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10 1-Port and 2-Port ISDN-PRI Network Module Configuration Note
Connecting the PRI Module to the Network
Figure 11
Connecting a 120-Ohm CE1/PRI-B Module to an E1 CSU (DB-15-to-Twinax Connectors)
Figure 12
Connecting a 120-Ohm CE1/PRI-B Module to an E1 CSU (DB-15-to-RJ-45 Connectors)
CE1/PRI-U Modules
To connect a CE1/PRI-U (75-ohm) module, use the appropriate cable to connect the CE1/PRI-U port
to an E1 CSU. (See Figure 13.) The illustration shows a CSU with BNC connectors.
LOOPBACK
CTRLR 0
EN
cE1-B
PRI
H7473
LOCAL
ALARM
REMOTE
ALARM
CARRIER
DETECT
CE1/PRI port (DB-15)
Twinax connectors
E1 CSU
E1 cable for 75-ohm
balanced connections
with twinax connectors
at the network end
LOOPBACK
CTRLR 0
EN
cE1-B
PRI
H7472
LOCAL
ALARM
REMOTE
ALARM
CARRIER
DETECT
CE1/PRI port (DB-15)
RJ-45 jack
E1 cable for 120-ohm
balanced connections
with an RJ-45 connector
at the network end