This variable indicates the line status of the interface. It contains loopback, failure, received alarm and transmitted alarms information.

The dsx1LineStatus is a bitmap represented as a sum; therefore, it can represent multiple failures (alarms) and a LoopbackState simultaneously.

dsx1NoAlarm must be set if and only if no other flag is set.

If the dsx1loopbackState bit is set, the loopback in effect can be determined from the dsx1loopbackConfig object. The various bit positions are as follows:

1 dsx1NoAlarm No alarm present 2 dsx1RcvFarEndLOF Far end LOF (a.k.a.

Yellow Alarm) 4 dsx1XmtFarEndLOF Near end sending LOF indication 8 dsx1RcvAIS Far end sending AIS 16 dsx1XmtAIS Near end sending AIS 32 dsx1LossOfFrame Near end LOF (a.k.a. Red Alarm) 64 dsx1LossOfSignal Near end Loss of Signal 128 dsx1LoopbackState Near end is looped 256 dsx1T16AIS E1 TS16 AIS 512 dsx1RcvFarEndLOMF Far end sending TS16 LOMF 1024 dsx1XmtFarEndLOMF Near end sending TS16 LOMF 2048 dsx1RcvTestCode Near end detects a test code 4096 dsx1OtherFailure Any line status not defined here 8192 dsx1UnavailSigState Near end in unavailable signal state 16384 dsx1NetEquipOOS Carrier equipment out of service 32768 dsx1RcvPayloadAIS DS2 payload AIS 65536 dsx1Ds2PerfThreshold DS2 performance threshold exceeded