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1-Port and 2-Port ISDN-PRI Network Module Configuration Note 9
Connecting the PRI Module to the Network
CT1/PRI-CSU Modules
To connect a CT1/PRI-CSU module, use a straight-through RJ-48C-to-RJ-48C cable to connect the
RJ-48C port to an RJ-48C jack. (See Figure 9.)
Figure 9
Connecting a CT1/PRI-CSU Module to an RJ-48C Jack
CE1/PRI-B Modules
To connect a CE1/PRI-B (120-ohm) module, use the appropriate cable to connect the CE1/PRI-B
port to an E1 CSU. (See Figure 10, Figure 11, and Figure 12, showing DB-15, Twinax, and RJ-45
CSUs respectively.)
Figure 10
Connecting a 120-Ohm CE1/PRI-B Module to an E1 CSU (DB-15-to-DB-15 Connectors)
H7469
RJ-48C jack
CT1/PRI-CSU
port (RJ-48C)
LOOPBACK
EN
cT1
CSU
LOCAL
ALARM
REMOTE
ALARM
CARRIER
DETECT
RX
OUT
RX
MON
CTRLR 0
TX
IN
LOOPBACK
CTRLR 0
EN
cE1-B
PRI
H7470
LOCAL
ALARM
REMOTE
ALARM
CARRIER
DETECT
CE1/PRI-B (DB-15)
DB-15 connector
E1 CSU
E1 cable for 120-ohm
balanced connections
with a DB-15 connector
at the network end