Cisco EF4116 - Figure 4-15 Channelized T1 Network Interface Processor; CT1 Network Processor Module LED Indicators

4-12 Cisco 4000 Series Hardware Installation and Maintenance
Reading Network Processor Module LED Indicators
CT1 Network Processor Module LED Indicators
The three LEDs on the CT1 network processor module are labeled loopback, local alarm, and remote
alarm. (See Figure 4-15.)
Figure 4-15 Channelized T1 Network Interface Processor
The three LEDs on the CT1 front panel indicate the following:
• Loopback—Indicates controller local loopback.
• Local alarm—Indicates a loss of signal, a loss of frame, or unavailability because of excessive
errors.
• Remote alarm—Indicates a remote alarm is received from the remote end because of a local
alarm at the remote end.
H3155
cT1/ PRI
LOOPBACK LOCAL ALARM REMOTE ALARM
DB-15
female