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E1XL Multiplexer
User Manual
1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 1 2 3 4 5 6 7 8 9 0 1 2
1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 1 2 3 4 5 6 7 8 9 0 1 2
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
E1XL
Rev. D
• 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. ÎÑ/1-ÑÏÄ-19
of Electrosvyaz Sertification Sys-
tem issued by the Russian Ministry
of Communications
1.0E / 01.05.2001
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Table of Contents
Related Manuals for Cronyx E1XL
Summary of Contents for Cronyx E1XL
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Page 1: Features
Russian Ministry • G.703 2,048 kbps unframed mode of Communications • Cronyx PCM2 modem compatibility • Data rates from 64 to 2,048 kbps • Timing from the digital interface of receive and transmit path (DTE emulation) •... -
Page 2: Table Of Contents
Data rate in the unframed mode ..................... Digital port asynchronous mode ..................... Loss of sync action ........................... Receive path synchronization ......................Clock inversion ..........................CTS generation logic .................. 16 Automatic loopback activation on a remote request ..............Copyright © 2001 Cronyx... - Page 3 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...
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Page 4: Specifications
Connector ............Mini DIN, 6 pins Control port Interface type ............ RS-232 Data transfer protocol ........asynchronous, 9600 kbps, 8N1 Connector ............DB9 female Diagnostics modes Loopbacks............digital (via digital interface), or local (via G.703 line at a local device), or Copyright © 2001 Cronyx... -
Page 5: Description
Cronyx web site www.cronyx.ru. Two Cronyx E1XL devices with Ethernet This User Manual describes the stand-alone interface or a combination of Cronyx E1XL and version of the device. Cronyx E1L devices with Ethernet interface form a Remote Bridge for interconnecting two LANs. -
Page 6: Package Contents
(max. 1.5 km) interface 0 V.35, X.21, Ethernet, IDSL To RS-232 terminal Control port Digital interface 1 E1 link 0 Е1 RS-530, RS-232, interface 1 (max. 1.5 km) V.35, X.21, Ethernet, IDSL E1-XL in two independent devices mode Copyright © 2001 Cronyx... -
Page 7: 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. -
Page 8: Drop-Insert" Multiplexer Mode
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. -
Page 9: Controls And Indicators
(120 Ohm). E1 line impedance is set by jumpers RERR remote device errors numbering three for each link. You should remove LERR local device errors the jumpers for twisted pairs and replace them testing modes for coaxial cables (75 Ohm). Copyright © 2001 Cronyx... -
Page 10: Programming Mode
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. Copyright © 2001 Cronyx... -
Page 11: Configuration Parameters
Selection of operation mode interface. S3-10 microswitch position determines E1XL link configuration: E1 link mode S3-10 — Configuration In Dual mode E1 links can be configured to work... - Page 12 64, 128, 256, (kbps) 512, 1024, 2048 ALARM «dry» contacts parameters Operation from From closing From closing, input pins of a From opening remote device * - The parameter can be changed from a console only. Copyright © 2001 Cronyx...
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Page 13: Timeslot 16 Assignment
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... - Page 14 26 timeslots — 1664 kbps timeslot 27 27 timeslots — 1728 kbps timeslot 28 28 timeslots — 1792 kbps timeslot 29 29 timeslots — 1856 kbps timeslot 30 30 timeslots — 1920 kbps timeslot 31 31 timeslots — 1984 kbps Copyright © 2001 Cronyx...
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Page 15: Digital Port Asynchronous Mode
• 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... -
Page 16: Cts Generation Logic
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... -
Page 17: 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. MUX А MUX В From Port DTE A DTE B Separate timing from DTE A and multiplexer B Copyright © 2001 Cronyx... -
Page 18: Synchronization In Multiplexer Mode
(loss) of data frames. DTE emulation There are two clock pulse inputs (ERC and ETC) provided for connection of E1XL 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. -
Page 19: 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 E1XL multiplexer receives data at the digital port using clocks received at ETC input and transmits data using clocks received at ERC input. -
Page 20: Timing Source Specifications
If the Indication (A) timing source represents any other device Indication (B) connected to E1XL digital port (DTE1 and DTE2 Shield emulation modes) always make sure that clock signal parameters comply with ITU-T standards. -
Page 21: Local Loopback
LOOP1 switch is in DIG position; LOOP2 switch is used to choose the number of the digital interface. MUX А MUX В DTE A DTE B "ON" Carrier OK "ON" "ON" cts=f(cd,rts) cts=f(cd,rts) Digital Normal loopback operation Copyright © 2001 Cronyx... -
Page 22: Alarm Interface
TC-a Output TC-b Output ERC-a Input ERC-b Input Alarm circuit RC-a Output diagram RC-b Output Input Alarm state is shown Input Output mode Output Output CGND — SGND — External input sensor (CPE) Copyright © 2001 Cronyx... - Page 23 SEL-6 SEL-6 R(B) Output ETC (A) Input ETC (B) Input * - The pin should be shorted to GND S(A) Output S(B) Output C(A) Input C(B) Input I(A) Output I(B) Output 1, 8 GND GND — Copyright © 2001 Cronyx...
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Page 24: Management Using A Console
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, Mux Link 0: TP, Sync=Link 0, High gain, Use16, no CRC4, Mon=Sa4... - Page 25 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...
- Page 26 2. 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 tester modes cannot be stored in a non-volatile memory. Copyright © 2001 Cronyx...
- Page 27 Port 1 timeslots: ....############### - from Link 0 to Link 0 1. Framing: E1 2. Transmit clock: Rcv 3. Timeslot 16: Use 4. Crc4: No 5. Receiver gain: High 6. Monitoring channel bit: Sa4 7. Loss of sync action: Remote Alarm Copyright © 2001 Cronyx...
- Page 28 Port 1 timeslots: ....############### - from Link 0 to Link 0 1. Timeslots... 2. Drop from: Link 0 3. Insert to: Link 0 4. Mode: Sync 5. Transmit clock: Normal 6. Receive clock: Receive 7. CTS = 1 9. HDLC buffer: Disabled Copyright © 2001 Cronyx...
- Page 29 Link 1: TP, Sync=Int, High gain, Use16, no CRC4, Mon=Sa4 Port 0: 1984 kbps, CTS=1 Port 1: 1984 kbps, CTS=1 1 3 5 7 9 1 3 5 7 9 1 3 5 7 9 1 Timeslots 0: ############################### Copyright © 2001 Cronyx...
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Page 30: Ethernet Interface
Bridge is capable of filtering packets, i. e. 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. -
Page 31: 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 console port. Firmware updates are available at Cronyx web site www.cronyx.ru. The software package includes detailed instructions describing the download procedure. -
Page 32: Synchronous Data Transmission
(INT), a clock derived by the PLL from the 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... -
Page 33: Considerations On Building Synchronous Links
If t1 + t2 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... - Page 34 The simplest way to realize such a connection is to use the mode of external synchronization of transmit paths in both devices (EXT). В А LINE LINE Connection of two DCE devices via the digital interface. Clock transmission path is shown. Copyright © 2001 Cronyx...
- Page 35 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.
- Page 36 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.
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Page 37: Connector Pin Assignments
AA TXC-b a multi-standard interface (DTE1 emulation mode) HDB44 Direction (male) (male) TXD-a 10 RXD-a TXD-b 25 RXD-b RXD-a 8 TXD-a RXD-b 9 TXD-b ETC-a 6 RXC-a ETC-b 7 RXC-b RXC-a 5 ETC-a RXC-b 4 ETC-b Copyright © 2001 Cronyx... -
Page 38: Cable For Connecting To Dce With External Receive And Transmit Clocks, For A Multi-Standard Interface
ETC-a 6 RXC-b 4 ETC-b 7 ERC-a 17 TXC-a 2 ERC-b 18 TXC-b 3 RTS-a 14 RXC-a 5 RTS-b 29 RXC-b 4 DTR-a 11 ERC-a 17 DTR-b 26 ERC-b 18 DSR-a 13 DSR-b 28 CTS-a 15 Copyright © 2001 Cronyx... -
Page 39: Rs-449 Cable For A Multi-Standard Interface
SEL-x 33,37 Connect to GND 1 Connect to GND 16 Cable for connecting two devices with a multi-standard interface HDB44 Direction HDB44 (male) (male) TXD-a 10 RXD-a TXD-b 25 RXD-b RXD-a 8 TXD-a RXD-b 9 TXD-b Copyright © 2001 Cronyx... - Page 40 Only DIP switches are used; remote control is disabled; NVRAM is not used A remote terminal is used; parameters are stored in NVRAM; DIP switches are not used Dual/MUX - Selection of E1XL flexible multiplexer operation mode two independent links multiplexer Web: www.cronyx.ru...
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