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General information

• Interconnection with digital PBX via V5 interface over one or two E1 line links organized over symmetrical copper cable pairs in accordance with G.703, G.704, G.706 ITU-T.

• Two options of subscriber port types: PSTN with standard two-wires telephone channels parameters and ISDN port, providing interconnection of the unit with ISDN modem via U-interface over two-wires channel.

• Interconnection of the unit with subscriber modem via two-wires ISDN channels with basic access 2B+D.

• Concentration of two-wires telephone channels (using PSTN ports) and/or 64 kb/s (B-channels) using ISDN ports.

• Possibility of remote power supply of subscriber ISDN-modem with voltage from 95 to 110 V.

• Protection of line and subscriber terminations against lightning and industrial over voltages.

• Amount of PSTN ports assigned can be up to 128, ISDN ports – up to 20.

• Maximum communications distance for ISDN ports is 5,0 km using TPP-0,4 cable and 6,9 rm using TPP-0,5 cable.

• Maximum length of line links for E1 transmission is from 2 to 8 km, dependent of cable type.

• Power supply from mains 220 VAC or from station battery 48/60 V

• Support of network monitoring system.

• Construction is 3U high cassette for installation into 19” “euro” cabinet.

 

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K-128 unit

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