EXFO FTB-8510B Guia Del Usuario página 827

OTN Tabs
ODU TCM RX
Alarm Analysis
TCMi-LTC (TCMi - Loss of Tandem Connection): TCMi-LTC is declared
when the STAT information in the TCMi Byte 3, bits 6, 7, and 8 are "000"
for at least 3 consecutive frames.
TCMi-TIM (TCMi -Trace Identification Mismatch): TCMi-TIM is declared
when the expected TCMi SAPI and/or TCMi DAPI do not match the
received TCMi SAPI and/or TCMi DAPI for at least 3 TTI. This alarm is
only available when the Enable TIM SAPI and/or DAPI check boxes are
selected from ODU TCM TTI RX on page 178.
TCMi-BDI (TCMi - Backward Defect Indication): TCMi-BDI is declared
when the BDI bit in the TCMi overhead field Byte 3, bit 5 is "1" for at
least 5 consecutive frames.
TCMi-IAE (TCMi - Incoming Alignment Error): TCMi-IAE is declared
when the STAT information in the TCMi is "010" for at least 3
consecutive frames.
TCMi-BIAE (TCMi - Backward Incoming Alignment Error): TCMi-BIAE is
declared when the BEI/BIAE bits in the TCMi overhead field Byte 3, bits
1 to 4 are "1011" for at least 3 consecutive frames.
Note: "i" is the level (1 to 6) of the selected TCM.
177
SONET/SDH Application