H3C Technologies H3C MSR 50 - Manual (Page 36)

2-16
Connecting the interface cable
When using an E1 cable outdoors, you are recommended to install a special lightning arrester on the
input end of the cable in order to avoid lightning more effectively.
If the SIC has been properly installed, follow these steps to connect the cable:
Step1 Connect the DB-15 connector of E1 cable to SIC-2E1-F;
Step2 Connect the other end of the E1 cable to the corresponding network device:
z
Connect the BNC connector of the cable to the remote equipment if there is no need for extension,
or
z
Connect the BNC connector of the cable to the coaxial connector and the other end of the coaxial
connector to the remote network equipment through a 75-ohm E1 trunk cable, if cable extension is
needed.
The wire marked TX in the E1 cable should be connected to the peer wire marked RX and the wire
marked RX should be connected to the peer wire marked TX.
Figure 2-15 Extend 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 120-ohm interface, use a 75-ohm-to-120-ohm adapter.
SIC-EPRI
Introduction
1-port channelized E1/CE1/PRI compatible interface module (SIC-EPRI) supports:
z
Transmission/Receiving and handling of E1 data streams;
z
CE1 (channelized E1) access;
z
ISDN PRI function;
z
Remote loopback and local loopback functions, facilitating fault test and location.