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Modem-converter E1-L/R
(for Rack 19" 3U10)


Modem E1-L/R

  • ITU-T G.703, G.704, G.706 and G.823 compliant
  • Up to 2 km
  • CAS and CRC4 multiframing
  • V.35/RS-530/RS-449/RS-232 user data interface
  • Full duplex synchronous mode
  • Selectable data rates
  • Digital port loopback, local and remote link loopbacks
  • Integrated BER tester
  • Supervisory (console) RS-232 port
  • Construction: PCB for 3U high rack for 19 inch cabinet
  • Certificate

The E1-L/R is a fractional E1 access device, for transmitting digital data over framed (ITU-T G.704) E1 channels. Digital data port rates are selectable for any multiple of 64 kbps up to 1984 kbps. User data occupies only the required number of E1 frame timeslots reducing billing to only bandwidth used. E1-L/R also supports unframed E1 channels.

The E1-L/R is available in PCB for 3U high Cronyx Rack for 19 inch cabinet.

E1-L/R device may be ordered with multistandard interface. The multistandard interface is cable-switchable to RS-232, RS-530, RS-449 or V.35 standards.

Device operation may be controlled via console port (RS-232 port for supervisory terminal connection).

The E1-L/R device may be configured by DIP switches or from console.
Link testing and loopback control may be performed both from console and from front panel.

Currently available models are listed in Prices. Please, contact technical support if you are unsure which model to choose.


E1 Interface
Line Code) HDB3
Line Impedance) 120 Ohm (twisted pair) or 75 Ohm (coax cable), jumper selectable
Receive Signal Attenuation Range) from 0 to -30 dB
Jitter Attenuator On receive, up to 120UIpp attenuation
Frame Structure In acc. to ITU-T G.704. Unframed mode available
Multiframing CRC4, CAS
Frequency Offsets Adjustment Controlled slip buffers in receive path
Connector Type) Removable terminal board
Digital Interface
Data Rate up to 1984 kbps (framed Nx64 kbps),
or up to 2048 kbps (unframed)
Clock Signals Supported TXC, RXC, ETC, ERC
Modem Control Signals DTR, DSR, CTS, RTS, CD
Connector Type (multistandard interface) HDB44 (female)
Connector Type (V.35 interface) M-34 (female)
Console Port
Interface Type RS-232 DCE
Serial Protocol Asynchronous 9600 bps, 8 bits/character, 1 stop bit, no parity
Connector Type DB9 (female), 9 pins
Loopbacks Local and remote link loops, digital port loop, activated from console and by front panel switch
BER Tester Activated from console and by front panel switch
Temperature 0 to 50 °ะก
Relative Humidity 0 to 80 %, non-condensing


Some of the documents are in Adobe® Acrobat® Reader® format

PDF  E1-L/R. User's Manual in Russian
PDF  Cronyx interface cables guide

Return to G.703 Interface Converters or Digital Communication Equipment

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