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Multiplexer - Voice Transcoder E1-XLC


Multiplexer - Voice Transcoder E1-XLC Features:
  • Two E1 ports
  • Synchronous interface V.35/RS-530/RS-449/RS-232 or Ethernet
  • ITU G.703, G.704, G.706 and G.823 compliant
  • Up to 1.5 km
  • Transparent for signaling
  • CRC4 framing
  • 14 ADPCM codes supported
  • Clock sources: Internal oscillator, E1 receiver or synchronous port
  • Asynchronous mode for RS-232 interface
  • Digital and line loopbacks
  • Integrated HDLC buffer
  • Integrated BER tester
  • Supervisory RS-232 port
  • Dry contacts alarm interface
  • AC or DC power
  • Upgradeable firmware
  • Certificate N OS-2-SP-1638

The E1-XLC device has two E1 ports (link 0 and link 1) and a digital port (serial or Ethernet). E1 stream from link 1, containing 64 kbit/s PCM coded voice timeslots, is encoded to 16, 24, 32, or 40 kbit/s ADPCM data of link 0. The rest of band is used for transmission of data from digital port. E1-XLC device is transparent to signaling. The ADPCM coding type is selectable from 14 possible variants.

The device is available as a stand-alone desk-top unit and can be AC (220V) or DC (60V) powered.

The digital port can be equipped with V.35, RS-530, RS-232 or X.21 interface with the standard connectors, or multi-standard digital interface. The multi-standard interface is switchable by adapter cable to RS-232, RS-530, RS-449 or V.35 standards.

The device setup is performed by microswitches or via the RS-232 supervisory port. All diagnostics options are controlled from the front panel or the supervisory port.

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


ADPCM Transcoder
Supported Codes G.726 (16 kbps, 24 kbps, 32 kbps, 40 kbps),
G.727 (Embedded Codes),
G.721-1984 (16-level, 32 kbps),
Tellabs 24 kbps,
Alternate (4-level, 16 kbps),
Alternate (3-level, 16 kbps),
Conexant (data optimized, 32 kbps)
Digital Interface
Data Transfer Rate 24-1984 kbps (Nx8 kbps)
Clock Options Supported TXC, RXC, ETC, ERC
Modem Control Signals DTR, DSR, CTS, RTS, CD
E1 Interfaces
Line Code HDB3
Line Impedance 120 Ohm (Twisted Pair) or 75 Ohm (Coax Cable), Switches selectable
Receive Signal Attenuation Range from 0 to 30 dB (up to 1.5 km of 22 AWG twisted-pair cable)
Jitter Attenuator In either the receive or the transmit path, programmable for 120UIpp attenuation
Frame Structure per G.704
Multiframes CRC4
Frequency Offsets Adjustment Controlled Frame Slip
Alarm Interface
Connector Type 6-pins Mini DIN (female)
Relay Contact Current up to 250 ma
Relay Contact Voltage up to 175 VDC
Supervisory Port
Interface Type RS-232
Serial Protocol asynchronous 9600 bps, 8N1
Connector DB-9 (female)
Loopbacks Digital and Line Loops, activated by front panel switch or via supervisory port
BER Tester Activated by front panel switch or via supervisory port


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

PDF  User's Manual in Russian
PDF  User's Manual in English

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