Troubleshooting guide

MX2820 System Manual
8-18 61186003L1-1D
STS-1 DS1 Alarm Condition Descriptions
Table 8-14 provides information for DS1 alarms.
Table 8-14. STS-1 MUX DS1 Alarms
DS1 Alarm Description Severity Level
LOS This alarm indicates a DS1 Loss-of-Signal (LOS) on an
enabled line.
Major
XCV This alarm indicates the unit is receiving excessive code
violations from the loop (low-speed), exceeding the
threshold set by the XCV threshold parameter.
Alert
LOOP AIS This alarm indicates that all ones are being received on a
DS1 from the loop (low-speed) direction.
Alert
CARRIER AIS This alarm indicates that all ones are being received on a
DS1 channel from the network (high-speed) direction.
Alert
TEST The T1/E1 interface has been placed into a test (loop-
back) mode.
Alert