3Com 3C13886 Installation Guide - Page 24
ROUTER 2-PORT ISDN-S/T SIC and ROUTER 2-PORT, ISDN-U SIC, Introduction, Appearance
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3Com Router Module Guide Chapter 2 Smart Interface Cards 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 2-9