LTU NTU Version 1 2 Operating Manual e for equipment with configurable DSL line rate and no n x 64kbit s interface the DSL line rate 16kbit s e for equipment with fixed DSL rate and no n x 64kbit s interface 32 x 64kbit s The mapping of the n x 64kbit s data to the time slots 0 to 31 depends on the n x 64kbit s bit
63. he G 826 error performance parameters back to zero 04 35 30 LIU 04 PM LTU 04 PM RESETG826 G 826 error performance parameter reset 8 3 2 Fault and Maintenance Management FMM 04 2 41 20 Fault and maintenance management activated type lt M gt to return to MAIN or lt H gt for HELP information Type lt H gt and the monitor lists all available commands in the fault and maintenance sub menu LTU 04 FMM H SQ SQ REGn STARTUP TATUS TATUS R LOOP 1 LOOP2 OOPREGn S S STATUS REGn ALARM A A LARM R LARM T ON OFF ON OFF ON OFF ON OFF TART STOPAL AL TRACET IME 1 20 quality trace on off regenerator signal quality trace on off rtup trace on off Turn HDSL signal Turn Turn HDSL transceiver sta Display local system status Display remote system status Display regenerator status Display local alarm status Display remote alarm status Turn alarm trace on off Activate deactiva Activate deactiva Le Le ala local rm cutoff loopback Activate deactiva Activate deactiva Le Le Start analog loopback Stop analog loopbac Change trace time Reset system Reset remote statio Return to main menu K 1 remote loopback regenerator loopback 20 seconds LTU 04 FMM 8 3 2 1 SQ Command The SQ command a
64. he clock sources are automatically switched by the microcontroller depending on the actual signal and clock status which is updated every 100 ms The transmit clocks of the two El data directions are independent of each other Both plesiochronous and synchronous operation modes are possible Synchronous operation occurs when the E1 equipment at one end of the DSL link uses the receive clock as transmit clock as shown below E1 Equipment E1 Equipment 2048 kHz Clock ELNTU DSL EINTU pr LTU LTU 2 Figure 4 2 Synchronous Operation Loop Timing Do not configure the El interfaces at both ends to use the receive clock as transmit clock except if one DSL equipment is an LTU using the External Clock option Otherwise there will be no defined clock 4 2 4 2 External Clock Mode 2 Mbit s INP 2048 kHz Figure 4 3 External Clock Mode In External Clock mode the 2048kHz input clock is fed directly in the LTU in case of the minirack or via the ACU clock input in case of the plug in LTU The external clock is used as the El reference clock If the External Clock option is enabled the primary El clock source is the external clock If no external clock is present at the 2048kHz clock input the El transmit clock is used as the clock source If no signal is received at the El port then the internal clock is used as the clock source If the External Clock option is disab
65. ilable on the LTU R only During regenerator loopback the status of SYNC CA and SYNC CB shows 02 due to the loopback location inside the regenerator 8 3 2 6 ALARM Command The ALARM command displays the actual alarm status LTU 04 FMM ALARM Options R Displays the status of the remote station supported by master only T Turns alarm trace on off 50 Revision 3 11 2000 LTU NTU Operating Manual 8 3 2 7 ACO Command Definitions LOS S LFA S AIS S BER S EXT LOC LFA V3 AIS V3 LOS LFA A LOS LFA B BER REG H BER REG L BER H BER L AIS R LOOPI LOOP2 ACO ALB CLDET A CLDET B REG A REG B LOOPREG SZ DOC W2E 3 pdf Version 1 2 Loss of signal at subscriber E1 side Loss of frame alignment at subscriber El side AIS Alarm Indication Signal detected at subscriber E1 side Excessive Block Error Rate on subscriber side If CRC4 enabled BER S on if more than 805 CRC4 Errors per second If CRC4 disabled BER S on if more than 28 FAS Errors per second Loss of external clock Loss of frame alignment at V3 reference point PRA mode Alarm indication signal at V3 reference point PRA mode Loss of signal or frame alignment at DSL loop A Loss of signal or frame alignment at DSL loop B DSL block error rate at regenerator according to G 826 2 30 DSL block error
66. independently to the different DSL systems of a LTU Revision 3 11 2000 LTU NTU SZ DOC W2E 3 pdf Operating Manual Version 1 2 8 2 3 NTU There is no need of addressing for a point to point connection 8 3 Structure and Organization The structure and organization of the monitor menu is adapted to ITU T M 3400 for TMN with its five sub sets Sub set Short form Performance management Fault and maintenance management Configuration management Accounting management Security management Since accounting management is not supported AM is not in the monitor s main menu Watson II El Monitor V4 2 Copyright C 95 98 99 by Schmid Telecom AG Zuerich Switzerland Main Menu Performance management PM Fault and maintenance management FMM Configuration management CM Security management SM Exit OB VIGH LTU 04 Select 1 5 To select the desired sub menu type the appropriate number Notes The Exit command number 5 is only available on the LTU To address another LTU type PSN 8 3 1 Performance Management PM The G 826 error performance parameters are intended to be used for long term evaluation of operating DSL links see chapter Performance Monitoring Revision 3 11 2000 41 SZ DOC W2E 3 pdf LTU NTU Version 1 2 Operating Manual 03 33 10 Performance management activated type M to return to MAIN or H for HELP inf
67. ion 1 a digital link with CRC processing in the NT1 option 2 or a digital link with CRC monitoring only in the NT1 option 4 A digital link with CRC processing in the LT and NT1 is possible by using an DSL link consisting of an NTI and an LT both configured with CRC processing on 4 3 2 1 Digital Link without CRC Processing Option 1 In this mode transparent transmission between the ET and the NT2 TE is possible There is no CRC4 processing in the PRA NTU the CRC processing is only done in the ET and the NT2 TE When loss of incoming signal is detected on either side AIS is transmitted at the opposite side The detection of events and the state information are still valid as in normal PRA operation mode option 2 Depending on the distribution of NT1 and LT functionality two setups are possible for option 1 e The master is El configured transparent AIS generation on and AIS detection off the slave is PRA NTI amp LT CRC4 processing off e The master is PRA LT with CRC4 processing off the slave is PRA NTI with CRC4 processing off Note For proper operation in Option 1 the equipment at the customer side NT2 and at the central office side ET must be in CRC4 framed mode Revision 3 11 2000 15 LTU NTU SZ DOC W2E 3 pdf Operating Manual Version 1 2 NT2 ET n i G Digital Link a L G M R T V3 L Local CRC error information R Remote CRC error information Mandatory M
68. ion of the TMN bus in the backplane towards a second subrack is realized by means of the Alarm Control Unit ACU 24 Revision 3 11 2000 LTU NTU SZ DOC W2E 3 pdf Operating Manual Version 1 2 Management Center 2c Front Connector Backplane LIU Connector TxB RxARxB EIA 485 Backplane Bus Subrack0 Front Connector Backplane Connector EIA 485 Backplane Bus Subrack 1 Figure 4 11 TMN Bus 2 Wire Connection for Plug in Units Limitation Plug in versions of CMU ACU and LTU support 2 wire connection only In case of a single subrack configuration and if no external alarm indications have to be controlled an ACU is not needed in the subrack But direct access for configuration of LTUs via the monitor interface on a local craft terminal is not possible without an ACU 4 5 3 TIA EIA 485 Bus Termination In order to achieve highly reliable connections with a minimum of reflections a termination with 120Q is required at both ends of the bus by the TIA EIA 485 standard A bus termination is not imperative when transmission is applied over short distances 1m and with signalling rates 200 kbps Revision 3 11 2000 25 SZ DOC W2E 3 pdf LTU NTU Version 1 2 26 Operating Manual The TMN bus communication is running with a signalling rate of 5 kbps Due to this fact a termination is required only if TMN bus is extended via cable over long distan
69. ith CRC4 option enabled In framed mode with CRC4 option disabled only FAS errors are detected 28 Revision 3 11 2000 LTU NTU SZ DOC W2E 3 pdf Operating Manual Version 1 2 5 2 3 ISDN PRA Interface Slave NTU PRA Master LTU or NTU EI transp CRC4 T CRC4 V3 CRC6 CRC6 Test a DSL BE G 826 Channels A 8 B Evaluation Test 4 gt Gen E Bi G 826 uw Figure 5 15 PRA G 826 Performance Evaluation When the PRA interface is working with CRC4 processing or monitoring options 2 and 4 four CRC4 check bits are generated per sub multiframe SMF received from the ET and the NT2 TE and compared with the corresponding CRC4 bits in the following SMF If they do not match the corresponding CRC4 error counter is incremented At the same time the E Bits from the ET and the NT2 TE are counted and can be used for performance monitoring For the PRA interface calculations according to G 826 are only possible when CRC4 processing or monitoring is selected Revision 3 11 2000 29 LTU NTU SZ DOC W2E 3 pdf Operating Manual Version 1 2 6 Alarms 6 1 LEDS The two LEDs Status Local and Status Remote are used to display normal operation condition and alarm condition Each LED can be green amber or red according to the following table 6 1 1 Status LEDs Status Local LED Remote LED Power failure off off Hardware
70. itor Connector LTU in Minirack Type SubD9 female Front View 1 2 3 4 5 6 7 8 5 1 re ooo 0 O O oo 9 6 Pin Signal Description 1 RS 232 Signal Ground 2 RS 232 Transmit Data 3 RS 232 Receive Data 4 5 RS 232 Signal Ground 6 7 8 9 Use a standard RS 232 cable female male SubD9 for connection to a computer or terminal 10 6 48Vpc Power Connector NTU Revision 3 11 2000 79 SZ DOC W2E 3 pdf LTU NTU Version 1 2 Operating Manual Type Molex Minifit Junior safety approved connector to the line adapter with snap in characteristic Frontview Molex Type Power Connector Pin Signal Description 1 PWR Negative power supply terminal for mains adapter 2 Connected to the center taps of the gas absorbers at the DSL line input 3 Not connected Positive power supply terminal for mains adapter 10 7 48Vpc Supply Minirack Type Molex safety approved connector to the line adapter with snap in characteristic Frontview Molex Type Power Connector Pin i Description 1 Not connected 2 Not connected 3 Negative terminal for battery power supply fused 4 Positive power supply terminal 80 Revision 3 11 2000 LTU NTU SZ DOC W2E 3 pdf Operating Manual Version 1 2 10 7 1 Mains Connector Minirack LTU only Contains the 230 115V selector and two IEC127 fuses The values for the fuses are 2xT500mA for 115V a
71. k 1 8 FC4 12 Loopback 2 13 Loopback 2 amp FC4 14 Loopback 1 amp NTU dying 15 Loopback 1 amp NTU dying amp FC4 16 Loopback 2 amp NTU dying 17 Loopback 2 amp NTU dying amp FC4 18 AIS 19 AIS amp FC4 Note With an LTU L the RPF and RPS will always display 00 Options R Displays the status of the remote station supported by master only 8 3 2 5 STATUS REGn Command This command is only available on the LTU R and reads the status of the n regenerator over EOC LTU 04 FMM STATUS REGI 05 50 10 reading status from regenerator 1 LTU 04 FMM Regenerator Status 1 Vl 3 Revision 3 11 2000 49 SZ DOC W2E 3 pdf LTU NTU Version 1 2 Operating Manual SYNC RA 02 SYNC CA 02 SQ RA 19 5 SQ CA 19 0 SYNC RB 02 SYNC CB 02 SQ RB 19 0 SQ CB 19 0 LTU 04 FMM Definitions shown for loop A loop B similar Parameter Status Meaning SYNC RA Status of DSL synchronisation state machine of loop A at REG R LTU side of regenerator according to ETSI TS 101 135 00 Out of Sync State 02 In Sync State Note This parameter does NOT suffice as an indication for an established DSL link SYNC CA Status of DSL synchronisation state machine of loop A at REG C NTU side of regenerator state coding as above SQ RA Signal quality of loop A at REG R LTU side of regenerator dB SQ CA Signal quality of loop A at REG C NTU side of regenerator dB Note This command is ava
72. led the primary El clock source is the 2Mbit s transmit clock If no signal is received at the El port then the internal clock is used as the clock source The external clock is never used to drive the El Rx direction Revision 3 11 2000 13 SZ DOC W2E 3 pdf LTU NTU Version 1 2 Note Operating Manual There is neither an external clock input nor a clock output on the NTU side The El Tx clock rate is defined by the incoming El Tx data rate The Rx clock rate is the recovered Tx clock rate of the remote side or the local internal clock The primary E1 Rx clock source is the recovered 2048kHz clock 4 3 ISDN PRA Interface 14 In PRA mode the DSL modem offers the functions of an ISDN PRA NTI a LT ora combination of the functions of NTI and LT This makes it possible to use two setups e The slave modem at the customer premises is configured as NT1 the master modem at the central office is configured as LT e The slave modem at the customer premises is configured as NT1 amp LT Direct access to the exchange is established by a bit transparent DSL Link Al data including time slot 0 from the exchange must be transmitted transparently also time slot 0 to the PRA NTU therefore the DSL equipment providing the line termination is El working in transparent mode see Figure 4 4 DSL Link Figure 4 4 Reference Points of the PRA Normally the PRA digital section NTI and LT is configured as
73. lignment Signal received on the 2Mbit s El side The criteria for severely errored seconds SES is 28 FAS Errors per second in accordance to G 821 In PRA mode the G826 El command displays the ITU T G 826 error performance parameters on the PRA 2Mbit s LTU 04 PM G826 El Errored Blocks Errored seconds Severely errored seconds 00000000 00000000 00000000 0 00 0 00 0 00 00524129 00000024 00000000 00000000 00000000 0 00 0 00 0 00 00524129 00000024 00000000 00000000 00000000 0 00 0 00 0 00 00524107 00000046 00000000 00000000 00000000 0 00 0 00 0 00 00524107 00000046 LTU 04 PM Definitions 1 CRC4 T Cyclic redundancy check indicating errored sub multiframes received at the NTI side of the T reference 2 E Bit T CRC 4 indication bit indicating received errored sub multiframes at the NT2 TE side of the T reference point 3 CRC4 V3 Cyclic redundancy check indicating errored sub multiframes received at the NTI side of the V3 reference point Revision 3 11 2000 LTU NTU Operating Manual SZ DOC W2E 3 pdf Version 1 2 4 E Bit V3 CRC 4 indication bit indicating received errored sub multiframes at the ET side of the V3 reference point Note CRC4 monitoring is selected in the configuration 8 3 1 2 RESETG826 Command The G826 El command is only available if option 2 CRC4 processing or option 4 The RESETG826 command sets t
74. llows the user to turn the signal quality trace on and off LTU 04 FMM SO 04 53 30 HDSL 04 53 30 HDSL 04 54 30 HDSL Revision 3 11 2000 signal quality trace on noise margin local A B noise margin local remote A po Be x A 19 5 B 19 5 remote A 19 5 B 19 5 dB dB 45 SZ DOC W2E 3 pdf LTU NTU Version 1 2 04 55 30 LTU 04 FMM SO 04 56 30 LTU 04 FMM Note Operating Manual HDSL noise margin local A 19 5 B 19 5 remote A 19 0 B 19 5 dB HDSL signal quality trace off If configured as master both local and remote signal quality signal quality at remote station are reported if configured as slave only the local signal quality is reported The master periodically reads the signal quality from the remote station via EOC If no valid signal quality value was able to be communicated from the slave to the master since the last trace output will appear instead of the signal quality value 8 3 2 2 SQ REGn Command The SQ REGn command allows the user to toggle the signal quality trace of the n regenerator on and off LTU 04 FMM SQ REGI regenerator 1 signal quality trace on 05 05 05 05 05 05 07 08 10 11 40 07 40 09 40 40 40 40 RI RI RI RI RI EGI noise margin REG R A Ba REG C A B dB EGI noise margin REG R A 20 0 B 19 5 REG C A 19 0 B 19 0 dB EGI noise margin
75. ment Standards EN 300386 2 1998 EN 60950 A4 1997 The compliance of the above mentioned products with the specified requirements of the applicable directives and harmonized and non harmonized standards is shown in the following internal and external test reports SZ QDOC W2E pdf and W2E Test Reports pdf CE Label attached to the product s on minirack on tabletop on 19 subrack for LTU only Issued by Schmid Telecom AG Binzstrasse 35 CH 8045 Zurich Place and date Zurich 3 11 2000 Signatures Signature 1 Signature 2 nii A fi A Dr Lothar Schultheis Revision 3 11 2000 Walter Buchel SZ DOC W2E 3 pdf LTU NTU Version 1 2 Operating Manual iv Revision 3 11 2000 LTU NTU SZ DOC W2E 3 pdf Operating Manual Version 1 2 Contents 1 The Watson 2 Family enini ceo a a Aaina ai adaa 1 2 General INPOrMAtiON skk EE P 3 2 1 Important Satequatds ss pusis e iUe a EET ERE EH REGERE NOE ees 3 2 2 Ordering Information aa poet Lent teen ds Dc p are 5 a GE eM A OE Lei DEL eh RUM Dad 5 2 2 2 NV Uso o odo a KN dio de Ne ceti e ete etui 5 223 REG aide eee ie fo abe to ed beta inb fee 6 2 2 4 ACCESSONES ssi ree eoe ed dug aa ei ag vie Dl a 6 3 Installation Guide sun E SO eve yep oct eaa Deoa NT aaa eyes op a anoo VET OE Das 7 A tetro e eb e eie be bee Le De ate ea eco Lt pee abet 7 3 2 Installing a Watson Modem
76. minirack into a rack which is connected to the earthing network according to ETS 300 253 Additionally on the subrack an extra earth terminal for connection to the FPE connector Functional Protective Earth is provided 8 Revision 3 11 2000 LTU NTU Operating Manual SZ DOC W2E 3 pdf Version 1 2 4 Interface Configuration Options 4 1 DSL The following sections describe the various configuration options On the plug in LTU the operating modes are configurable via the V 24 monitor interface or via the TMN interface of the ACU whereas on the minirack LTU table top NTU and minirack NTU they are directly configurable via the monitor interface If the LTU NTU is slave it is also configurable from the master side Only the remote local powering has to be configured via jumpers on the board of the LTU or via slide switches on the NTU The following configuration options refer to the DSL side and do not affect the user interface operating mode except in case of Fractional Partial or Hot Standby operation 4 1 1 Master Slave To start up a DSL link one system unit must be configured as master and the other one as slave The link start up procedure is controlled by the master If both system units are configured as master or as slave no start up will occur Usually the LTU is configured as master and the NTU as slave default setting However it is possible to set up a DSL link with two LTUs or two NTUs as long as one is c
77. n error 4 Errored seconds ES A one second period with one or more errored blocks SES defined below is a subset of ES 5 Severely errored second SES A one second period which contains gt 30 errored blocks 6 Background block error BBE An errored block not occurring as part of an SES Revision 3 11 2000 LTU NTU Operating Manual SZ DOC W2E 3 pdf Version 1 2 7 Errored second ratio ESR The ratio of ES to total seconds in available time during a fixed measurement interval 8 Severely errored second ratio SESR The ratio of SES to total seconds in available time during a fixed measurement interval 9 Background block error ratio BBER The ratio of errored blocks to total blocks during a fixed measurement interval excluding all blocks during SES and unavailable time Options C Updates the G 826 parameters continuously REGn The G826 REGn command displays the ITU T G 826 error performance parameter of the n regenerator LTU 04 PM G826 REGI ESR 5 ESR 5 BER 5 Errored Blocks Errored seconds Severely errored seconds S B Available time Unavailable time 00000000 00000000 00000000 0 00 0 00 0 00 00000221 00000027 00000000 00000000 00000000 0 00 0 00 0 00 00000221 00000027 00000000 00000000 00000000 0 00 0 00 0 00 00000206 00000042 00000000 00000000 00000000 0 00 0 00 0 00 00000206 00000042 LTU 04 PM 1
78. nd for 230V they are 2xT250mA The connector Type is an IEC 320 C14 10 7 2 2048kHz Input Minirack LTU only External Clock Input Type BNC 759 The input is transformer coupled 10 7 3 TMN Alarms Minirack LTU only This is the connector for alarm relay contacts and for the RS485 interface Type SubD15 female Pin Description Protective Ground connected to pin 8 GND RX_485 RS485 Input positive NC Not connected C 2 3 4 TX 4854 RS485 Output positive 5 Not connected 6 NAL NO Non Urgent Alarm Contact Normally Open 7 Urgent Alarm Contact Normally Open 8 SGND 485 RS485 Signal Ground connected to pin 1 9 RS485 Input negative 10 NC Not connected 11 RS485 Output negative 12 NC Not connected 13 Non Urgent Alarm Contact Normally Closed 14 DAL NC Urgent Alarm Contact Normally Closed 15 AL COM Common for Urgent and Non Urgent Alarms Alarm relays Revision 3 11 2000 81 SZ DOC W2E 3 pdf Version 1 2 LTU NTU Operating Manual 11 Technical Specifications 11 1 Interfaces 11 1 1 DSL Line Interface Norm referred ETSI TS 101 135 Number of Pairs Line Rate per Pair 2 1168kbit s 32ppm ETSI Clock Mode Line Code Nominal Line Impedance 2B1Q 1350 Transmit Power 13 5dBm 1350 Signal Bandwidth Overvoltage Protection 0 287kHz 3dB LTU ITU T Rec K 20 NTU ITU T Rec K 21 Connector Type 82
79. nels are restarted and data transmission is interrupted until both channels have been reactivated Fractional Mode In Fractional mode only HDSL channel A is in operation while the transceiver of channel B is switched off Only time slots TSO TS17 of the application frame are transmitted while the unused time slots TS18 TS31 are refilled with all ones AIS at the receive end Partial Mode In Partial mode startup and operation of the two HDSL channels pairs are not synchronized to each other Therefore if one of the HDSL channels fails only the failed channel is restarted while the other channel continues data transmission Time slots TSO TS17 of the application frame are assigned high priority and TS18 TS31 low priority Therefore if one of the HDSL channels fails time slots TSO TS17 are dynamically reallocated to the remaining active channel while time slots TS18 TS31 are filled with AIS until the failed channel has been reactivated If the HDSL channel carrying time slots TSO TS17 fails high priority data may be corrupted for a short time only due to the reallocation procedure If the HDSL channel carrying time slots TS18 TS31 fails high priority data will not be corrupted at all Hot Standby Mode In Hot Standby mode startup and operation of the two HDSL channels pairs are performed in the same way as in Partial mode except that both channels are carrying time slots TSO TS17 of the application frame redundantly The unus
80. nge Circuits between Data Terminal Equipment DTE and Data Circuit Terminating Equipment DCE 22 ITU T V 28 Electrical Characteristics for Unbalanced Double Current Interchange Circuits 23 ITU T V 35 Data Transmission at 48 kbit s Using 60 108 kHz Group Band Circuits 24 ITU T V 36 Modems for Synchronous Data Transmission Using 60 108 kHz Group Band Circuits 25 ITU T V 54 Loop Test Devices for Modems 26 ITU T X 21 Interface between Data Terminal Equipment and Data Circuit Terminating Equipment for Synchronous Operation on Public Data Networks 27 ITU T X 24 List of Definitions for Interchange Circuits between Data Terminal Equipment DTE and Data Circuit Terminating Equipment DCE on Public Data Networks 28 ISO 2593 Connector pin allocations for use with high speed data terminal equipment 1973 29 ISO 2110 Data communication 25 pin DTE DCE interface connector and pin assignments 1980 30 ISO 4902 Data communication 37 pin and 9 pin DTE DCE interface connectors and pin assignments 1980 31 ISO 4903 Data communication 15 pin DTE DCE interface connector and pin assignments 1980 Revision 3 11 2000
81. nnancnnnancnncnnns 53 Figure 12 20 Standard Test Loops sssssssssseeeenen eene nnn nena 125 Figure 12 21 Regenerator Loopback ssssssssseseseeee eene 126 Figure 12 22 Regenerator in Loopback Mode Revision 3 11 2000 ix LTU NTU SZ DOC W2E 3 pdf Operating Manual Version 1 2 1 The Watson 2 Family The Watson II family is a 2B1Q based 2 pair HDSL System It was designed with flexibility and modularity in mind It supports both full and fractional El data rates in either framed or transparent mode and ISDN Primary Rate Access PRA The Line Termination Units LTU are available as 19 subrack card or as minirack version only Dual LTU version The LTU may be configured jumper as LTU L or LTU R The LTU R is capable of remotely powering a remote NTU R and a regenerator i e the LTU R is a remote power source The LTU R is only master configurable whereas the LTU L is both master and slave configurable The regenerator has to be remotely powered via the HDSL line and is available with different housings for outdoor and underground installation The Network Termination Unit NTU is available as a table top unit or as a minirack version The NTU may be configured by a slide switch as either NTU R or NTU L An NTU R is remotely powered by an LTU R whereas an NTU L is powered by a 230V 48V mains adapter An Alarm Control Unit ACU in the subrack enables the connection of the EIA485 bus the EIA2
82. o TIA EIA 485 standard Independent if the bus is set up by a 2 or 4 wire connection the bus communication between Common Management Unit CMU and the Line Termination Units LTUs is always operating in half duplex mode The CMU is representing the Agent Element and is working as bus master on the EIA 485 side The LTUs are representing the modem and work as bus slaves on the EIA 485 side 4 5 1 TIA EIA 485 4 wire Bus The default TMN communication between Minirack versions of CMU and LTU is using a 4 wire transmission with different pairs for receive and transmit direction This bus system requires a crossing of RX and TX signals between CMU and LTU pg lg INN Interface Tx A LTU MR Management Center Figure 4 9 TMN Bus 4 Wire Connection for Minirack Units Revision 3 11 2000 23 SZ DOC W2E 3 pdf LTU NTU Version 1 2 Operating Manual 4 5 2 TIA EIA 485 2 wire Bus TMN communication can be established via an EIA 485 2 wire connection as well In this case no crossing of signals between CMU and LTU is required Management X 25 Center or LAN CMU MR LTUMR LTUMR ARxB TxBTxA xATxB RxARxB xATxB RxARxB Figure 4 10 TMN Bus 2 Wire Connection for Minirack Units A Plug in version of the CMU is available as well Due to the fact maximum 32 units can be connected to an EIA 485 bus 1 CMU is able to handle more than the 12 LTUs located in one subrack The extens
83. ocessing in the LT and NT1 viii LTU NTU Operating Manual Revision 3 11 2000 LTU NTU SZ DOC W2E 3 pdf Operating Manual Version 1 2 Figure 4 8 Digital Link with CRC Monitoring in the NTI e esee lee anane 23 Figure 4 9 TMN bus 4 wire connection for Minirack units esee ieio 30 Figure 4 10 TMN bus 2 wire connection for Minirack units 31 Figure 4 11 TMN bus 2 wire connection for Plug in units eese 32 Figure 4 12 Termination for long TMN bUs ssssee akasttasastossasenssosososooooosne 34 Figure 5 13 Regenerator G 826 Performance Evaluation esses 36 Figure 5 14 E1 G 826 Performance Evaluation sse 37 Figure 5 15 PRA G 826 Performance Evaluation e esee eees esee e nn 38 Figure 7 16 Line feed current vs loop resistance for different NTU power consumptions 48 Figure 7 17 LTU powers one REG and one NTU Line feed current vs loop resistance two different REG power consumptions essssssseseene eene 48 Figure 7 18 LTU powers two REGs Line feed current vs loop resistance two different REG power consumptions saeka eaaa eaaa eaaa aana aaa aaa nennen nennen nent h nne nnns nnne 49 Figure 8 19 LTU Interface Addressing Scheme ooooonocccicccnccncnonccnccncnncnnonn
84. on is sending AIS R If AIS generation is disabled no signal will be transmitted on the El side if either of these two conditions occurs 4 2 3 AIS Detection If AIS detection is enabled receiving AIS from the El side will cause the following actions e The Non Urgent alarm will be set active AIS S e AIS will be transmitted to the remote station by AIS R 4 2 4 E1 Clock Modes 4 2 4 1 Clock Sources The following block diagram shows the possible clock sources for the LTU and the NTU Note that the external clock option is not available for the NTU The clock sources are intended to be references only and do not drive the DSL transmit section physically Data rate adaptation between the 2048kHz clock and the DSL transmit clock is achieved by stuffing deleting bits in the DSL frames The El interface clock is never affected by the crystal controlled DSL clock INP 2048 kHz External clock E1 Side DSL Side p DSL 2 Mbit s Tx Clock Stuff Tx Delete Internal Clock 2048 kHz Clock Recovery DSL Recovered 2048 kHz Clock RX Figure 4 1 Clock Sources Note Signals towards the transceiver section are denoted as Tx and signals coming from the transceiver sections are denoted as Rx 12 Revision 3 11 2000 LTU NTU Operating Manual Warning SZ DOC W2E 3 pdf Version 1 2 As long as the DSL link is not established the internal clock oscillator is used as clock source T
85. on selects the subscriber access option of the whole digital section NTI and LT only if PRA Mode NTI amp LT is selected If NT1 and LT functions run on different modems the CRC4 settings of both modems determine the access option see description of PRA configuration options Set generation of CRC4 error notifications to the ET on off applies only to NT1 Set the user interface type to El or PRA Set remote powering on off Set DSL master mode slave mode Note One unit must be configured as Master DSL side and the other as Slave The master slave configuration affects the whole unit i e both modem of a Dual LTU Set autorestart on off Set HDSL operating mode Normal Fractional Partial Hot Standby Partial and Hot Standby operation are not available if remote power feeding is switched on 55 SZ DOC W2E 3 pdf Version 1 2 8 3 3 3 DEFAULT Command The DEFAULT command sets a default configuration Three default settings are 56 available LTU 01 CM D Local Config EFAULT 0 LTU NTU Operating Manual 2 Mbit s Framing CRC4 E Bit Inse AIS Detect External C HDSL rtion AIS Generation ion lock Master Slave Autorestart Operating Mode Channel A Channel B Remote Powering LTU 01 CM LTU 01 CM D Local Config EFAULT 1 Master Enabled Normal On 2 Mbit s Framing CRC4 AIS Detect External C HDSL E Bit Insertion AIS
86. onfigured as master and the other one as slave In these cases remote powering is not possible Generally the master slave permissions are e The slave unit has only the permission to change its own configuration locally It cannot access nor modify the master unit s configuration or data Access to the slave unit s configuration or data is possible via local monitor or via the master unit e The master unit has local access as well as remote access to the slave unit For safety reasons only the master slave configuration and the autorestart option cannot be altered by the master unit over the DSL link When the Remote LED on the front panel of the NTU is lit the system unit is configured as master 4 1 2 HDSL Operating Modes In this section the various operating modes of the HDSL transceiver pairs are described Revision 3 11 2000 9 SZ DOC W2E 3 pdf LTU NTU Version 1 2 Operating Manual In Fractional Partial and Hot Standby mode remote power feeding is not available since the NTU consumes more power than can be suppled over a single pair on long loops with high DC resistance In Normal mode there are no restrictions on configuration options For Fractional and Partial operation mode also refer to ETSI TS 101 135 sections 7 4 and 7 5 Normal Mode In Normal mode startup and operation of the two HDSL channels pairs are synchronized to each other Therefore if one of the two HDSL channels fails both chan
87. ormation Type H and the monitor lists all available commands in the performance sub menu LTU 04 PM H G826 Display HDSL G 826 parameter G826 C Display HDSL G 826 parameter continuously G826 El Display local El G 826 parameter G826 El C Display local E1 G 826 parameter continuously G826 REGn Display regenerator G 826 parameter G826 REGn C Display regenerator G 826 parameter continuously RESETG826 Reset G 826 error performance parameter M AIN Return to main menu LTU 04 PM 8 3 1 1 G826 Command 42 The G826 command displays the ITU T G 826 error performance parameters on the DSL line side of the local and remote DSL unit LTU 04 PM G826 G 826 Error Performance CRC6 A CRC6 B FEBE A FEBE B Errored blocks 00000000 00000000 00000000 00000000 Errored seconds 00000000 00000000 00000000 00000000 Severely errored seconds 00000000 00000000 00000000 00000000 ESR 2 0 00 0 00 0 00 0 00 SESR 5 i 0 00 0 00 0 00 0 00 BBER i 0 00 0 00 0 00 0 00 Available time 00624483 00624483 00624483 00624483 Unavailable time 00000024 00000024 00000024 00000024 LTU_04_PM gt Definitions 1 CRC6 Cyclic redundancy check indicating errored blocks are being received on the local DSL side 2 FEBE Far end block error indicating errored blocks are being received on the remote DSL side 3 Errored block EB A block in which one or more bits are i
88. pback 2 in the remote slave NTU LTU These output interchange circuits are set Master 107 ON and 142 ON Slave 104 received data 1 106 OFF 107 OFF 109 OFF and 142 ON 4 4 2 6 3 Automatic Loop Control through the DTE DCE Interface Automatic control through the interface is achieved by using circuits 140 and 141 e 140 2 ON and 141 OFF V 54 loop 2 DSL loopback 2 e 140 OFF and 141 ON V 54 loop 3 DSL loopback 1 22 Revision 3 11 2000 LTU NTU SZ DOC W2E 3 pdf Operating Manual Version 1 2 This automatic loop control can be switched on off using the V54LOOPS configuration option The interface on the user side can be a DTE or a DCE To connect them to the interface port the V 35 DTE or V 35 DCE cable must be used 4 4 2 7 Byte Timing In the X 21 mode the byte timing circuit B according to X 24 can be activated configuration option BYTETIMING As the circuits B byte timing and X codirectional transmit clock share the same pins on the 15 pin ISO 4903 connector separate cables have to be used for these cases 4 5 TMN Interface Minirack LTU only The Telecommunication Management Network TMN is connecting the Management Center MC Agent Elements AEs and Modems Towards the MC the network is based on a X 25 ora LAN connection Between AE and modems this network is established by means of a serial asynchronous bus with differential balanced line transmission according t
89. pen collector alarm output working on a common signaling line The ACU2R gives consolidated alarm signals to the sum alarm relays Urgent and Non urgent The alarm status is also analyzed by the ACU48R via the internal monitor bus to poll each of the possible 24 12 dual LTUs within the subrack and to signal the alarm status to two alarm relays Urgent and Non urgent specific for each LTU Under normal LTU power conditions the two output stages of each LTU are controlled by its microcontroller In case of a power failure on an LTU both the Urgent and Non urgent alarms will be activated on the ACU The ACU generates an auxiliary 5 Vpc which is used to pull up the open collector alarm output stages of the LTUs 6 2 1 1 Alarm Conditions Urgent Alarm e At least one of the LTU LEDs displays a red alarm Power failure of any one of the LTUs Power failure of the auxiliary 5Vpc auxiliary supply on the ACU e Power failure of both 48Vpc supplies Non urgent Alarm e At least one of the LTU LEDs displays an amber alarm and none of the LTU LEDs displays a red alarm e Power failure of any one of the LTUs e Power failure of the auxiliary 5Vpc auxiliary supply on the ACU e Power failure of one of the 48 Vpc supplies Note The EI LTU NTU must be configured as master and the n x 64kbit s NTU as slave when the line rate is lower than 2064kbit s 6 2 2 NTU The two alarm relays Urgent
90. ply is needed for operation In position Loc the NTU modem is powered locally and needs the power supply connected to operate LTU ln the default jumper positions RPWR A ON RPWR B ON the LTU SZ DOC W2E 3 pdf LTU NTU Version 1 2 Operating Manual modem is powering the remote NTU unit In jumper position OFF the remote powering function is disabled Caution LTUs must be disconnected from power during change of jumper setting See chapter Power concept section Remote powering for further information e Connect the modem to the network or PC Plug the appropriate cable to the interface connector on the unit Refer to chapter Connectors Description for cable definitions e Connect the modem to the DSL line If using a preconfigured cable just connect the xDSL line with male RJ45 cable into the female RJ45 connector of the modem If you need to configure the cable refer to chapter 10 Connector Description section DSL Connector e NTUs in remote power mode will start operation immediately with factory default settings and further configuration is optional e Optional Connect the power supply For local power supply of NTUs connect the AD DC power adapter ordered separately to the mains and to the unit The power adapter is optional for NTUs in remote power mode Minirack LTUs can be connected directly to mains to a 48Vpc source or both at the same time Plug in units are powered via the subrack backplane Se
91. r providing a physical isolation barrier of up to 1500 Vins 84 Revision 3 11 2000 LTU NTU SZ DOC W2E 3 pdf Operating Manual Version 1 2 The clock input is converted to TTL levels and is delivered to the LTU This allows for the LTU s El interface to be synchronized to a central master clock if needed The clock input accepts a 2048kHz signal with a peak voltage range from 375mVp p to 3Vp p without disruption to the clock delivery This allows for a connection between a clock source and the clock input having an insertion loss of max 6dB according to ITU T G 703 Sec 10 the minimum clock peak voltage must be not less than 1 5Vp p Below the 375mVp p the Loss of External Clock LOXCK alarm is asserted The LOXCK signal switches on off threshold has a hysteresis of about 25mV 11 2 Power Supply 11 2 1 LTU Local Powering 40 5Vpc 72Vpc Power Consumption remote power off remote power on total local SZ 363 V510 4 4W 14 8W 7 1W SZ 363 V530 2 2 4km REG NTU SZ 363 V511 5 6W 27 5W 8 4W SZ 363 V533 2 2km REG REG 11 2 2 NTU Power Consumption local power remote power Supply voltage 40 5Vpc 72V oc 120Vpo 685V oc at NTU DSL Connector SZ 364 V510 2 9W 2 5 W SZ 364 V530 SZ 364 V580 3W 2 75W 11 2 3 REG Power Consumption local power remote power Supply voltage 120Vpc 65Vpc at DSL Connector SZ 372 V2 n 3 4W 25 C 3 8 W 2590
92. remotely by the master Both the Status Local LED on the slave and the Status Remote LED on the master will be lit amber when a loopback is active e On the master side Loop 1 can only be activated locally Activating Loop 2 turns on Loop 2 at the slave station The Status Local LED will be lit amber when Loop 1 is active Analog Loopback To test the DSL equipment itself the Analog Loopback can be used To perform this test the DSL cable has to be disconnected from the unit which must be configured as master The test can then be activated with the appropriate monitor command see chapter Monitor During the Analog Loopback Test the DSL transceiver receives the signal of its own transmitter due to the impedance mismatch in the DSL line transformer Revision 3 11 2000 87 SZ DOC W2E 3 pdf LTU NTU Version 1 2 Operating Manual All data of the user interface is looped back according to the interface settings No other test loop can be activated during Analog Loopback which in turn can only be deactivated by means of a system reset or power up If activated the Analog Loopback sets off a non urgent alarm Regenerator Loopback When using a regenerator the master can activate an additional loopback in the regenerator Slave Regenerator Master User Interface Loop REG Figure 12 21 Regenerator Loopback During Regenerator Loopback operations DSL frames coming from the LTU are looped back
93. rformance information according to TS 101 135 of a specific loop and is an effective maintenance tool to determine inadequate or bad cable pairs A NM of 0dB in presence of Gaussian noise would yield an expected Bit Error Ratio of 10 5 2 G 826 Performance Monitoring The G 826 error performance parameters provide quantitative performance information of a specific loop They are intended to be used for long term evaluation of operating DSL links The evaluation of the G 826 error performance parameters is based on CRC Cyclic Redundancy Check error detection The estimation of a bit error rate is not within the scope of the G 826 calculations 5 2 1 DSL Interface On the DSL side six CRC6 check bits are generated per DSL frame for each channel and direction For signaling detected block errors in the return direction the FEBE bits are used The DSL G 826 performance of the opposite unit is calculated according to these FEBE bits CRC6 errors are used by the software to count the block errors of the respective DSL channel and to evaluate its error performance according to ITU T G 826 The regenerator also monitors received DSL frames from the LTU REG R side and from the NTU REG C side using CRC6 Detected CRC errors are reported to both stations using the RRBE errors detected at LTU side and RCBE errors detected at NTU side bits These bits are used to calculate the G 826 performance of the regenerator Revision 3 11 2000
94. snnstnnss 85 8 4 2 7 UIF Command scseccsescesccensenncenncnnsenncenusnnaunassnastnnstents 85 8 4 2 8 DEFAULT Command ssssssssssssssssasssasqsanqnasnnasnnstnnts 85 8 4 2 97 COPY GOMMANA sibi seis fess sal an gram or onda asda FORE Nu e FR T AA ERE va 87 8 5 Monitor Commands for LTU Minirack TMN Interface 88 8 541 ADDRESS GOMIMANG sarasa a Na ad aa A eV da d da 88 8 5 2 Vi1WIRES Command sssesssesssesusesusnanqnanqaaennasnnssnnstnnss 90 9 Front and Rear Panel Description ssssssnnannnnnsssssnnonnnnnannserennnnnnnnnnnnnnts 93 9 1 Tabletop NTU Rear Panel cccccccccccssssceceesseeeeeseseeeeesseseeeesuseeeeeseeeeeesaaaeeess 94 9 2 Minirack NTU Front Panel sssssssssssssssssssasteusqsasssutnnssnnss 94 9 3 Plug in LTU Front Panel ia sasa cadi askia Ee aan 96 9 4 Minirack LTU Front Panel sss arma E tea VN nested seneo 99 10 Connectors Description nn en ne aana UN awa GE Na Gaga gha Ti Gaga angaken Ga anan NENG 101 TOAL DSE GONMOCION een a a as Gb aa et ever taco k l daa ea deba EE 102 19 2 ElACOnMECIOR so omis AKE A dus sted Nado 103 10 2 T Impedance 1200 nr aa EN eee 103 10 2 2 Impedance 750 cea dc eit Hana 105 10 3 n x 64kbit s Connector s s scsssss
95. sseassssonoo 26 4 4 2 5 Clock Directimedia nnne 28 4 4 2 6 V 54 Loops and Loop Control ssaas eee ee eaaa aana anana aane anan anane 28 4 4 2 6 1 Normal Handshake Operation sse 28 4 4 2 6 2 Supported V 54 Loops ooooocccccccccccnononcconnnnnnnonnnnnnnnnnnnnnnnnnnnannannn 29 4 4 2 6 3 Automatic Loop Control through the DTE DCE Interface 29 4 4 2 7 Byte Timing sssesssssessseseseseesneenenennnnnne nennen nennen trn nennen 29 4 5 TMN Interface Minirack LTU only asane eaaa aane nana a aane ena anana eem 30 4 5 1 TIA EIA 485 4 wire Bus sasarane anana anana anana aaa nana a nennen 30 4 5 2 TIA EIA 485 2 wire Bus eaaa aana aana a anana aaa nana aana eaaa nana 31 4 5 3 TIA EIA 485 Bus Termination sesa saeee eaaa eaaa nana anana eaaa anana 33 5 Performance Monitoring sadis adedana ga inaran aana uga gawaa aa Dee Een ann Eo eir pde da aaa 35 5 1 INOIS MArgIN sasa fen pae aa Done d obs NA AR ke dwa Ga an dan ea aan abode dee a a Sa Fo de des Den saa see 35 5 2 G 826 Performance Monitoring aaaaaa eaaa nana aane nana nnnnnnnnnnnn nenn nnnnnnnnnnnnnnn 35 5 2 DSE Anlerface 2 u eR ke an iye s 36 52 2 BA Interface rs aaa gan b an ah Sedes scheinen 37 5 2 3 ISDN PRAJNGHaG a a sarah eaaa an gan UGI Na a eaaa A Na aga a 38 6 Alarms 39 6 1 LEEDS
96. ssssssssasssussuenuaneqnaeqnasnnstnnss 105 Revision 3 11 2000 vii SZ DOC W2E 3 pdf Version 1 2 10 3 1 User Interface Type eesee ee anane anana 10 3 2 nx 64kbit s Cables anana ena anana 10 3 2 1 V 35 DTE Gable s m deeem apa geroj 10 3 2 2 V 35 DCE Cable ooooccccccccccconocccccncncnnononnancnnnancnnnnnns 10 3 2 3 V 36 DTE Cable akasane dara d aa NATE aa a aa kia 10 3 2 4 V 36 DCE Cable oo iang gana rana an pan ban inise 10 3 2 5 X21 DTE Gabler rl 10 3 2 6 X 21 DCE Cable ssesseseeeen 10 4 Monitor Connector NTU eeeeeeeeem e 10 5 Monitor Connector LTU in Minirack 10 6 48Vpc Power Connector NTU ssseeeeese 10 7 48Vpc Supply Minirack aaaaaa eaaa anaa anane anana anane nana anaa 10 7 1 Mains Connector Minirack LTU only 10 7 2 2048kHz Input Minirack LTU only 10 7 3 TMN Alarms Minirack LTU only 11 Technical Specifications 1111 2nensessssnnnnnnannnnnnennnnnn 11 1 US ACOSO ea eR decet s 11 1 1 DSL Line Interface eenen 11 1 2 User Interface ooooccicinncccoconncnccnnnncnnnnnnnancnnnancncnnnns 11 1 3 Monitor Interface ereere renerne 11 1 4 TMN and Alarm Interface Minirack LTU Only 11 1 5 The 230 115Vms and 48V pc Supply of the Minira
97. sssssssssssssesneeemenenenen nennen ennt nena 7 3 3 Installation Reguirementis eaaa eaaa aee nana aa aana anana nana nennen enne nena 9 4 interface Configuration Options sssssssssnnannnensstsnnrnnannnsesenrnnnnnnannnsnrennnnns 11 4 1 Dis ENE 11 4 1 1 Master Slave sai nass UO ELIR LUJ 11 4 1 2 HDSL Operating MOWES ooccccccccccnnonccnccnconconcnonnnnconcancnncnnnnanancnancnncnnns 12 451737 Autorestar n ae se a a lanu dlas ola on dla 13 4 1 4 Time Slot Mapping sse aaa anana aa a aaaaanttanosoososeeessosotosooooosne 13 4 2 El Interface 2 Mbit s 6 703 G 704 uunssensennssenennnnnennnnnnnnnennnnnnn nn aana aana aee 14 A251 Eram ss km kae Ped ase lan BENE eatin each Pel ree rad ven el 14 4 2 1 1 Transparent Mode aaasar patate atan aaa as anana anaa anna aana aan anaa anae 14 4 2 1 2 Framed Mode ITU TG 704 aaa ae eaaa aana aana aana nana aana nean 14 4 2 1 2 1 CRGA in eke eee E e rm e NEK a O OO 14 4 2 1 2 2 E bit InSertioris eco er ske re eH leenkarn apk ree prive 15 4 2 2 AC E A site d den rh a adus rfe de 15 4 2 3 AS Detection ie eee Eee nase keines 15 4 2 4 E1 Clock MOYESs isaabudaya sabawana an adandan kg aaa pe nennen nnne daa an baa ng aa nnns 15 42 41 Glock Sources Em 15 4 2 4 2 External Clock Mode us4004nsnnnnnneennennnen nennen nnennnen nennen 17
98. system clock The Ethernet NTU will provide the clock when it is configured as master Then the n x 64kbit s clock mode has to be remote When the Ethernet NTU is slave and the n x 64kbit s NTU LTU master the clock must be determined by the n x 64kbit s equipment i e its clock mode must be internal or local port It is recommended to have at least one clock reference So one should not use remote clock mode at both ends You should not choose remote clock mode either if the remote modem is El and the El equipment connected to the remote El port uses loop timing i e it uses the received clock as transmit clock 4 4 2 5 Clock Direction In most cases the clock direction depends on the clock mode and cannot be configured An exception is El port clock mode In this case codirectional or contradirectional clock direction can be configured However in almost all cases a contradirectional clock should be used A codirectional clock can only be used if it has the same reference as the El transmit signal i e its rate is nominally equal to n 32 of the El rate Revision 3 11 2000 21 SZ DOC W2E 3 pdf LTU NTU Version 1 2 Operating Manual A clock direction configuration is also possible for last generation NTUs which are equipped with two n x 64kbit s interfaces working in local port 1 or 2 clock mode Then it can be selected whether the other port uses also a codirectional clock both codirectional clocks must have the same reference 4
99. transparent AIS generation on and AIS detection off the slave is PRA NTI amp LT CRC4 processing on e The master is PRA LT with CRC4 monitoring on the slave is PRA NTI with CRC4 processing on 4 3 2 3 Digital Link with CRC Processing in the LT and NT1 Option 3 In this mode the NTI behaves like in option 2 The LT is not transparent but has CRC4 generation and monitoring in both directions This option is not possible when using combined NT1 amp LT mode the setup for option 3 is e The master is PRA LT with CRC4 processing on the slave is PRA NTI with CRC4 processing on HR L Local CRC error information H Remote CRC error information Mandatory M CRC Monitor Optional G CRC Generator Figure 4 7 Digital Link with CRC Processing in the LT and NT1 4 3 2 4 Digital Link with CRC Monitoring in the NT1 Option 4 CRCA multiframe alignment and checksum words are not regenerated in both directions i e data will be transmitted without changes in both directions However blocks with CRC4 errors received from the NT2 TE and the ET will be detected and monitored by the G 826 performance management functions of the NTU monitor When loss of signal or loss of frame alignment is detected at either side AIS is transmitted at the opposite side Revision 3 11 2000 17 SZ DOC W2E 3 pdf LTU NTU Version 1 2 Operating Manual The detection of events and the state information ar
100. units will not be accessible by the TMN application SW Both DSL systems of a Dual LTU can be addressed freely But possible addresses are limited to the address ranges 01 12 and 33 44 by the Small Network Management Protocol SNMP used for communication with the Management Centre 8 5 2 V11WIRES Command Note Note 64 The V11 WIRES command allows to switch between 2 or 4 wire communication on the TMN interface EIA 485 bus LIU 03 CM V11WIRES 2 23 34 90 V 11 wires set to 02 ocal Configuration Id nx64 kbit s V 35 Va 35 Bitrate Port 1 32 x 64 02048 kbit s HDSL Line Rate 02064 kbit s Master Slave Master Autorestart Enabled Remote Powering On TMN Address s 03 V ll wires no LOZ LTU 03 CM 4 wire communication is recommended for Minirack configurations 4 wire communication requires a crossing of Rx and TX signals between CMU and LTU 2 wire communication uses only Rx A and Rx B wires without any crossing Revision 3 11 2000 LTU NTU SZ DOC W2E 3 pdf Operating Manual Version 1 2 9 Frontand Rear Panel Description Revision 3 11 2000 65 SZ DOC W2E 3 pdf LTU NTU Version 1 2 Operating Manual 9 1 Tabletop NTU Rear Panel El 1200 AC DC Adapter Monitor Alarm El 120 Ohm nx 4kolt s erste UG EN A sg ni a er EN Rem Loc
101. y impair operation 2 2 Ordering Information 2 2 1 LTU Model Description Product Number Plug in W2 LTU L R E1 1200 SZ 363 V510x W2 LTU L R E1 750 SZ 363 V530x W2 Dual LTU L R 2xE1 1200 SZ 363 V511x W2 Dual LTU L R 2xE1 750 SZ 363 V533x Minirack W2 Dual LTU L R 2xE1 1200 SZ 798 V511x W2 Dual LTU L R 2xE1 750 SZ 798 V533x 4 Revision 3 11 2000 LTU NTU SZ DOC W2E 3 pdf Operating Manual Version 1 2 2 2 2 NTU Model Description Product Number Table top W2 NTU L R E1 1200 SZ 364 V510x W2 NTU L R E1 750 SZ 364 V530x W2 NTU L R nx64 SZ 364 V580x Minirack W2 NTU L R 2xE1 1200 SZ 795 V510x W2 NTU L R 2xE1 750 SZ 795 V530x W2 NTU L R nx64 SZ 795 V580x Notes x W as a default for the general version x other letter than W standing for customer specific version 2 2 3 REG Description Product Number W2 regenerator unit SZ 372 V2x W2 regenerator case open air ground installation for 4 REG SZ 372 V3x W2 regenerator outdoor case IP66 for 1 REG SZ 371 V2x W2 regenerator outdoor case IP55 for 2 REG SZ 371 V3x 2 2 4 Accessories Subrack SZ 379 V3W ACU2R SZ 369 V5W ACU48R SZ 369 V4F Nx64kbit s Cables V 35 DTE 3m length V 35 DCE 3m length V 36 DTE 3m length V 36 DCE 3m length X 21 DTE 3m length X 21 DCE 3m length AC DC Adapter 230V version SZ 378 0A0 V1 AC DC Adapter 115V version SZ 378 0A0 V3 DC DC Adapter 48 60V SZ 378 0A0 V5 SZ

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