Huawei Quidway AR 28 Series Installation Manual page 61

Quidway AR 28 Series Routers Installation Manual
Attribute
Matching cable
Operating mode
Service
2) E1 interface cable
E1 interface cable, which is G.703-compatible, may be 75-ohm unbalanced coax cable
or 120-ohm balanced twisted pair cable. 75-ohm
75-ohm unbalanced coax cable
The cable is attached with DB-15 (male) connector for the router end, and with BNC
connector for the network end. See the following figure.
Figure 4-26 E1 75-ohm unbalanced coaxial cable
Note:
You can also choose to attach both ends with BNC connectors, for extending two
75-ohm unbalanced coaxial cables.
120-ohm balanced twisted pair cable
The cable is attached with DB-15 (male) connector for the router end, and with RJ-45
connector for the network end. See the following figure.
E1 75-ohm unbalanced coaxial cable
E1 120-ohm balanced coaxial cable
Coaxial connector,
75–120-ohm adapter (with BNC connector)
E1, CE1, ISDN PRI
Backup
Terminal access
ISDN PRI
Huawei Technologies Proprietary
4-21
Chapter 4 Installation of the Router
Description
network interface connector,