3Com 3C13755-US - Router 5642 Installation Manual page 44

42 C 3: I
HAPTER NTRODUCING
R 5000 F MIM
OUTER AMILY S
If the remote network device has a 120-ohm interface, you should use 75-ohm to
120-ohm converter, or use a 120-ohm cable instead.
5 Power on the router.
6 Check the status of the corresponding READY LED on the panel. If the LED is on,
the router has completed the POST and is operating normally. If the LED is off, the
POST failed and you should contact your Service representative.
7 Check the status of the LINK LED (synchronous LED) on the panel of the 2-port
E1/CE1/PRI MIM. If the light is off, signal synchronization failed and you should
check the line.
The E1 cable, coaxial connector, network interface connector, and 75-ohm to
120-ohm adapter are all optional accessories so you must make these selections
when you purchase 2-port E1/CE1/PRI MIMs.
Connecting the 120-ohm Balanced Twisted Pair Cable
The 120-ohm balanced twisted pair cable is shown in Figure 44.
Figure 44 E1-120-ohm Balanced Twisted Pair Cable
Enlarged A side
You can select a network interface connectors with a RJ-45 receptacle at both
ends that connect two 120-ohm balanced twisted pair cables with BNC
connectors. The network interface connector is used in the extension connection
with E1 120-ohm balanced twisted pair cables.
To connect the 120-ohm balanced twisted pair cable:
1 Power off the router.
2 Check the type of E1 cable, and set the DIP switches of the 2-port E1/CE1/PRI MIM
correctly.
3 Plug the DB-15 connector of E1 cable into the E1 interface of the module.
4 Connect the other end of E1 cable to the corresponding network device:
If you do not need to extend the E1 cable, connect the RJ-45 connector of the
120-ohm balanced twisted pair cable directly to the RJ-45 interface of the remote
device.
If you need to extend the E1 cable, connect the RJ-45 connector of the 120-ohm
balanced twisted pair cable to a network interface connector, then connect the
other end of the network interface connector to the remote network device using
a 120-ohm E1 trunk cable. See Figure 45.
DB15
RJ-45
Enlarged B side