H3C Technologies H3C MSR 50 - Manual (Page 34)

2-14
Figure 2-12 Extending an E1 75-ohm unbalanced coaxial cable
Router
Network
devices
such as DDN
DB-15
Coaxial connector
BNC BNC
75-ohm non-balanced coaxial cable
75-ohm E1 trunk cable
If the remote device has a 120-ohm interface, use a 75-ohm-to-120-ohm adapter.
SIC-2E1-F
Introduction
2-port fractional E1 interface module (SIC-2E1-F), where F indicates fractional. The SIC-2E1-F
supports:
z
Transmission/Receiving and handling of E1 data streams;
z
CE1 (channelized E1) access;
z
Remote loopback and local loopback functions, facilitating fault test and location.
Interface attributes
The interface attributes of SIC-2E1-F are given in the following table:
Table 2-13 Interface attributes of SIC-2E1-F
Attribute Description
Connector type DB-15
Number of connectors 1
Interface standard G.703, G.704
Interface rate 2.048 Mbps
Cable type 75-ohm unbalanced coaxial cable (DB-15 to BNC)
Operating modes
E1
CE1
Supported services
Backup
Terminal access
Interface LEDs
SIC-2E1-F panel is shown in the following figure: