Cisco CISCO2650 - 2650 Router Hardware Installation Manual page 137

Chapter 7 Connecting ISDN PRI Network Modules
Connecting CE1/PRI-U Modules to the Network
To connect a CE1/PRI-U (75-ohm) module to the network, use the appropriate cable to connect the
CE1/PRI-U port to an E1 CSU (see
a CSU with BNC connectors.
Figure 7-18 Connecting a CE1/PRI-U Module to an E1 CSU
PRI Module LEDs
All network modules have an enable (EN) LED. This LED indicates that the module has passed its
self-tests and is available to the router.
All PRI modules display four additional LEDs for each port. These LEDs are described in
Table 7-4
LED
RA
LA
LP
CD
OL-2485-20
(DB-15-to-BNC Connectors)
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
ISDN PRI Network Module LEDs
Meaning
Local alarm at remote end of connection
Loss of signal, loss of frame, or unavailability because of
excessive errors
Loopback mode
Carrier received on telco link
Figure 7-18). These ports are color-coded tan. The illustration shows
10/100B aseT
EN
BNC connectors
Cisco Network Modules Hardware Installation Guide
PRI Module LEDs
E1 CSU
Table 7-4.
7-13