Huawei Quidway AR 28 Series - Page 61

Quidway AR 28 Series Routers Installation Manual Chapter 4 Installation of the Route
r
Huawei Technologies Proprietary
4-21
Attribute Description
Matching cable
E1 75-ohm unbalanced coaxial cable
E1 120-ohm balanced coaxial cable
Coaxial connector, network interface connector,
75–120-ohm adapter (with BNC connector)
Operating mode E1, CE1, ISDN PRI
Service
Backup
Terminal access
ISDN PRI
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
z 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.
z 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.