MX2820 System Manual8-18 61186003L1-1DSTS-1 DS1 Alarm Condition DescriptionsTable 8-14 provides information for DS1 alarms.Table 8-14. STS-1 MUX DS1 AlarmsDS1 Alarm Description Severity LevelLOS This alarm indicates a DS1 Loss-of-Signal (LOS) on anenabled line.MajorXCV This alarm indicates the unit is receiving excessive codeviolations from the loop (low-speed), exceeding thethreshold set by the XCV threshold parameter.AlertLOOP AIS This alarm indicates that all ones are being received on aDS1 from the loop (low-speed) direction.AlertCARRIER AIS This alarm indicates that all ones are being received on aDS1 channel from the network (high-speed) direction.AlertTEST The T1/E1 interface has been placed into a test (loop-back) mode.Alert
