Connecting ISDN PRI Network Modules to a Network 8-5
1-Port and 2-Port Channelized T1/ISDN PRI with CSU Network Modules
1-Port and 2-Port Channelized T1/ISDN PRI with CSU
Network Modules
This section provides information about the following network modules for Cisco modular
routers:
• 1-port channelized T1/ISDN PRI with CSU network module—(Cisco product number
NM-1CT1-CSU or CPANM-1CT1-CSU). (See Figure 8-6.) This module is also
referred to as the 1-port CT1/PRI CSU network module.
• 2-port channelized T1/ISDN PRI with CSU network module—(Cisco product number
NM-2CT1-CSU or CPANM-2CT1-CSU). (See Figure 8-7.) This module is also
referred to as the 2-port CT1/PRI CSU network module.
Table 8-1 ISDN PRI Network Module LEDs
LED Meaning
REMOTE ALARM Local alarm at remote end of connection
LOCAL ALARM Loss of signal, loss of frame, or unavailability
because of excessive errors
LOOPBACK Controller local loopback
CARRIER DETECT Carrier received on telco link
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