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T-1 Commands
CSMIM-T1 Hardware Installation Guide 4-3
The information displayed at the beginning of every stats -T command is
described in Table 4-3.
Table 4-3 stats-T Command Information
Field Description
Sync When Sync is true, the T-1 engine is detecting frame
synchronization. When Sync is false, the T-1 engine has lost
frame synchronization and enters the red alarm state.
Loss of Signal When Loss of Signal is true, the T-1 engine is not detecting
pulses on the T-1 network interface receiver. When Loss of
Signal is false, the T-1 network interface is receiving pulses.
The loss of signal condition causes the T-1 engine to transmit
AIS (all ones unframed) on the T-1 network interface.
Blue Alarm When the Blue Alarm is true, the T-1 engine is receiving AIS
(all ones unframed) from the network. When the Blue Alarm is
false, the T-1 engine is not receiving AIS. The Blue Alarm
event saved in the history buffer is also displayed.
Red Alarm When the Red Alarm is true, the T-1 engine has detected loss
of frame synchronization. During this condition, the T-1
interface is sending a Yellow Alarm to the network. When the
Red Alarm is false, The T-1 engine is in frame synchronization
and the sync indication is true. The Red Alarm event saved in
the history buffer is also displayed.
Yellow Alarm When the Yellow Alarm is true, the T-1 engine is receiving a
Yellow Alarm from the network. When the Yellow Alarm is
false, the T-1 engine is not receiving a Yellow Alarm from the
network. The Yellow Alarm event saved in the history buffer is
also displayed.
Loopback The loopback status has the following possible states:
None - There is no loopback in progress. The test LED on the
front panel is not illuminated.
Local - The T-1 network interface is in local loopback. The test
LED on the front panel is illuminated.
Line - The T-1 network interface is in line loopback. The test
LED on the front panel is illuminated.
Payload - This means that the T-1 network interface is in
payload loopback. The test LED on the front panel is
illuminated.