3Com Router 5000 and Router 6000 v2.41
Module Guide Chapter 2 Smart Interface Cards
2-25
2.6.6 Connecting Interface Cable
Caution:
z You should connect a cable to the port with the correct mark. Misplugging is prone to impair the
SIC/MIM and even damage the router.
z You are recommended to install a special lightning arrester on the input end of the telephone line in
order to avoid the lightning effects more efficiently.
If the SIC has been properly installed, follow these steps to connect the cable:
Step 1: Insert the end with ferrite core into one LINE port of Router 1-Port Analog
Modem SIC;
Step 2: Plug the other end of the cable into the telephone wall jack;
Step 3: Power on the Router, and check the LEDs of the corresponding slot on the
front panel: ON means that the SIC is operating normally and OFF means that the
POST of the SIC has failed. In the latter case, please contact your agent.
2.7.1 Introduction
1/2-port voice subscriber circuit interface card (Router 1 or 2-Port FXS SIC) and
1/2-port voice AT0 analog trunk interface card (Router 1 or 2-Port FXO SIC) serve to
access and handle 1/2 channel(s) of analog voice signals over data communication
networks. The differences between FXS SIC and FXO SIC are listed below:
z FXS SIC cards are analog subscriber line cards that provide ordinary analog
telephone and fax access and also can connect AT0 loop trunks of exchanges;
z FXO SIC cards are loop trunk cards that provide access of common subscriber
lines of exchanges.