Discontinued, recommended replacement is: Tau-PCI/2E1

Specifications
Documentation

Features: Up to 2.5 km Two G.703 2.048 Mbps line interfaces Extra V.35/RS-530/RS-449/RS-232 data interfaces Full duplex synchronous mode Selectable data rates Local and line loopbacks Internal modem for PCI bus Certificate N OS/1-SPD-19 of Russian Ministry of Communications

The Tau-PCI-G.703 is an adapter board for IBM PC and compatible computers with PCI bus. It incorporates two G.703 short range modems and two optional digital interfaces. The short range modems operate at distances of up to 2.5 km

There are several models of Tau-PCI-G.703 modem that differ by type of digital interface.

Specifications

PC Bus Interface
Bus Type	PCI, 33 MHz/32 bit
Serial Interfaces
Data Transfer Rate per direction for each channel simultaneous operation	10 Mbps
Bit Rate Generator	Independent per channel
Synchronous Protocol	HDLC
Error Detection	Cyclic Redundancy Check CRC-16, CRC-CCITT
Clock Options	TXCIN, RXCIN, TXCOUT or DPLL, Software selectable per channel
Modem Control Signals	DTR, DSR, CTS, RTS, CD
G.703 Interfaces (2048 kbps)
Data Transfer Rate	64, 128, 256, 512, 1024 and 2048 kbps, Software selectable per channel
Line Code	AMI or HDB3, Software selectable per channel
Line Impedance	120 Ohm (Twisted Pair) or 75 Ohm (Coax Cable), Jumpers selectable per channel
Receive Signal Attenuation Range	from 0 to -43 dB (up to 2.6 km of 22 AWG twisted-pair cable)
Line Attenuation Monitoring	4 Levels: 0 dB, -9.5 dB, -19.5 dB, -28.5 dB
Jitter Attenuator	32 bits depth, in the receive path
Error Detection	Bipolar Violation
Board Size	Height: 100 mm, Width: 167 mm
Operating Systems and Protocols
Linux	PPP, Cisco/HDLC, Frame Relay
FreeBSD 4.x, 5.x, 6.x (FreeBSD 7.x is not supported)	PPP, Cisco/HDLC, Frame Relay

Documentation

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  User's Manual in Russian
  User's Manual in English
  Driver Development Kit Manual in Russian
  V.35 cable scheme
  RS-232 cable scheme
 Справочник по интерфейсным кабелям Cronyx.

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