Chapter 3. Configuration3-28 MX2800 STS-1 User Manual 61200659L1-1STS-1 Standby Alarm TrapsTrap If enabled, the unit issues a trap when...LOS (Loss of Signal)The controller card has lost the network receivesignal.LOF (Loss of Framing)The controller card detects a loss of framingfrom the network.LOMF (Loss of Multiframe)The controller card detects loss of H4multiframe from the network.AIS-L (Line Alarm Indication Signal)The controller card is receiving a line alarmindication signal. Line AIS defect is detected asa "111" pattern in bits 6, 7, and 8 of the K2 bytein five consecutive frames.AIS-P (Path Alarm Indication Signal)The controller card is receiving a path alarmindication signal. AIS-P is defined as all ones inbytes H1, H2, and H3 as well as all ones in theentire STS synchronous payload envelope.
