ADTRAN 4200659L7, 4200659L1, 4175043L2, 4200659L5, 4200659L8, 4200659L2 STS-1 Alarms, Description

Chapter 3. Configuration

STS-1 Alarms

Alarm	Description
LOS	(Loss of Signal)
	The unit has lost the network receive signal.
LOF	(Loss of Framing)
	The unit detects a framing loss from the
	network.
LOP	(Loss of Pointer)
	The unit is unable to detect a valid pointer in the
	receive signal.
LOMF	(Loss of Multiframe)
	The unit detects loss of H4 multiframe from the
	network.
AIS-L	(Line Alarm Indication Signal)
	The unit is receiving a line alarm indication
	signal. The Section Terminating Equipment
	generates AIS-L after detecting LOS or LOF.
AIS-P	(Path Alarm Indication Signal)
	The unit is receiving a path alarm indication
	signal. AIS-P is defined as all ones in bytes H1,
	H2, and H3 as well as all ones in the entire STS
	synchronous payload envelope.
RFI-L	(Line Remote Failure Indication)
	The unit is receiving a line remote failure
	indication. RFI-L is declared when the incoming
	line remote defect indication (RDI-L, “110”
	pattern in bits 6, 7, and 8 of the K2 line overhead
	byte) lasts for 2.5 +/- 0.5 seconds.
RFI-P	(Path Remote Failure Indication)
	The unit is receiving a path remote failure
	indication. RFI-P is declared when the incoming
	path remote defect indication (RDI-P, “1” in bit 5
	of the G1 path overhead byte for contiguous
	frames) lasts for 2.5 +/- 0.5 seconds.

61200659L1-1 MX2800 STS-1 User Manual 3-19