Comtrol VS3000S - Manual (Page 23)

ISDN Cable Specifications 23
Building Cables
This section contains information on how to build VS3000 cables.
Note: ISDN and Ethernet cables may appear to be identical, but they
are not interchangeable. Ethernet cables may in some cases
work in place of ISDN cables, but ISDN cables will not work for
Ethernet. Depending on the model of VS3000 you purchase, you
may receive one or more ISDN cables with the unit. DO NOT
attempt to use one of these cables as an Ethernet cable.
ISDN Cable Specifications
If building your own ISDN cables, make sure that you use Category 3
(or better), unshielded twisted-pair cable.
ISDN (Port) Connector Pinouts
Use the following table and figures for pinout information for the RJ45
connectors on the VS3000.
Table 8. ISDN Port RJ45 Connector Pinouts
Pins VS3000U VS3000S NT1 Signals
1 and 2 Not Used Not Used Not Used
3 Not Used Tx+ Rx+
4 U Connection Rx+ Tx+
5 U Connection Rx- Tx-
6 Not Used Tx- Rx-
7 and 8 Not Used Not Used Not Used
Pin 1
1 8
Plug
Top View
Cable
Pin 1
Receptacle