Cisco 2600 Series Operation Manual page 85

Table 8-1
LED
REMOTE ALARM
LOCAL ALARM
LOOPBACK
CARRIER DETECT
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.
1-Port and 2-Port Channelized T1/ISDN PRI with CSU Network Modules
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
Controller local loopback
Carrier received on telco link
Connecting ISDN PRI Network Modules to a Network 8-5