3Com Router Module Guide
Chapter 2 Smart Interface Cards
2-9
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;
Step 4: Check the status of LINK LED on the ROUTER 1-PORT SERIAL SIC panel:
ON means the link is connected and OFF means the link is not connected. In the latter
case, check the line.
2.3 ROUTER 2-PORT ISDN-S/T SIC and ROUTER 2-PORT
ISDN-U SIC
2.3.1 Introduction
1/2-port ISDN BRI S/T interface cards (ROUTER 2-PORT ISDN-S/T SIC) serve to
transmit/receive and handle one and two channels of ISDN BRI S/T data streams.
1/2-port ISDN BRI U interface cards (ROUTER 2-PORT ISDN-U SIC) server to
transmit/receive and handle one and two channels of ISDN BRI U data streams.
Both ROUTER 2-PORT ISDN-S/T SIC and ROUTER 2-PORT ISDN-U SIC have two
types of operating modes: dial-up and leased line.
2.3.2 Appearance
ROUTER 2-PORT ISDN-S/T SIC
and ROUTER 2-PORT ISDN-U SIC are shown in the
following figures:
Figure 2-9
ROUTER 2-PORT ISDN-S/T SIC
