3Com 3C13886 Installation Guide - Page 154

3Com Router Module Guide Chapter 4 4.12.3 Panel and Interface LEDs The following figures illustrate the ROUTER 4-PORT E1 IMA FIC (75-ohm) panels: Figure 4-42 75-ohm ROUTER 4-PORT E1 IMA FIC panel Figure 4-43 75-ohm panel The following table describes the LEDs on ROUTER 4-PORT E1 IMA FIC panels: Table 4-28 LEDs on ROUTER 4-PORT E1 IMA FIC panels LED Description LINK OFF means no link is present; ON means a link is present. OFF means no data is being transmitted or received; blinking means data is ACT being received and/or transmitted. 4.12.4 Interface Cable The ROUTER 4-PORT E1 IMA FIC card provides four E1 ports and adopts a 120-ohm or a 75-ohm 4E1 conversion cable. The two types of cables look similar. Both of them have a DB-68 connector at one end for connecting the router. At the other end, however, the 75-ohm 4E1 conversion cable provides eight coaxial cable connectors; and the 120-ohm 4E1 conversion cable provides four twisted pair cable connectors. The card provides eight E1 ports and adopts a 120-ohm or a 75-ohm 8E1 conversion cable. The two types of 8E1 conversion cables are similar to the two types of 4E1 conversion cables except that the 75-ohm 8E1 conversion cable provides 16 coaxial cable connectors and the 120-ohm 8E1 conversion cable provides eight twisted pair cable connectors, as shown in the following figures: 4-45