TCAS Connections

From Zenitel Wiki

AlphaCom icon 300px.png
TCAS substation - Rear side

This article describes connection details of the analog intercoms TCAS-1, TCAS-2 and TCAS-3.


The cabling from the AlphaCom server to the intercom station is star wiring. Two twisted pairs of wires are required. The maximum distance depends on the cable diameter:

  • 0.5 mm wires: 1.4 km
  • 0.6 mm wires: 2.0 km
  • 0.9 mm wires: 4.0 km

The station line can be connected in to ways:

  • By means of an RJ45 connector at the rear side of the station, or
  • By using the plugable screw connector

Connection using the RJ45 connector:


Note icon The station cable is not a 1:1 cable!

For details on connection at the AlphaCom server side, see ASLT - AlphaCom Subscriber Line Board

Second Call Button

The station is prepared for a second external call button (DAK 2). The button can be connected between the A-wire and the lower leg on D6 on the print (highlighted in the image above).

TCAS Connections 2.PNG