Cisco CISCO2650 - 2650 Router Hardware Installation Manual page 97

Chapter 4 Connecting Fast Ethernet-PRI Network Modules
Figure 4-12 Connecting a CE1/PRI-B Port to an E1 CSU (DB-15-to-RJ-45 Connectors)
FE-PR I
1FE-1 CE1-B /U
CE1/PRI-U Port
Use the appropriate cable to connect a CE1/PRI-U (75-ohm) port to an E1 CSU.
CSU with BNC connectors. These ports are color-coded tan.
Figure 4-13 Connecting a CE1/PRI-U Module to an E1 CSU (DB-15-to-BNC Connectors)
Setting Interfaces to Balanced or Unbalanced Termination
This section describes how to configure an E1 network module for balanced or unbalanced termination.
The module consists of two circuit boards, or cards. A terminal block and a set of five jumpers are
provided on each card to configure termination.
To avoid damaging electrostatic discharge (ESD)-sensitive components, observe all ESD
Caution
precautions when handling the circuit boards.
OL-2485-20
1-Port Fast Ethernet and 1- or 2-Port Channelized E1/ISDN PRI Balanced or Unbalanced Network Modules
CTRLR 0
CE1/PRI port (DB-15)
E1 cable for 120-ohm
balanced connections
with an RJ-45 connector
at the network end
FE-PR I
1FE-1 CE1-B /U
CTRLR 0
CE1/PRI-U
E1 cable for 75-ohm
unbalanced connections
with BNC connectors
at the network end
10/100B aseT
EN
RJ-45 jack
10/100B aseT
EN
BNC connectors
Figure 4-14
Cisco Network Modules Hardware Installation Guide
Figure 4-13
E1 CSU
shows these terminal blocks.
shows a
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