EXFO FTB-8510B Guia Del Usuario página 809

Alarm Generation
Type: The following alarm types are available. The default setting is
OTU-AIS.
LOF (Loss Of Frame): Generates error in FAS bits continuously.
OOF (Out-Of-Frame): Generates error in all FAS bits for 5 consecutive
OTU frames.
LOM (Loss Of Multiframe): Generates error in MFAS bits continuously.
OOM (Out-Of-Multiframe): Generates error in multiframe number for 5
consecutive OTU frames.
OTU-AIS (OTU - Alarm Indication Signal): Generates polynomial
number 11 (PN-11) over all OTU frame bits including FAS and MFAS
continuously.
OTU-BDI (OTU - Backward Defect Indication): Generates "1" for the
BDI bit in the SM overhead field (byte 3, bit 5) continuously.
OTU-IAE (OTU - Incoming Alignment Error): Generates "1" for the IAE
bit in the SM overhead field (byte 3, bit 6) continuously.
OTU-BIAE (OTU - Backward Incoming Alignment Error): Generates
"1011" for the BEI/BIAE bits in the SM overhead field (byte 3, bits 1 to 4)
continuously.
On/Off button: The On/Off button is used to activate/deactivate the
selected alarm. This setting is disabled (Off) by default.
SONET/SDH Application
OTN Tabs
OTU TX
159