ADTRAN 4200659L1 - Manual (Page 74)

Chapter 3. Configuration
3-28 MX2800 STS-1 User Manual 61200659L1-1
STS-1 Standby Alarm Traps
Trap If enabled, the unit issues a trap when...
LOS (Loss of Signal)
The controller card has lost the network receive
signal.
LOF (Loss of Framing)
The controller card detects a loss of framing
from the network.
LOMF (Loss of Multiframe)
The controller card detects loss of H4
multiframe from the network.
AIS-L (Line Alarm Indication Signal)
The controller card is receiving a line alarm
indication signal. Line AIS defect is detected as
a "111" pattern in bits 6, 7, and 8 of the K2 byte
in five consecutive frames.
AIS-P (Path Alarm Indication Signal)
The controller card 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.