3Com 3C13701 Module Manual page 36

3Com Router 5000 and Router 6000 v2.41
Module Guide
Caution:
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.
Router
75-ohm non-balanced coaxial cable
Figure 2-18 Extending an E1 75-ohm non-balanced coaxial cable
If the remote device has 120-ohm interface, it is needed to use a 75-ohm-to-120-ohm
adapter or use a 120-ohm cable.
2) When the E1 cable is a 120-ohm balanced twisted pair cable:
Directly connect the RJ45 connector of the cable to the RJ45 port of the remote
equipment, if there is no need to extend the E1 cable, or
Connect the RJ45 connector of the cable to the network connector and the other
end of the network connector to the network equipment through a 120-ohm E1
trunk cable, if cable extension is needed.
Router
120-ohm balanced twisted pair
Figure 2-19 Extending an E1 120-ohm balanced twisted pair cable
Step 4: Power on the Router, and check the LEDs of the corresponding slot on the
front panel: ON means that the SIC is operating normally and OFF means that the
Power-On Self-Test (POST) of the SIC has failed. In the latter case, please contact
your agent;
DB-15
BNC
Coaxial connector
DB-15
RJ-45
Network interface connector
Chapter 2 Smart Interface Cards
BNC
75-ohm E1 trunk cable
Network
RJ-45
devices such
as DDN
120-ohm E1 trunk cable
2-19
Network
devices
such as DDN