3Com Router Module Guide
Chapter 4
4-53
ACT
OFF means the channel is idle and ON means there is call activity.
4.15.4 Interface Cable
The external interfaces of the ROUTER 2-PORT FXS/2-PORT FXO FIC and the
ROUTER 4-PORT FXS/4-PORT FXO FIC are standard RJ-45 connectors.
The interface cables for the cards are telephone cables with ferrite core, both ends of
which are RJ-11 connectors.
Note:
RJ-45 receptacles on the FXO/FXS cards also accept RJ-11 connectors.
The standard equipping package for the ROUTER 2-PORT FXS/2-PORT FXO FIC
and the ROUTER 4-PORT FXS/4-PORT FXO FIC includes the regular telephone
cables.
4.15.5 Connecting the Interface Cable
Caution:
If outdoor cabling is involved, consider to install a special lightning arrester at the input
end of the interface cable for better lightning protection.
Before you connect a port, read its label carefully; a wrong connection can cause
damages to the interface card and even the device.
In connecting an interface cable, note to connect the end with ferrite core to the router
for EMC sake.
Step 1: Insert the ferrite core end of the cable into the to-be-connected RJ-45 port on
the interface card.
Step 2: Connect the other end of the cable as follows:
z
For a card, connect to a phone-set, fax or AT0 loop trunk of telephone exchange.
z
For a connect to a regular subscriber line of telephone exchange.
