EXFO FTB-8100 Series, User Manual

Page: 149 / 518

OTN Tabs
SONET/SDH Application
137
OTU RX
OTU RX
Press
Main
,
Test
,
OTN
,
OTU
, and
OTU RX
.
Configuration
Note: See OTU TX on page 133 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.