|
Section alarms
|
|
LOS
|
Loss of signal - not enough Rx power or fiber disconnected.
|
LOF
|
Loss of frame - unable to frame the signal correctly, possibly due to improper timing setup.
|
Line Alarms
|
|
L-AIS
|
Alarm Indication Signal - sent out when a port is disabled or indicates another line failure.
|
L-RDI
|
Remote Defect Indication - the result of a L-AIS or LOS/LOF at the remote end.
|
Path Alarms
|
|
P-AIS
|
Path Alarm Indication Signal - indicates a propagation upstream of a downstream L-AIS alarm or another path failure.
|
P-LOP
|
Path Loss of Pointer - the pointer to the Sonet SPE is not correct; sometimes due to dirty fiber, or timing slips.
|
P-RDI
|
Path Remote Indicator - the result of a P-AIS alarm at the remote end.
|
P-SLM
|
Path Signal Label Mismatch - path labels do not match, in particular the C2 label is mismatched. (The C2 label is used to indicate scrambling according to RFC 2615.)
|
P-UNEQ
|
Path is unequipped - the path is may not be provisioned to handle traffic cross-connects.
|
