3Com 3C13886 Installation Guide - Page 77
Table 3-20, Description, E1, CE1
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3Com Router Module Guide Chapter 3 Multifunctional Interface Modules Cable type E1 75-ohm non-balanced coaxial cable E1 120-ohm balanced twisted pair cable 120-ohm 4E1 conversion cable (4E1/4E1-F modules) 75-ohm 4E1 conversion cable (4E1/4E1-F modules) Coaxial connector, network interface connector and 75-ohm to 120-ohm adapter (with BNC connector) Operating mode E1, CE1, ISDN PRI (only supported by Router 2 and 4-Port CE1/PRI MIM) FE1 (only supported by ) Services supported 1) Backup 2) Terminal access service 3) ISDN PRI (only supported by Router 2 and 4-Port CE1/PRI MIM) 3.8.3 Interface LEDs The following figure illustrates a 2-port panel. Figure 3-38 2-port panel The following figure illustrates a 4-port module. Figure 3-39 4-port panel Description about the LEDs on E1/E1-F panels is given in the following table: Table 3-20 Description about the LEDs on E1/E1-F panels LED Description ON means the carrier signal has been received. LINK OFF means no carrier signal has been received. 3-33