3Com 3C13886 Installation Guide - Page 131
II. Interface cable of the ROUTER 4-PORT CE1/PRI FIC,
UPC - 662705478456
View all 3Com 3C13886 manuals
Add to My Manuals
Save this manual to your list of manuals |
Page 131 highlights
3Com Router Module Guide Chapter 4 Note: To extend an E1 75-ohm unbalanced coaxial cable, you can select a pair of coaxial connectors with a BNC receptacle at each end to connect the BNC receptacles of the cable each to a 75-ohm unbalanced coaxial cable with BNC connectors. z 120-ohm balanced twisted-pair cable As shown in the following figure, at the router end of the cable is a DB-15 plug and at the network end is an RJ-45 connector. Figure 4-22 E1 120-ohm balanced twisted-pair cable Note: To extend an E1 120-ohm balanced twisted-pair cable, you can select a network connector with an RJ-45 receptacle at each end to connect the cable to another 120-ohm balanced twisted-pair cable. In addition, you are available with 75-ohm-to-120-ohm adapters. Note: E1 cable, coaxial connector, network connector, and 75-ohm-to-120-ohm adapter are all optional accessories. They are provided only when ordered. II. Interface cable of the ROUTER 4-PORT CE1/PRI FIC ROUTER 4-PORT CE1/PRI FIC provides two types of 1-to-4 adapter cables: 120-ohm 4E1 and 75-ohm 4E1. At one end of both cables is a DB-25 connector for connecting the router, and at the other end are four DB-15 connectors for connecting E1 cables. You can distinguish between them by the main label text: "4E1-120Ohm-CAB" for the 120-ohm 4E1 adapter cable and "4E1-75Ohm-CAB" for the 75-ohm 4E1 adapter cable. 4-22