Flexible multiplexer E1XL
Contents
1. Drop Insert multiplexer In this mode a separate E1 link for independent data drop and insert can be assigned to each digital port RS 530 RS Digital 232 V 35 21 Ethernet interface E1 link max 1 5 km interface 0 interface 1 E1 link max 1 5 km To RS 232 Digital RS 232 terminal interface V 35 X 21 Ethernet a por a por 1 IDSL E1 XL in Drop Insert multiplexer mode The following is an example of E1XL device application in Drop Insert mode The figure below depicts three geographically distributed LANs interconnected using some timeslots of E1 link passing through LAN sites Timeslots that are not engaged in transmission of data between LANs are used to connect two PBXs Ethernet Hub Ethernet Hub Ethernet Hub 10BaseT E1 link E1 link E1lnk E1xXL E1 link2. Package contents The delivery package includes the following EI XL multiplexer in the ordered configuration Removable terminal blocks for connection to El lines 2 ea Power cord for AC power models User Manual Operation modes Two independent devices mode Ordering code Model Design B stand alone R 19 rack mount E1 XL R ETH V35 AC A t Power supply for stand alone version AC 220V DC 60V Digital interface of link 1 530 RS 530 232 RS 232 V 35 V 35 X21 X 21 ETH Ethernet DSL IDSL modem M multi standard Digital interface of link 0 530 RS 530 232 RS 232 V 35 V 35 ETH Ethernet X21 X 21 DSL IDSL modem M multi standard For stand alone version only Two data links are fully independent in this mode Data entering the digital port input is assigned to selected timeslots of a corresponding E1 link Unused timeslots are filled with ones Data from selected time
3. Specifications Digital interface Data 64 to 1 984 kbps Nx64 or to 2 048 kbps in the unframed mode Timing sua TXC RXC ETC ERC Modern signals a Pet ei diet DTR DSR CTS RTS CD E1 interface Line COLINE ceu pa ieu Dv vint Eee HDB3 Line Impedanoe essc erba eb sb tati aasan 120 Ohm balanced twisted pair or 75 Ohm unbalanced coaxial set with jumpers Signal level at receiver input 0 to 36 dB max 1 5 km distance via 0 6 mm twisted pairs Transmit path synchronization from the internal clock generator or from E1 0 link receive path or from 1 1 link receive path or from digital port 0 or from digital port 1 Phase jitter attenuation In receive or transmit paths attenuation up to 120UIpp Frame irc According to G 704 SD URBE o RR TOO CRC4 CAS G 704 Frequencies offset adjustment
4. RXC RXD TXD 12 t1 TXC TXC DCE output Tirinnnr TXC at DTE input Jinn TXD at DTE output TXD at DCE input dq Data is changed using the rising edge and it is read using the falling one The figure depicts an occurrence of the error when data is read in DCE at the very moment it is being changed It leads to an erroneous reception of data from the router The probability of such a situation grows as the data rate increases The problem can be solved by inverting TXC clocks To implement this you should change the corresponding setting for one of the devices Sometimes there is a need in connection of two DCE devices via V 35 RS 232 RS 530 etc interface The simplest way to realize such a connection is to use the mode of external synchronization of transmit paths in both devices EXT A B EXT EXT Tc D Txc R ETC LINE LINE EC M Connection of two DCE devices via the digital interface Cl
5. Timeslots 1 Mux mode translate TS16 Three to one multiplexer mode Timeslot 16 is transparently translated between E1 links Mode Mux Smart Link 0 TP Sync Link 1 High gain Usel6 no CRC4 Mon Sa4 Link 1 TP Sync Link 0 High gain Usel6 no CRC4 Mon Sa4 Port 0 960 kbps DropO InsertO0 CTS 1 Port 1 960 kbps Drop0O Insert0O CTS 1 135 5 7 93b 3 5 7 9 1l Timeslots 0 Timeslots 1 HE HEH ERE Drop Insert Drop Insert multiplexer mode Data from port 0 is transmitted to E1 1 link and received from E1 0 link Data from port 1 is transmitted to E1 0 link and received from E1 1 link Timeslot 16 is transparently translated between links Mode Mux Smart Link 0 TP Sync Link 1 High gain Usel6 no CRC4 Mon Sa4 Link 1 TP Sync Link 0 High gain Usel6 no CRC4 Mon Sa4 Port 0 64 kbps DropO0 Insertl CTS 1 Port 1 64 kbps Dropl Insert0 CTS 1 l 2 5 T 9 l1 3 5 7 913 5 9 imeslots O0 imeslots 1 1 TD rry 2 TD 1 8 3 RD H 4 Not used Ethernet i
6. Parameter Values when configuring Values when configuring using DIP switches using a console General parameters Multiplexer mode Dual MUX Drop Insert Dual MUX Drop Insert E1 link parameters E1 link mode Framed Framed Unframed Transmit path timing source INT Link O Link 1 Port 0 Port1 INT Link 0 Link1 Port 0 Port 1 Initial timeslot 1 31 1 31 Number of 1 31 1 31 timeslots in series in random order CRC4 multiframe Disabled Enabled Disabled alignment Timeslot 16 Data transmission Data transmission assignment CAS multiframe alignment Location of TSO bit Sa4 Any bit of any monitoring channel timeslot at your choice in E1 frame Loss of sync Remote Alarm Remote Alarm action AIS Sensitivity 36 dB 36 dB 12 dB Digital port parameters Selection of data insert E1 0 E1 1 E1 0 E1 1 link Selection of data drop E1 0 E1 1 E1 0 E1A link Receive path RxC RxC ERC synchronization mode HDLC buffer Off Off On CTS generation CTS 1 CTS 1 CTS CD CTS RTS mode CTS CD RTS RXC ERC clock Normal Normal Inverted pulses TxC clock pulses Normal Normal Inverted Unfra
7. Statistics Session 2 0 days 23 47 17 Mode Smart Mux Link 0 TP Sync Link 0 High gain Usel6 no CRC4 Mon Sa4 Link 1 TP Sync Port 0 High gain Usel6 no CRC4 Mon Sa4 Port 0 960 kbps Drop0 Tnsert0 CTS 1 Cable direct RS 530 DTR RTS ETC ERC DSR CTS CD TXC RXC Port 1 960 kbps Drop0 Tnsert0 CTS 1 Cable direct V 35 DTR RTS ETC no ERC DSR CTS CD TXC RXC J 35 7 9135 79 1 timeslots e 1 timeslots f t from Status Ok Ok Ok Ok Ok C key is used to reset all the error registers of the local device R key allows to change the screen refresh mode Counter Error description BPV Bipolar violation OOS Out of frame seconds Err For E1 links number of seconds during which BER tester errors or line code errors occurred during normal operation in the unframed mode For Ethernet ports overruns of Ethernet bridge internal buffers Event Seconds of events related to the link Event meanings depend on the interface type Event counter meanings Interface type Event
8. MUX A MUX B INT From Link i TXC DTEA TXC DTEB RXC m RXC Single timing from multiplexer A MUX A MUX B From Port From Link DTEA TXC UN TXC DTE RXC RXC CLK Wi ETC Single timing from DTE A Separate timing sources Receive and transmit lines of E1 path are fully independent and can have separate timing sources Below is an example of such a mode DTEA CLK MUXA From Port TXC RXC ETC MUX B INT al xd DTEB RXC Separate timing from DTE and multiplexer Copyright 2001 Cronyx Engineering Ltd 18 FLEXIBLE MULTIPLEXER E1 XL aa
9. Timeslots menu is used to define timeslots assigned for data transmission T 2o 9 91 3 5 Y 9 1 3 5 7 9 I Timeslots Select timeslots to be used for transmission of data from the digital COM port using arrow keys to move the cursor along the timeslots line and space key to change timeslot assignments Symbol shows that the given timeslot is used for transmission of the digital port data E1 1 link parameters are similarly set using Link 1 menu Smart Mux TP Sync Link 0 High gain Usel6 no CRC4 Mon Sa4 TP Sync Link 0 High gain Usel6 no CRC4 Mon Sa4 115200 baud 8n1 DropO Insert0 CTS 1 Cable not attached DSR CTS no CD 960 kbps Drop0 Tnsert0 CTS 1 Cable not attached DSR CTS no CD TXC RXC E S uoce 3 ue a5 Top timeslots Link O to times dTgggdddddd dd 444 from Link 0 to Timeslots Drop from Link 0 Insert to Link O Mode Async Baud rate 115200 Char format 8nl CTS Digital COM port 0 parameters are configured using Port 0 menu Smart Mux TP Sync Link 0 High gain Usel6 no CRC4 Mon Sa4 TP Sync Link 0 High gain Usel6 no CRC4 Mon Sa4 960 kbps Drop0 Tnsert0 CTS 1 Cable not attached DSR CTS
10. 52 53 51 K LL L LL KL LL LLL CLL LLLLLL DD E1 1 Start 1 1 E1 0 E1 1 Drop Drop Consple 1 0 Start E1 0 S 0 1 Number yne Syne insert Insert Dual Number 0 1 MUX E1 0 Start E1 0 link initial timeslot E1 1 Start E1 1 link initial timeslot E1 0 Number number of E1 0 link timeslots E1 1 Number number of E1 1 link timeslots E1 0 Sync timing source of E1 0 transmit path E1 1 Sync timing source of E1 1 transmit path HH internal clock generator the receiver RB from the receiver of the other link BB the digital interface Drop 0 E1 link option for dropping data to the digital port 0 Drop 1 link option for dropping data to the digital port 1 H E1 0 B E1 1 Insert 0 1 link option for the insertion of data from the digital port 0 Insert 1 1 link option for the insertion of data from the digital port 1 H E1 0 B E1 1 Console Permissions on setting configuration parameters using a console H Only DIP switches are used remote control is disabled NVRAM is not used A A remote terminal is used parameters are stored in NVRAM DIP switches are not used Dual MUX Selection of E1 XL flexible multiplexer operation mode H two independent links
11. Configuration parameters At every turning on of the multiplexer it is being configured according to the defined parameters There are two sources of setting configuration parameters DIP switches on the bottom cover of the device NVRAM storing parameters set from a console Saving settings 53 9 microswitch enables the remote control of the multiplexer i e configuring its parameters from a terminal connected to the console port In the remote control mode configuration parameters of the device are stored in its non volatile memory NVRAM When the remote control is disabled NVRAM is not used and all parameters can be set using DIP switches only 53 9 Setting parameters Only DIP switches used remote control is disabled NVRAM is not used B A remote terminal is used parameters are stored in DIP switches are not used Selection of operation mode 53 10 microswitch position determines E1XL link configuration 53 10 Configuration two independent links A multiplexer Selection of data insert link In multiplexer mode S3 6 and 53 8 microswitches determine 1 links for digital ports 0 and 1 respectively where to transmit data 53 6 insert link for port 0 Insert0 S3 8 insert link for port 1 Insert1 H E1 0 B 1 1 Co
12. MUX A MUX B From Port From Port DTE A l RXC RXC CLK CLK TUL ETC ETC Separate timing from CLK CLK DTEA l x nn DTEB RXC RXC ETC Separate timing from multiplexers A and B Synchronization in multiplexer mode In multiplexer mode you should use receive paths of E1 links as timing sources for transmit paths of the opposite E1 links Otherwise there will occur recurrent overruns underruns of controlled slip buffers at retranslating timeslots between E1 links due to different clock frequencies that in turn will cause a retransmission loss of data frames DTE emulation There are two clock pulse inputs ERC and ETC provided for connection of E1 XL multiplexer to DCE via RS 232 V 35 or RS 530 digital interface in a synchronous mode X 21 interface has ETC input only provided for DTE1 emulation mode DTE1 emulation mode is used when connecting to DCE devices with a digital port RS 232 V 35 RS 530 X 21 as an external timing source In this case a pair of devices interconnected via a digital port RS 232 V 35 RS 530 X 21 transparently translates the clock frequency
13. Statistics Session 21 0 days 00 00 29 Mode Smart Dual Lin TP Sync Int High gain Use16 no CRC4 Mon Sa4 Lin TP Syno Tnt High gain Use16 no CRC4 Mon Sa4 Por 1984 kbps Half duplex TXC RXC Port 1 1984 kbps Half duplex TXC RXC 1 3 5 7913 5 791357 91 0 timeslots EEE H HHH 1 timeslots EEE H HHH BPV K H Cx CO CCo oc CX sl S Smart Dual TP Syno Tnt High gain Use16 no CRC4 Mon Sa4 TP Sync Int High gain Usel6 no CRC4 Mon Sa4 1984 kbps Half duplex Link error TXC RXC 1984 kbps Half duplex Link error TXC RXC I ipu Mdb 35 7 9 0 7305 a 0 timeslots THEE HE ERE from timeslots from Timeslots Duplex Half Filtering Enabled Configuration parameters related to Ethernet interface can only be changed from a terminal connected to the console port Upgrade of on board firmware On board firmware of the stand alone multiplexer version can be overwrited using a PC and a special software via the
14. notused timeslots 0 kbps tmeslot 1 1timeslot 64 kbps timeslot2 2timeslots 128 kbps RHBHBB timeslot 3 timeslots 192 kbps RHBBHH timeslot 4 HB 4 timeslots 256 kbps RHBBHB timeslot 5 HEHEHE 5timeslots 320 kbps gt timeslot 6 timeslots 384 kbps timeslot 7 7 timeslots 448 kbps HOHHH tmeslot8 8timeslots 512 kbps RBHHB timeslot9 RBHHB 9 timeslots 576 kbps HAHAH tmeslot 10 10 timeslots 640 kbps RBHBB timeslot 11 GABAA 11 timeslots 704 kbps gt timeslot 12 RBBHH 12 timeslots 768 kbps RBBHB timeslot 13 GABAA 13 timeslots 832 kbps HABA _ timeslot 14 14 timeslots 896 kbps RBBBB timeslot 15 15 timeslots 960 kbps BBHHHH tmeslot16 BBHHH 16timeslots 1024 kbps BBHHHB timeslot 17 BBHHB 17 timeslots 1088 kbps BBHHBRH _ timeslot 18 18 timeslots 1152 kbps BBHHBB 6 timeslot 19 19 timeslots 1216 kbps gt timeslot 20 20 timeslots 1280 kbps BBBHB timeslot 21 BHBBRHB 21 timeslots 1344 kbps BHBB timeslot 22 22 timeslots 1408 kbps BHBBEB timeslot 23 BHBBRB 23 timeslots 1472 kbps BBHHH gt timeslot 24 24 timeslots 1536 kbps BBHHB timeslot 25 BBHHB 25timeslots 1600 kbps
15. abi RE REAA ERA A REAR 9 Front panel indicators u 9 Nit uuu 9 MU rg umb Iq C P 9 Programming Mode m 10 DIP SWILICheS uu X 10 COnSO 10 Configuration parameters 11 AP 11 Selection of operation mode 11 Selection of data insert link a 11 Selection of quia drop link a a a uqa Ea b ER ERA drs iare 11 Transmit path synchronization ee 11 EI link T 11 Timeslot 16 Ium Mm 13 CRA m ltiframe a S 13 Location of the monitoring channel in E1 frame 13 Initial ANOS OL Sm s 13 Number of timeslots 13 Data rate in the
16. controlled slip buffers in receive paths eee unn uyu u ETE removable terminal block Alarm interface Relay contacts current max 250 mA Relay contacts voltage max 175V DC aucem n Mini DIN 6 pins Control port Intertace type au susu RS 232 Data transfer protocol asynchronous 9600 kbps 8N1 Ka DB9 female Diagnostics modes A UE digital via digital interface or local via G 703 line at a local device or Copyright 2001 Cronyx Engineering Ltd FLEXIBLE MULTIPLEXER E1 XL a a i a aa a SS CU EMO a A E Sa a ae aa ZZ Z Z7 7 7 7777 777 777 7777777777 7 7777777777777777777777 77777777777 7777777777777777777777777777777777777777777777777777777777777777777777777777777 remote via G 703 line at a remote device activated using front panel switches or via control port Bit error TALS sss a activated using front panel switches or via control port Description Cronyx E1 XL is a multipurpose device intended for connection to E1 PCM30 links Serving as an interface and rate converter the device receives data from a digital interface 64 to 2 048 kbps and allocates it in E1 flow thereby using the necessary number of timeslots or the whole 2 048 kbps bandwidth i
17. 32 Considerations on building synchronous links 33 Connector pin assignments 37 V 35 cable for connecting to DCE with external transmit clocks 37 V 35 cable for connecting to DCE with external transmit clocks for a multi standard interface 37 V 35 cable for connecting to DCE with external receive and transmit ll iq 37 V 35 cable for connecting to DCE with external receive and transmit clocks for a multi standard interface 38 V 35 cable for a multi standard interface 38 RS 232 cable for a multi standard interface 38 RS 530 cable for a multi standard interface 38 RS 449 cable for a multi standard interface 39 Cable for connecting two devices with a multi standard interface 39 X 21 cable for a multi standard interface 39 Copyright 2001 Cronyx Engineering Ltd FLEXIBLE MULTIPLEXER E1 XL ae
18. FLEXIBLE MULTIPLEXER E1 XL aa Contents FO ACUI CS 3 1 Mtis I M 4 GSGEIDNIO uuu la crgo C2 6 Operation modes 6 Two independent devices mode 6 MG 6 MultIb eXx r TO e Dnm 7 Three to one multiplexer mode 7 Drop Insert multiplexer 8 Controls and indicators 9 Front panel CODIFOIS u
19. use DB25 female connectors HDB44 female connectors PinDB25 X RS 530 signal Direction V35 RS 530 signal X21 2 TXD a TXD Input 10 TXD a TXD a TXD Transmit A 14 TXD b Input 25 TXD b TXD b Transmit B 3 RXD a RXD Output 8 RXD a RXD a RXD Receive A 16 RXD b Output 9 RXD b RXD b Receive B 24 ETC a ETC Input 6 ETC a ETC a ETC ETC A 11 ETC b Input 7 ETC b ETC b ETC B 15 TXC a TXC Output 2 TXC a TXC a SigTiming A 12 TXC b Output 3 TXC b TXC b Sig Timing B 17 RXC a Output 5 RXC a RXC a RXC 9 RXC b Output 4 RXC b RXC b 21 ERC a ERC Input 17 ERC a ERC a ERC 18 ERC b Input 18 ERC b ERC b 4 RTS a RTS Input 14 RTS RTS a RTS Control A 19 RTS b Input 29 RTS b Control B 20 DTR a DTR Input 11 DTR DTR a DTR 23 DTR b Input 26 DTR b 6 DSR a DSR Output 13 DSR DSR a DSR 22 DSR b Output 28 DSR b 5 CTS a mode Output 15 mode CTS a mode 13 CTS b Output 30 CTS b 8 CD a CD Output 12 CD CD a CD Indication A 10 CD b Output 27 CD b Indication B 1 7 GND GND 1 16 GND GND GND GND 31 SEL 0 SEL 0 SEL 0 SEL 0 33 SEL 1 SEL 1 SEL 1 SEL 1 35 SEL 2 SEL 2 SEL 2 SEL 2 Digital ports with X 21 interface use DB15 female connectors DB 15 female RS 232 Direction 37 SEL 3 SEL 3 SEL 3 SEL 3 2 T A In
20. 16 Receive nur sin MM 16 Synchronization modes 16 Single timing SOUFCGB SBRReMalasggss 16 Separate tftiming SOUFCBS iioi ea pex dpuwuc dada AMIRU TOU 17 Synchronization in multiplexer mode 18 DTE m lati h seca ese aes 18 DIE l emulation R R 18 2 MOG s isiscsisiesevscescssesssisoseecescsssessssesvascccssevecedevececesssdecsenseedeccesdsccsadsessccesesiseonuasseeis 19 Timing source specifications 20 2 21 IBterfaC6 b c n 20 REED E TD DE D o 20 E 20 Local JOO DD ACR EE 21 Remote loopback c 21 Digital loopback em X 21 Alarm ravi Qa adi cac a 22 Back panel connectors 22 Management using a console 24 Ethernet interface 30 Upgrade of on board firmware 31 Synchronous data transmission
21. Copyright 2001 Cronyx Engineering Ltd FLEXIBLE MULTIPLEXER E1 XL Se ee ee oc ope cp MUX A DCE TXD BENE RXC ETC TXD RXD ETC RXC TXC From Port MUX B DTE DTE1 emulation mode with external transmit clocks DTE2 emulation mode DTE2 emulation mode is used when connecting to DCE devices which do not support an external synchronization from a digital port RS 232 V 35 RS 530 In this case E1 XL multiplexer receives data at the digital port using clocks received at ETC input and transmits data using clocks received at ERC input The phase equalization of data at the output of RXD digital port for ERC clocks is executed using FIFO buffer To ensure the correct buffer operation with no overruns underruns the frequency of clocks received from the line should equal to the frequency at ERC input This condition is met when the data link has a single timing source Otherwise recurrent errors will occur due to overruns or underruns of FIFO buffer The rate of such errors depends
22. Flag Link state Ok Normal operation both frame and multiframe alignments are present LOS Loss of signal Als Alarm indication signal received blue code LOF Loss of frame alignment LOMF Loss of multiframe alignment FARLOF Loss of frame alignment at a remote modem AIS16 Alarm indication signal received in timeslot 16 FARLOMF Loss of multiframe alignment at a remote modem CRCE Checksum error RCRCE Checksum error at a remote modem Loopback menu is used to control local digital and remote loopbacks Loopback Mode Smart Link 0 TP Sync Link 0 High gain Usel6 no CRC4 Mon Sa4 Link 1 TP Sync Port 0 High gain Usel6 no CRC4 Mon Sa4 Port 0 960 kbps Drop0 Tnsert0 CTS 1 Cable direct RS 530 DTR RTS ETC ERC DSR CTS CD TXC RXC Port 1 960 kbps DropO Insert0 CTS 1 Cable direct V 35 DTR RTS ETC DSR GTS TXGC 913 5 T 9 1 3 5791 0 timeslots Link 0 to 1 timeslots from Link 0 to sink loop sink loop i led Port loop i led Port loop di led Link remote loop disabl Link remote loop disabl Test menu allows to enable disable a built in bit error rate tester Link 0 test stopped Link 1 test stopped The use of a console to control the BER tester and loopbacks is allowed only if front panel switches are in neutral positions Loopback and BER te
23. cts f cd rts cts f cd rts gt CTS Local loopback on Remote loopback request is enabled DTEB MUX A oN DSR K CTS lt cts f cd rts Digital loopback MUX B Carrier OK ON p DSR RTS cts f cd rts gt CTS Normal Copyright 2001 Cronyx Engineering Ltd operation SE ee OE ey ZZ Z 77 7 7 77 77777 7777 7777777777 7777777777777777777777777777777777 777777777777777777 7777777777777777777777777777777777777777777777777777777777777 FLEXIBLE MULTIPLEXER E1 XL aa Alarm interface Alarm interface is used to activate an external alarm device g a bell buzzer panel indicator etc when a failure
24. B multiplexer 3AO 123060 7 095 742 1771 4 Web www cronyx ru Cronyx Engineering 123060 Moscow Russia FTP ftp cronyx ru Marshala Sokolovskogo St 4 E mail info cronyx ru
25. RS 530 RS 232 etc interfaces have special clock lines allotted for each data direction receive and transmit RXD data is accompanied by RXC clocks while TXD data is accompanied by TXC clocks Modem line interfaces G 703 xDSL etc use self synchronizing codes HDB3 Manchester 2B1Q etc allowing to transmit both data and clocks over the same wires Self synchronizing codes are noted for they do not contain long sequences of the same level It allows to use a PLL to derive clocks and data from the signals received at the receiver side There can be two types of V 35 RS 530 and RS 232 interfaces DCE and DTE Modems have DCE interfaces whereas PC like devices have DTE interfaces DCE devices are timing sources for both directions of data transmission Both RXC receive clock and TXC transmit clock signals are output ones for them Here RXC is a signal received by a modem from a line and derived by a PLL It accompanies RXD data received by the modem and has the same direction TIMING SOURCE INT TRENT RCV TC EIS ETC Y P lt p RD Le DCE Data entered the modem TXD is accompanied by TXC signals The source of TXD data signal is a DTE device TXC clocks are received from the modem and can have one ofthe following three timing sources an internal modem generator INT a clock derived by the PLL from th
26. Timeslots used LAN data transmission i Timeslots used in communications between PBXs An example of E1XL application in Drop Insert multiplexer mode Geng E PWR RTS RERR LERR TST BERT NIE CONTROL RS 232 LOC on DIG or Q O REM Front panel controls Copyright 2001 Cronyx Engineering Ltd FLEXIBLE MULTIPLEXER E1 XL Peas Controls and indicators Front panel controls BERT three position switch activating bit error rate tester BERT Bit error rate tester LO On E1 0 line testing OFF Off normal operation L1 On E1 1 line testing LOOP two three position switches LOOP 1 and LOOP2 allowing to select a loopback type and a link number LOOP1 Loopback LOC E1 local loopback DIG Digital interface loopback REM E1 remote loopback LOOP2 Point of loopback activation LO Link 0 0 Loopback disabled L1 Link 1 The f
27. P ETC a 6 24 TXD b 25 a amp ETC b 7 lt 11 RXD a 8 2 15 RXD b 9 TXC b 3 12 ETC a 6 U RXC a 5 17 7 W RXC b 4 gt 9 2 Y ERC a 17 lt 21 TXC b 3 xA ERC b 18 lt 18 RXC a 5 RTS a 14 lt 4 BXC b 4 X RTS b 29 lt 19 ERC a 17 s BB DTR a 11 lt 20 ERC b 18 gt 7 DTR b 26 23 RTS 14 lt DSR a 13 6 DIR T gt H DSR b 28 22 CTS a 15 5 Copyright 2001 Engineering Ltd e FLEXIBLE MULTIPLEXER E1 XL YX SS ee a ee EE E EE ee ey ZZ Z Z7 7 77 777 7 777777777777777777777777777777777777777777777777777777777777777777777 77777777777777777777777777777777777777777777777777777777777777 CTS b 30 y 13 ETC a 6 5 RXC a CD a 12 8 ETC b 7 4 RXC b CD b 27 10 RXC a 5 6 ETC a GND 1 lt 1 RXC b 4 NIA 7 ETC b GND 16 lt gt 7 RTS 14 lt 12 CD SEL x 31 33 37 connect to GND 1 DIR 11 lt 13 Dak r n DSR 13 gt p 11 DTR 12 y 14 RTS RS 449 cable for a multi standard X SH interface TXC b 3 Not connected HDB44 Direction DB37 ERC a 17 Not connected male female ERC b 18 Not connected TXD a 10 4 GND 1 lt gt 1 GND TXD b 25 4 22 GND 16 gt 16 G
28. console port Firmware updates are available at Cronyx web site www cronyx ru The software package includes detailed instructions describing the download procedure Copyright 2001 Cronyx Engineering Ltd 31 32 FLEXIBLE MULTIPLEXER E1 XL aaa Synchronous data transmission In synchronous data transmission mode data is changed in algoristic intervals associated with special clocks The time period during which data cannot be changed is called a bit interval A receiver should read data at time points close to the midpoint of the bit interval If the data are read on the confines of the bit interval it leads to errors A transmitter usually changes data using one of the clock edges e g the rising edge while a receiver reads the data using the other edge the falling one in this example mae A L IEE Ted 1 DATA Bit interval Different interfaces use different ways of clock transmission V 35
29. interfaces only Setting of the multiplexer configuration is executed either using DIP switches or via a control port with RS 232 interface In case of power failure all configuration parameters are stored in a non volatile memory If there is nobody at the far end to enable E1 link loopback it can be activated remotely from the local node The in band management of the remote device is executed over an additional monitoring channel which uses a special timeslot 0 bit compliance with G 704 requirements or any bit of some other timeslot at user s option This monitoring channel is not available in the unframed mode In addition to rack mount and stand alone versions of E1 XL multiplexer there are also versions available representing cards for IBM compatible PCs Cronyx Tau E1 and Cronyx Tau PCI E1 multiplexers On board firmware of desktop multiplexers can be updated via a console port New firmware versions enable to expand multiplexer capabilities Downloading of special firmware versions allows to fully change multiplexer functionality The updates are available at Cronyx web site www cronyx ru This User Manual describes the stand alone version of the device Cronyx ELXL rack mount multiplexers have some functional differences Please follow corresponding instructions supplied with multiplexers of that type to operate them Copyright 2001 Cronyx Engineering Ltd FLEXIBLE MULTIPLEXER E1 XL aa
30. no CD TXC RXC 960 kbps DropO InsertO0 CTS 1 Cable not attached DSR CIS no CD 7 RXC 1 35 J 35 79 135 7 9 1 O timeslots Link 0 to timeslots Link 0 to Timeslots Drop from Link 0 Insert to Link 0 ode Sync Transmit clock Normal Receive clock Receive CTS HDLC buffer Disabled Copyright 2001 Cronyx Engineering Ltd e FLEXIBLE MULTIPLEXER E1 XL 3e YX Se ee ey The synchronous mode has a different set of parameters ory settings Smart Mux TP Sync Link 0 High gain Use16 CRC4 Mon Sa4 TP Sync Link 0 High gain Usel6 no CRC4 Mon Sa4 115200 baud 8n1 Drop0 Tnsert0 CTS 1 Cable not attached DSR CTS no CD 960 kbps Drop0 Tnsert0 CTS 1 Cable not attached DSR CTS RXC 357913 5 79 2 timeslots Link 0 to timeslots from Link O to 1 Dual mode skip TS16 CAS framing Dual mode use TS16 for data Mux mode translate TS16 sync from 1 Mux mode translate TS16 sync from 1 Drop insert mux sync from Link 0 Drop insert mux sync from Link 1 To speed up the procedu
31. non volatile memory NVRAM Configuration parameters saved last can be restored with Restore parameters command Mode command allows to choose one of the two flexible multiplexer modes available two independent devices mode Dual or multiplexer mode Mux Link 0 menu allows to set parameters for E1 0 link Smart Mux TP TP 960 kbps Sync Link 0 Sync Port 0 DTR RTS 960 kbps DTR RTS ETC ETC ERC no High ga High ga Drop0 Insert0 DSR 0 ERC 91 timeslo timeslot Framing Transmit Timeslot 16 Crc4 No Receiver gain Monitoring channel bit Loss of sync action clock Rcv Use High LI in CTS DSR C71 3579 Usel6 Usel6 CTS 1 CTS 1 no CRC4 no CRC4 Cable di CD TXC RXC Cable di CD 1 3 amp 7 Sa4 Copyright 2001 Cronyx Engineering Ltd HHP PEER Remote Alarm Mon Sa4 Mon Sa4 rect RS 530 rect V 35 TXC RXC from 27 FLEXIBLE MULTIPLEXER E1 XL aa
32. occurs e g loss of carrier loss of synchronization power failure etc The activation is executed using dry relay contacts i e the contacts not linked to any electric circuits of the modem The interface also has a pair of input pins The state of the pins closed open is transmitted to the remote device turning on the relay If the multiplexer is installed in an unattended room these input pins can be used for connection of e g remote climatic sensors door unlocking signals etc Warning The input pins should be connected with a switch isolated from electric circuits Failure to comply with this requirement may damage your multiplexer When power supply and the carrier are present pin 3 is shorted to pin 1 At a power failure or a loss of the carrier pin 3 gets disconnected from pin 1 and shorted to pin 2 an alarm state External input contacts has two operation modes normally open and normally closed The default setting is normally open mode When pin 5 gets shorted to pin 4 the remote device switches to an alarm state You can set the normally closed mode from a console in which case the sensor should be normally closed and its opening causes an alarm at the remote device Alarm circuit diagram Alarm state is shown External input sensor CPE Alarm connector of design L Q 0 Pin 1 Shorted to the common pin 3 in normal operation state Open when an error occurs 2 Open i
33. ope COAL hhh DSR 13 E V35 cable for connecting to DCE CTS 15 D with external receive and transmit CD 12 E d F GND 1 gt A clocks for a multi standard GND 16 B interface SEL x 31 39 41 43 DTE2 emulation mode Connect to GND 1 HDB44 Direction M34 RS 232 cable for a multi standard male male interface TXD a 10 Mo R RXD a HDB44 Direction DB25 TXD b 25 4 T RXD b RXD a 8 p TXDa 088 female RXD b 9 S TXD b 10 2 ETC a 6 lt V Rxca RAD 8 3 ETC b 7 lt x 6 4 24 RXC a 5 Not connected TXC 2 15 RXC b 4 Not connected 5 gt 17 RTS 14 4 17 4 21 DR T E DSR RTS 14 4 4 DSR 13 H DTR DIR 11 20 CD 12 C RTS DSR 13 6 TXC a 2 Not connected CTS 15 E 5 TXC b 3 Not connected CD 12 8 CTS 15 Not connected GND 1 gt 1 ERC a 17 Y TXC a GND 16 gt y ERC b 18 lt AA TXC b SEL x 31 35 37 GND 1 A GND Connect to GND 1 x GND 5 530 cable for a multi standard SEL x 31 39 41 43 32 interface Connect to GND 1 HDB44 Direction DB25 V 35 cable for a multi standard ee 1208 a 10 lt 2 interface TXD b 25 lt 14 HDB44 Direction M34 RXD a 8 3 male female RXD b 9 ELE 16 TXD a 10
34. parameters see page 12 The console user interface is implemented as a simple hierarchical menu To select a command you should enter its number Cronyx E1 XL V V revision C 18 01 2001 Mode Smart Link 0 TP Sync Link High gain Usel6 no CRC4 Mon Sa4 Link 1 TP Sync Port 0 High gain Usel6 no CRC4 Mon Sa4 Port 0 960 kbps DropO Insert0 CTS 1 Cable direct RS 530 DTR RTS ETC ERC DSR CIS CD TXC RXC Port 1 960 kbps Drop0 Tnsert0 CTS 1 Cable direct V 35 DTR RTS ET ERC DSR CTS CD TXC RXC 1 1 913579 35791 0 timeslots Link 0 to 1 timesl from Link 0 to Statistics Loopback Test Configure Reset Command Statistics mode is intended for viewing information on current configuration link modes and error counters 220V CH1 V 35 CHO V 35 OO OOOOOOO COOOOOOO 20000000 ALARM GOOOOOOOO OOOOOOOOO OOOOOOOO 00000000 XMT RCV M N C KO x Back panel connectors Copyright 2001 Cronyx Engineering Ltd FLEXIBLE MULTIPLEXER E1 XL YX aaa
35. unframed mode tn ea be 13 Digital port asynchronous mode 15 TSS OF SUC action since 15 Receive path synchronization 15 CLOCK 1s 0 sisnsnsissinsasidevissusnscoxsiviceiasevvisessvisoonsacussnasdvsuseavaroieevsns S 15 CTS generation u c MS 16 Automatic loopback activation remote request 16 Copyright 2001 Cronyx Engineering Ltd FLEXIBLE MULTIPLEXER E1 XL YX EOE a i a aa SS E I SIGUE VO CU a AR A E Sa A E E L a a ae aa NVY
36. 39 41 43 32 TXD a P R RXD a Connect to GND 1 TXD b S lt T RXD b RXD a R P TXD a V 35 cable for connecting to DCE RXD b T S TXD b ETC a U PE V RXCa with external receive and transmit ETC b W lt X RXC b clocks RXC a V U ETC a DTE2 emulation mode RXC b X W ETC b TXC a Y Not connected DCE TXC b AA Not connected M34 male Direction M34 male ERC a BB Not connected TXD a 4 R RXD a ERC b Z Not connected TXD b S 4 RXD b CTS D Not connected RXD a R P TXD a RTS F CD RXD b T S TXD b DTR H lt _ E DSR ETC a U 4 V RXC a DSR E H DIR ETC b W lt X RXC b CD F C RTS RXC a V Not connected GND lt gt A GND RXC b X Not connected GND B gt B GND TXC a Y Not connected TXC b AA Not connected V 35 cable for connecting to DCE aL E Not connected Y TXCa with external transmit clocks for ERC b Z lt AA TXC b a multi standard interface s 4 E DTE1 emulation mode DSR_ BL BIB HDB44 Direction M34 CD C RTS male male GND gt A GND TXD a 10 R RXD a GND B gt GND TXD b 25 4 T RXD b RXD a 8 gt P TXD a RXD b 9 gt S TXD b ETC a 6 lt V RXC a ETC b 7 X RXC b RXC a 5 U ETC a RXC b 4 gt W ETC b RTS 14 lt F CD Copyright 2001 Cronyx Engineering Ltd FLEXIBLE MULTIPLEXER E1 XL eS ee A A I E N LA N E EE E ws s ee ee eS AD US 2 n uum
37. BBHBRH timeslot 26 26 timeslots 1664 kbps BBHBB timeslot 27 BBHRHRB 27 timeslots 1728 kbps BBBHH timeslot 28 BBBHRH 28 timeslots 1792 kbps BBBHB timeslot 29 BBBHB 29 timeslots 1856 kbps BBBBR timeslot30 30 timeslots 1920 kbps BBBBB timeslot 31 BBBRB 31 timeslots 1984 kbps Copyright 2001 Cronyx Engineering Ltd e FLEXIBLE MULTIPLEXER E1 XL 3e YX SS Se a a EAE ee ey ZZ Z Z 77 7 77 77 777777777777777777777777777777777777777777777777777 77777777777777777 7777777777777777777777777777777777777777777777777777777777777 Digital port asynchronous mode RS 232 digital port supports both synchronous and asynchronous data transmission modes The following data rates are available 300 600 1200 2400 4800 9600 19200 38400 57600 or 115200 bps The port provides a support of 8N1 7P1 8P1 asynchronous code format Loss of sync action When a console is used to set configuration parameters you can choose one of the following two types of responses to a loss of E1 link synchronization Loss of sync action Remote Alarm Establishes bit A of timeslot 0 in transmitted E1 frame Loss of sync action AIS AIS is transmitted blue code When DIP switches are used to define configuration settings the parameter is always set to Remote Alarm Receive path synchronization Receive path synchronization can be realized using either signals received from the line RXC or an external sour
38. Cause Serial FIFO buffer error A condition of the use of a single timing source in the link is not met in DTE2 mode timing from ERC clocks Async FIFO buffer error 1 Data rate or asynchronous code format set at the port do not match settings defined on the connected device 2 An excessive deviation from the rating value of the data rate in the connected device IDSL FIFO buffer error A condition of the use of a single timing source in the link is not met E1 Controlled slip A condition of the use of a single Slip operation timing source in the link is not met Ethernet Collision High load of the Ethernet network segment Copyright 2001 Cronyx Engineering Ltd 26 FLEXIBLE MULTIPLEXER E1 XL aa The multiplexer transmits error counter values to a remote device and receives remote error counter values via a monitoring channel 1 link states are shown as a set of flags
39. E1XL Multiplexer User Manual Ineerin g Flexible multiplexer Features Two E1 links PCM 30 Distance up to 1 5 km Two synchronous interfaces V 35 RS 530 RS 449 RS 232 X 21 Ethernet or IDSL modem Asynchronous mode for RS 232 interface Programmable timeslot assignment G 704 frame alignment CAS and CRC4 multiframe align ment G 703 2 048 kbps unframed mode Cronyx PCM2 modem compatibility Data rates from 64 to 2 048 kbps Timing from the digital interface of receive and transmit path DTE emulation Three to one multiplexer mode Drop Insert multiplexer mode Copyright 2001 Cronyx Engineering Ltd Certified by the Russian Ministry of Communications Digital local and remote loopbacks Integrated BER tester RS 232 port for monitoring and control purposes Alarm interface dry contacts Stand alone or rack mount 19 3U design AC or DC built in power supply unit Upgradeable firmware The Certificate No 1 19 of Electrosvyaz Sertification Sys tem issued by the Russian Ministry of Communications 1 0E 01 05 2001
40. ND RXD a 8 6 SEL x 31 39 41 43 32 RXD b 9 gt 24 6 T 17 Connect to GND 1 on both connectors ETC b 7 lt 35 2 5 X 21 cable for a multi standard TXC b 3 gt 23 RXC a 5 8 _____ RXC b 4 26 HDB44 Direction DB15 ERC a 17 4 3 male female ERC b 18 lt 21 TXD a 10 lt 2 RTS a 14 4 7 TXD b 25 lt 9 RTS b 29 4 25 RXD a 8 4 DTR a 1l lt 12 RXD b 9 11 DTR b 26 lt 30 ETC a 6 7 13 11 ETC b 7 lt _ 14 DSR b 28 29 TXC a 2 ETE 6 CTS a 15 9 TXC b 3 p 13 CTS b 30 27 RTS a 14 lt 3 CD a 12 13 RTS b 29 lt 10 CD b 27 31 CD a 12 5 GND 1 gt 1 CD b 27 p 12 GND 16 19 GND 1 gt 1 SEL x 31 33 37 GND 16 gt 8 Connect to GND 1 SEL x 33 37 Connect to GND 16 Cable for connecting two devices with a multi standard interface HDB44 Direction HDB44 male male TXD a 10 lt 8 RXD a TXD b 25 4 9 RXD b RXD a 8 10 TXD a RXD b 9 25 TXD b 39 Copyright 2001 Cronyx Engineering Ltd FLEXIBLE MULTIPLEXER E1 XL aa
41. ccuracy of the frequency Circuit technologies used in E1XL multiplexer ensure the phase jitter and accuracy of output frequency to meet the corresponding requirements of ITU T in those modes where the multiplexer is selected as a timing source If the timing source represents any other device connected to E1 XL digital port DTE1 and DTE2 emulation modes always make sure that clock signal parameters comply with ITU T standards X 21 interface Electric specifications of X 21 interface signals meet the corresponding requirements of ITU T V 11 The interface has a different set of signals as compared with all other interfaces MUX A MUX B MEE X DTEB RXD CD 4 Carrier cD DSR lt Q ON ON DSR CTS lt cts fcdts cts f cd rts CTS Normal Normal operation operation X 21 RS 232 DB 15 2 Transmit A 9 Transmit B 4 Receive A 11 Receive B 7 ETC A 14 ETC B 6 Sig Timing A 13 Sig Timing B 3 Control A 10 Control B 5 Indication A 12 Indication B 1 Shield 8 GND X 21 interface uses the single clock signal for received and transmitted data To ensure the correct data reception you should strictly follow the requirement of using a single timing source Two interconnected devices should have settings that allow to use the same clock gen
42. ce ERC The synchronization from an external source is used when connecting to DCE devices which do not support an external synchronization from a digital port RS 232 V 35 RS 530 In this case the modem issues data using clocks received at ERC input The phase equalization of data at the output of RXD digital port for ERC clocks is executed using FIFO buffer To ensure the correct buffer operation with no overruns underruns the frequency of clocks received from the line should equal to the frequency at ERC input This condition is met when the data link has a single timing source Otherwise recurrent errors will occur due to overruns or underruns of FIFO buffer The rate of such errors depends on the difference between the two frequencies ERC mode can be enabled from a console only When DIP switches are used to set configuration parameters of the modem ERC mode is disabled Clock inversion In INT From Link 0 and From Link 1 synchronization modes TXD data is delayed in relation to TXC clocks The total delay is formed of delays occurring in the cable and in the digital interface of the equipment connected to the modem As a result errors can occur at some data rates The problem can be solved in the following ways Invert TXC by changing settings of the equipment connected to the modem Change the cable length Reverse TXC a and TXC b pins in one of the interface cable connectors When a console is used to set configuration parame
43. e case of specialized lines or using self synchronizing codes when data is transmitted over communication lines In the simplest example of two V 35 routers connected using synchronous leased line modems an internal clock generator of one of the modems INT is used as a timing source The second modem derives clocks from the signals it receives from the line RCV Both routers as DTE devices receive clocks from the modems A B INT RCV CLK DTE A xz Tx DTEB RXC RXC Single timing from Device A The problem that can arise even in this simplest case is in the fact that data received at the modem TXD and clocks accompanying the data TXC have different directions and are transmitted time lagged TXC signals arrive in DTE with 11 delay caused by internal modem circuits connecting cable and router interface used Using a TXC clock edge a router changes TXD data which returns to the modem with t2 delay If t1 12 equals to a half cycle of the clock then the change of the data at the input will fall just on the edge used by the modem to consider data valid Copyright 2001 Cronyx Engineering Ltd 33 FLEXIBLE MULTIPLEXER E1 XL eS Sa ee Ee a ee ee eS OA D US 2 n uum ope
44. e signals received from the line RCV or an external source EXT The external source usually represents a signal received at ETC interface input Copyright 2001 Cronyx Engineering Ltd e FLEXIBLE MULTIPLEXER E1 XL YX Se Se a OE EE ee ey ZZ Z 77 7 7 7 7777 7 7 77777777777777 7777777777777777777777777777777777777777777777777777 7777777777777777777777777777777777777777777777777777777777777 In addition to the bit synchronization the serial data transmission also requires to have byte boundaries determined For this purpose the bit flow is divided into frames The beginning of a frame serves as a byte reference point Digitized voice data are transmitted using the frame format described in ITU G 704 Computer networks mostly use HDLC standard of bit flow to frames alignment FLAG ADDRESS CONTROL DATA CRC FLAG HDLC frame format Frames are separated by certain bit chains called flags HDLC protocol flag is 01111110 A procedure of stuffing insertion throwing of zeroes in sequences of more than five ones is used in order this chain not to be found in data Considerations on building synchronous links Synchronous links are usually built based on the principle of using a single timing source It means that a data link between two DTE devices uses the same clock generator for timing all the data flows in the link The transmission of clocks is executed either in the DCE DTE butting in th
45. eas the reading of the data 15 executed using clocks transmitted to ERC pins of the interface connector external receive clocks Thus FIFO buffer equalizes the clocks phase In this case Cronyx modem emulates DTE interface receiving transmit clocks at ETC input and receive clocks at ERC input The requirement of using a single timing source remains in force If it is impossible to ensure the use of a single timing source in the link then the clocks on one side of the buffer will differ in frequency from the clocks on the other side of the buffer It causes recurrent buffer overruns underruns depending on what side of the buffer has clocks of higher frequency If data transmitted over the link represents HDLC format packets the frequencies offset can be compensated owing to the fact that data in HDLC flow has gaps stuffed with special bit chains 01111110 called flags Cronyx modems allow to enable FIFO buffers in HDLC mode In this case the control logic inserts HDLC flags between frames if the buffer tends to an underrun but throws odd HDLC flags if the buffer is threatened with an overrun The frequencies offset which can be compensated in that way depends on the length of HDLC packets and on the number of flags between the packets this mode is not available when less than two flags are used between the packets The typical length of HDLC frames in IP networks is 1 500 bytes and the minimum number of flags between the frames is 2 In this ca
46. erator as a timing source for both devices Indication signal corresponds to CD signal whereas Control signal corresponds to RTS signal Loopbacks Normal operation LOOP2 switch is in 0 position Copyright 2001 Cronyx Engineering Ltd FLEXIBLE MULTIPLEXER E1 XL Local loopback LOOP1 switch is in LOC position LOOP2 switch is used to choose the number of E1 link DTEA TXD MUX A RXD G CD 4 DS DSR 44 OFF RTS CTS 4 cts f cd rts Remote loopback LOOP1 switch is in REM position LOOP2 switch is used to choose the number of E1 link The remote device automatically enables and disables local loopbacks on requests from the local device DTEA Digital loopback LOOPI switch is in DIG position LOOP2 switch is used to choose the number of the digital interface DTEA RTS Local loopback MUX B TXD Carrier OK CD ON gt RTS cts f cd rts gt CTS Normal operation DTEB MUXA MUX B RXD CD lt Q Carier OK Carrier OK _ DSR OFF DSR RTS RTS CTS
47. f timeslots 51 6 51 10 and S2 6 82 10 microswitches determine the number of timeslots to be used for data transmission of links 0 and 1 respectively In multiplexer mode all other timeslots are translated unchanged between E1 0 and 1 1 links Data rate depends on the number of selected timeslots Nx64 kbps Data rate in the unframed mode When a console is used to set configuration parameters there are six options of the data rate in the unframed mode 64 128 256 512 1024 or 2048 kbps Note that the line bandwidth remains the same 2 048 kbps You just decrease the rate at the digital port only Copyright 2001 Cronyx Engineering Ltd 13 FLEXIBLE MULTIPLEXER E1 XL aa S1 1 S1 5 E1 0 initial timeslot S2 1 S2 5 E1 1 initial timeslot 1 6 51 10 number link 0 rate 52 6 52 10 number link 1 rate 14
48. ing clocks of its internal generator INT or the ones received from the line RCV A B EXT RCV RCV INT TXC TXC RXC Le RXC UU Connection of two DCE devices via the digital interface Device B does not have ETC input Clock transmission path is shown If all the devices used in the link are set to have a single timing source then the clocks at RXC output will have the same frequency from the same source as transmit path clocks of the second modem will have There will be no errors in the link if the phase shift between these clocks does not equal to exactly a half cycle that is unlikely to happen Cronyx synchronous modems have DTE2 emulation mode that allows to eliminate any chance for the occurrence of such a situation In this mode the digital interface has a FIFO buffer enabled in the received data path INT TXC RXD Connection of two DCE devices via the digital interface Device A uses FIFO buffer Clock transmission path is shown Copyright 2001 Cronyx Engineering Ltd 35 36 FLEXIBLE MULTIPLEXER E1 XL Ee SS a ee Ee ee eS t F Z 777 777 77 77777777777777777777777777777777777777777777777777777 77777777777777777777 7777777777777777777777777777777777777777777777777777777777 Data is written to the buffer using clocks received from the line wher
49. iplexer Drop Insert multiplexer Three to one multiplexer In this configuration both digital links transmit and receive data via E1 0 link but use different timeslots Unused timeslots are translated into E1 1 link Two devices connected by E1 link enable the transmission of data between digital ports There should be no cross connection between timeslots assigned to each digital port RS 530 RS a RS 530 RS 232 V 35 _ Digital Digital 232 V 35 X21 interface interface X21 Ethernet 0 0 Ethernet IDSL E1 link IDSL RS 530 RS Digital EN max 1 5 km 3 Digital RS 530 RS 232 V 35 X2 1 i interface interface interface interface Ethernet 1 1 Ethernet IDSL IDSL 1 1 E1 sublink interface interface E1 sublink max 1 5 km 1 1 max 1 5 km To RS 232 terminal Control port Control port To RS 232 terminal Two E1 XL multiplexers in three to one multiplexer mode Below is an example of E1 XL device application in three to one multiplexer mode The following figure depicts the concurrent interconnection of routers LANs and PBXs via the same link Hub Ethernet Hub Router J Ethernet Router An example of E1XL application in three to one multiplexer mode Copyright 2001 Cronyx Engineering Ltd FLEXIBLE MULTIPLEXER E1 XL aa
50. k of multiframe alignment on CRC4 When DIP switches are used to set configuration parameters the check of multiframe alignment on CRC4 is disabled Location of the monitoring channel in E1 frame The control of a remote device and statistics interchange are executed over a monitoring channel which uses a single bit of El frame When a console is used to set configuration parameters you can arbitrarily select a bit of any timeslot for the monitoring channel When DIP switches are used to set configuration parameters the monitoring channel uses Sa4 bit of timeslot 0 in compliance with ITU T G 704 recommendations Initial timeslot S1 1 S1 5 and S2 1 82 5 microswitches determine the number of the initial timeslot for data links 0 and 1 respectively In independent links mode link 0 settings refer to E1 0 link and link 1 settings refer to E1 1 link In three to one multiplexer mode settings for both links refer to E1 0 link and determine timeslots to be transmitted to digital interfaces 0 and 1 In three to one multiplexer mode timeslot sets should not overlap Nonselected timeslots are translated into E1 1 link In Drop Insert multiplexer mode timeslot selection settings refer to the corresponding port Selection of timeslots to be used in E1 0 and E1 1 links depends on the direction of data transmission set using S3 5 83 8 microswitches In the unframed mode the above settings are of no account Number o
51. le without modem control DIP switches The stand alone version has the DIP switches J located on the bottom cover of the device A S1 group link 0 timeslots S2 group link 1 timeslots Link 0 timeslots 53 group modem configuration and timing Sag modes Configuration and The following designations are used to show synchronization of the microswitches B OFF position Link 1 timeslots L ON position Console Bottom cover view M The front panel of the multiplexer is equipped le 9 i with DB9 connector intended for connection of a control terminal a console with RS 232 9600 kbps interface The console can be used to monitor current operation modes of the device as well as link status and statistics on both local and remote errors Ifthe remote control is enabled using S3 9 microswitch a user can set device modes from the console and save them in a non 10 volatile memory Copyright 2001 Cronyx Engineering Ltd FLEXIBLE MULTIPLEXER E1 XL Se ee a ee OE EE ee cO nt
52. med mode parameters Automatic loopback activation on a remote request not available Allowed Not allowed Scrambler not available Disabled Enabled Data rate 64 128 256 kbps 512 1024 2048 ALARM dry contacts parameters Operation from input pins of a remote device From closing From closing From opening Copyright 2001 Cronyx Engineering Ltd FLEXIBLE MULTIPLEXER E1 XL a a i a a SS a a a a a a a ae aa Timeslot 16 assignment E1 0 and E1 1 link timeslot 16 assignment mode can be changed from a console only Timeslot 16 can be used for generation of standard CAS clock signals and signal bits abcd 1111 xyxx 1011 in which case the timeslot cannot be used for data transmission In multiplexer mode you should enable the data transmission via timeslot 16 in both E1 0 and E1 1 links to ensure a transparent translation of timeslot 16 from E1 0 into E1 1 When DIP switches are used to set configuration parameters timeslot 16 is used for data transmission CRC4 multiframe alignment When a console is used to set configuration parameters of the multiplexer you can enable a chec
53. n normal operation state Shorted to the common pin 3 when an error occurs Common pin GND Input pin GND O A w Back panel connectors There are digital interface connectors and removable terminal blocks of E1 links located on the back panel Digital ports with V 35 interface use standard M 34 female connectors DB 25 RS 232 Direction P TD a Input S TD b Input R RD a Output T RD b Output U ET a Input W ET b Input Y TC a Output AA TC b Output BB ERC a Input Z ERC b Input V RC a Output X RC b Output C RTS Input H DTR Input E DSR Output D mode Output F DCD Output A CGND B SGND Copyright 2001 Cronyx Engineering Ltd e FLEXIBLE MULTIPLEXER E1 XL YX SS ee a ee EE OE EE ee ey Digital ports with RS 232 RS 530 interfaces Digital ports with a multi standard interface use
54. n the unframed mode Serving as a modem the device allows to build high speed data links based on twisted pair or coaxial cables of up to 1 5 km in length Serving as a multiplexer the device enables to split E1 flow into several maximum 30 data flows wherein DTE units using these separated data flows can be located at a distance of up to 1 5 km Drop Insert mode provides connection layouts of network equipment that considerably increase the efficiency of E1 PCM30 links Stand alone version of the multiplexer can be at customer s option equipped with RS 530 RS 232 V 35 or X 21 interfaces ended with standard connectors as well as with built in Ethernet or IDSL modem units There is also a multiplexer version with a multi standard interface ended with HDB44 connector in which case the interface type is determined by the adapter cable The multi standard interface supports RS 232 RS 530 RS 449 RS 422 V 35 and X 21 standards Two Cronyx E1XL devices with Ethernet interface or a combination of Cronyx E1 XL and Cronyx E1L devices with Ethernet interface form a Remote Bridge for interconnecting two LANs In the unframed mode you can use a Cronyx E1XL device together with a Cronyx PCM2 modem The rack mount version of the multiplexer represents two physical units one of which is inserted at the front side of the rack while another one is inserted at its back side This version of the multiplexer is equipped with multi standard
55. nterface Aa I 6 RD Ethernet interface complies with 10BaseT standard 7 Not used Two devices with this interface form a Remote Bridge 8 Not used and are used to interconnect two LANs The Remote Bridge is capable of filtering packets i it passes over those packets only that have recipients in the LAN on the other side of the link Cronyx E1 XL with Ethernet interface can compress Ethernet packets by truncating stuff bits required to form fixed length packets Cronyx E1 XL with Ethernet interface can work together with other devices equipped with Ethernet interface made by Cronyx Engineering Ltd PCM2D E1L and BRDG A Remote Bridge formed of two Cronyx devices has the following specifications Interface type 10BaseT UTP Connector type RJ45 Operation modes Half Duplex Full Duplex Filtering rate 15000 packets sec LAN table size 10000 MAC addresses The following figure depicts a statistics screen for devices with Ethernet interface Besides Ethernet interface parameters Coll column also shows the number of seconds during which collisions occurred for local and remote devices respectively Copyright 2001 Cronyx Engineering Ltd e FLEXIBLE MULTIPLEXER E1 XL 3e YX SS Se en GU a EAE ee ey
56. ock transmission path is shown 34 Copyright 2001 Cronyx Engineering Ltd e FLEXIBLE MULTIPLEXER E1 XL YX Se Se a OE EE ee ey In this mode the modem transmits data to the line using a clock received at the input of ETC interface The data received by the first modem from the line along with the accompanying clock enter RXD and RXC outputs Then the data and the clock are transmitted to TXD and ETC inputs of the second modem which transmits them farther on to the line The return flow has the similar path In this scheme the retransmission of data and clocks received from the line occurs i e the timing source is located outside the devices considered It may be possible that none of the devices supports the mode of external transmit path synchronization EXT In this case you can select ETC input as a transmit path timing source for one of the modems only Here the modem which does not have such a mode defined will receive data at TXD input us
57. oes and ones in G 703 output signal The scrambler can be enabled only if a console is used to set configuration parameters When DIP switches are used to set configuration parameters it is always disabled Receive path sensitivity Receive path sensitivity determines the maximum length of E1 line When a console is used to set configuration parameters of the multiplexer you can choose one of the following two sensitivity values 12dB or 36dB When DIP switches are used to define configuration settings the reception path sensitivity is always set to 36dB Synchronization modes Single timing source In independent links mode a single timing source for E1 path is usually used The timing source can represent either an internal clock generator of an E1 multiplexer or an external signal of a DTE device The following figures depict examples of internal and external timing sources Copyright 2001 Cronyx Engineering Ltd FLEXIBLE MULTIPLEXER E1 XL SS ee a ee X ICENCOIOEY Oe ae ee Ue ne repr eee
58. ollowing table contains information on positions of LOOP1 and LOOP2 switches enabling certain loopbacks Loopback LOOP1 LOOP2 Disabled Any OFF E170 local loopback LOC LO E1 1 local loopback LOC L1 E1 0 remote loopback REM LO E1 1 remote loopback REM L1 Interface 0 digital loopback DIG LO Interface 1 digital loopback DIG L1 Front panel indicators IndicatorFunction PWR power present RTS digital interface signals RERR remote device errors LERR local device errors TST testing modes Ethernet port RTS indicator shows that the port has a fault free cable connected TST indicator shows the selected testing mode Off Normal operation On Bit error rate tester is enabled Blink Local loopback is enabled Single Remote loopback is enabled flashes Double Digital loopback is enabled flashes In normal operation mode LERR indicator lights up in the absence of an input signal in E1 line or when there is a loss of frame or multiframe alignment recorded When the BER tester is enabled LERR indicator is on in the presence of errors in the line RERR indicator is on at the loss of synchronization at a remote device bit A of timeslot 0 Jumpers Positions of jumpers inside the multiplexer case are shown on the figure below To change the positions you should unfasten mounting screws fixing the top cover of the device and then remove the cover Warning Before removing the cover alwa
59. on the difference between the two frequencies If the data transmitted in the link is in HDLC format you can compensate the frequencies offset enabling HDLC buffer mode MUX A DCE TXD Ep RXC ETC TXD FIFO TXC Y ERC s HDLC mode ENABLE DISABLE ETC ERC MUX B DTE DTE2 emulation mode with external transmit and receive clocks Copyright 2001 Cronyx Engineering Ltd 19 FLEXIBLE MULTIPLEXER E1 XL Ee SS a ee Ee ee ee eS TH5 Timing source specifications Clock pulses can be sourced from either the internal clock generator of E1 XL multiplexer or an external synchronization input of the digital port The source of clock pulses used to generate an output 1 signal determines parameters such as phase jitter and the a
60. put 39 SEL 4 SEL 4 SEL 4 SEL 4 41 SEL 5 SEL 5 SEL 5 SEL 5 EE 43 SEL 6 SEL 6 SEL6 SEL 6 Output 7 ETC A Input 32 DCE DCE DCE DCE SA B ED i The pin should be shorted to GND 13 S B Output 3 C A Input 10 C B Input 5 Output 12 Output 1 8 GND GND 23 Copyright 2001 Cronyx Engineering Ltd 24 FLEXIBLE MULTIPLEXER E1 XL asame Management using a console The front panel of the multiplexer is equipped with a DB9 connector intended for connection of a control terminal a console with RS 232 interface 9600 kbps 8N1 The console can be used to monitor current operation modes of the device as well as link status and statistics on both local and remote errors If the remote control is enabled using S3 9 microswitch a user can set device modes from the console and save them in a non volatile memory Some parameters can be set from the console only For a list of
61. pyright 2001 Cronyx Engineering Ltd Selection of data drop link In multiplexer mode 3 5 and S3 7 microswitches determine E1 links for digital ports 0 and 1 respectively where to drop data from S3 5 data drop link for port O Drop0 53 7 data drop link for port 1 Brop1 B E1 0 E1 1 Transmit path synchronization 53 1 S3 2 and 53 3 S3 4 pairs of microswitches allow to select a transmit path synchronization mode for E1 0 and E1 1 links respectively S3 1 S3 2 E1 0 link synchronization Brp S3 4 E1 1 link synchronization INT internal clock generator From Link X from the receiver From Link from the other link receiver From Port X from the digital interface When a console is used to set configuration parameters you can also set the transmit path synchronization from the other link digital interface E1 link mode In Dual mode E1 links can be configured to work either with or without frame alignment support G 704 The parameter can be changed from the console only When DIP switches are used to set configuration parameters the frame alignment support mode G 704 15 always enabled 11 12 FLEXIBLE MULTIPLEXER E1 XL aa
62. re of setting configuration parameters you can select one of the four factory settings intended for the most common applications of the multiplexer and then adjust parameters as required Dual mode skip TS16 CAS framing Two independent devices mode CAS multiframe alignment is used Mode Dual Smart Link 0 TP Sync Int High gain Skip16 no CRC4 Mon Sa4 Link 1 TP Sync Int High gain Skip16 no CRC4 Mon Sa4 Port 0 1920 kbps CTS 1 Port 1 1920 kbps CTS 1 1357 913 57 9238 5 7 9 1 Timeslots 0 W W 9 H W W W HH HH Timeslots 1 Dual mode use TS16 for data Two independent devices mode Timeslot 16 is used for data transmission Mode Dual Smart Link 0 TP Sync Int High gain Usel6 no CRC4 Mon Sa4 Link 1 TP Sync Int High gain Usel6 no CRC4 Mon Sa4 Port 0 1984 kbps CTS 1 Port 1 1984 kbps CTS 1 Jf 3 5 7 9 J S 5 7 9 1 S 5 7 9 1 Timeslots ati ta tH HH EH EH EE H H 29 Copyright 2001 Cronyx Engineering Ltd 30 FLEXIBLE MULTIPLEXER E1 XL aa
63. se the maximum frequencies offset which can be compensated using such a buffer is not less than 200 ppm HDLC Buffer Enabl FLAG INS DEL RDATA RECEIVER RFIFO RXD RCLK ERC TXD TDATA MA NM TRANSMITTER TFIFO TCLK TCLK ETC FLAG INS DEL Selection of the timing source for v transmit path I N OSCILLATOR HDLC buffer operation diagram Copyright 2001 Cronyx Engineering Ltd e FLEXIBLE MULTIPLEXER E1 XL YX SS E E E a a EAE ee TE DTR 11 lt _ DSR Connector pin assignments CD 12 C RTS TXC a 2 Not connected TXC b 3 Not connected V 35 cable for connecting to DCE ERC a 17 _ Not connected 2 ERC b 18 Not connected with external transmit clocks CTS 45 Noreennscted DTE1 emulation mode GND 1 lt x A GND CronyxE1 DCE 16 B GND M34 male Direction M34 male SEL x 31
64. slots of a corresponding E1 link arrives at the digital port output Unused timeslots are ignored In this mode the framing of data in E1 flow can be disabled so as data can be transmitted unframed In this case data occupies all the 2 048 kbps bandwidth but its rate at the digital port may be limited Digital interface 0 RS 530 RS 232 V 35 X 21 Ethernet IDSL Digital interface 1 RS 530 RS 232 V 35 X 21 Ethernet IDSL 1 E1 link 0 interface 0 max 1 5 km To RS 232 terminal 1 E1 link 0 interface 1 max 1 5 km E1 XL in two independent devices mode Copyright 2001 Cronyx Engineering Ltd e FLEXIBLE MULTIPLEXER E1 XL YX SS ee a ee EE OE EE ee ey Multiplexer mode In multiplexer mode timeslots that are not used for digital port data transmission are translated undistorted between E1 links E1XL flexible multiplexer allows to allocate every digital port data in different E1 links separate for both directions of data transmission That is you can assign separate E1 links of data drop and insert for every digital port The most common configurations include Three to one mult
65. ster modes cannot be stored in a non volatile memory Copyright 2001 Cronyx Engineering Ltd FLEXIBLE MULTIPLEXER E1 XL Ee ee a SE WE ey Configure menu allows to set operation modes of the modem provided that S3 9 microswitch is in ON position Con Mode Lin Lin Por Port OO Q N P figure Smart Mux TP TP 960 kbps Sync Link 0 Sync Port 0 Drop0 Tnser RTS ETC ERC 960 kbps DTR RTS Drop0 Tnser ETC no 1 High ga High ga DSR timeslots timeslots Mode Mux Lin Lin Por Por Ds Alarm input Normal Factory settings Save parameters tore parameters Res in in CTS 16 16 5 1 CTS 1 DSR CTS 3 7 9 no CRC4 no CRC4 Cable di CD TXC RXC Cable di CD 135791 Mon Sa4 Mon Sa4 rect RS 530 rect V 35 TXC RXC from After setting parameters you should use Save parameters command to save them in a
66. ters apply TxC clocks inversion The similar problem can also occur when external clocks of ERC receive path are used The problem can be solved in the same ways as above Change the cable length Reverse ERC a and ERC b pins in one of the interface cable connectors When a console is used to set configuration parameters apply ERC clock inversion Clock inversion parameters can be set from a console only When DIP switches are used to set configuration parameters clocks always remain non inverted Copyright 2001 Cronyx Engineering Ltd 15 FLEXIBLE MULTIPLEXER E1 XL aa COOL shhh CTS generation logic When a console is used to set configuration parameters you can select one of the following four rules of CTS output signal generation CTS 1 CTS CD CTS RTS or CTS CD RTS When DIP switches are used to set configuration parameters CTS 1 rule is always applied Automatic loopback activation on a remote request The parameter applies to the unframed mode only In complex configurations with a daisy chain of multiple devices this parameter can be used to choose a network section to be tested using a remote loopback The parameter can be changed from a console only When DIP switches are used to set configuration parameters the loopback activation on a remote request is always enabled Scrambler The parameter applies to the unframed mode only The scrambler is used to eliminate long sequences of zer
67. ys make sure that the device is disconnected from the 220V mains Line impedance The default factory configuration of the multiplexer is intended for use with twisted pairs 120 Ohm 1 line impedance is set by jumpers numbering three for each link You should remove the jumpers for twisted pairs and replace them for coaxial cables 75 Ohm Copyright 2001 Cronyx Engineering Ltd FLEXIBLE MULTIPLEXER E1 XL Ee SS ee ee SORIA D UE ee E uum COAL hhh The console connector has standard pin layout It is recommended to use cables with the following connector pin assignments 5 GND lt GND 3 TXD TXD 2 RXD RXD E1 1 link impedance RTS 4 RTS jumpers E1 0 link impedance jumpers DB9 2 98 CTS gt CTS X 24 DTR 61 CD T DSR Er Programming mode i Enabling um Cable with modem control NORM npe 5 GND GND TXD TXD Programming mode O 2 RXD RXD g Q To download a new version of the on board 1 2 7 RTS RTS firmware you should reposition two internal ii 2 8 CTS CTS Do jumpers from NORM to PROG Upon 4 completion of programming procedure 1 CD te an return the jumpers to NORM position Cab
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