EXFO IQS-8100 Series Transport Blazer for IQS-600 - Manual (Page 177)

OTN Tabs
SONET/SDH Application 163
OTU RX
OTU RX
Press TEST, OTUk, and OTU (under OTUk RX).
Configuration
Note: See OTU TX on page 157 for more information on Enable Scrambler.
Alarm Analysis
Possible alarms that can be detected are:
³
LOF (Loss Of Frame): LOF is declared when OOF is present for at least
3 ms.
³
OOF (Out-Of-Frame): OOF is declared when FAS (bytes 3, 4, and 5) are
in error for at least 5 consecutive OTU frames.
³
LOM (Loss Of Multiframe): LOM is declared when OOM is present for
at least 3 ms.
³
OOM (Out-Of-Multiframe): OOM is declared when MFAS are in error
for at least 5 consecutive OTU frames.
³
OTU-AIS (OTU - Alarm Indication Signal): OTU-AIS is declared when
polynomial number 11 (PN-11) is over all OTU frame bits including FAS
and MFAS for at least 3 consecutive 8192 bit-interval.