
A-43
Chapter 1 Network Administration
Model 5399 Remote Access Concentrator Network Administrator’s Guide for UNIX
Book A
Table B-14. Fields in the stats –T Command Display
(continued on next page)
Field
Description
Alarm History
Displays the first alarm that occurred after a boot or a
stats -T clear command, preceded by the time at which
the alarm occurred.
Current Alarms
When NO SYNC is displayed, the
T1/PRI engine has lost frame synchronization and
enters the Red Alarm state. When nothing is displayed
for Sync, the T1/PRI engine is detecting frame
synchronization.
When LOSS OF SIGNAL is displayed, the T1/PRI
engine is not detecting pulses on the T1/PRI network
interface receiver. When LOSS OF SIGNAL is not
displayed, the T1/PRI network interface is receiving
pulses. The loss of signal condition causes the T1/PRI
engine to transmit AIS (all ones unframed) on the
network interface.
When BLUE is displayed, the T1/PRI engine is
receiving AIS (all ones unframed) from the network.
When BLUE is not displayed, the T1/PRI engine is not
receiving AIS.
When RED is displayed, the T1/PRI engine has
detected loss of frame synchronization. During this
condition, the T1/PRI interface is sending a Yellow
Alarm to the network. When RED is not displayed, the
T1/PRI engine is in frame synchronization.
When YELLOW is displayed, the T1/PRI engine is
receiving a Yellow Alarm from the network. When
YELLOW is not displayed, the T1 engine is not
receiving a Yellow Alarm from the network.