Lop Rx (Sonet) - EXFO FTB-8510B Guia Del Usuario

LOP RX (SONET)

Press TEST, LOP , and Path (under LOP RX).
Error Analysis
BIP-2 (Bit-Interleave Parity - 2 bits): The BIP-2 error indicates a parity
error by performing a routine even-parity check over all VT1.5 bytes of
the previous frame of a composite signal (VT1.5/VT2/VT6).
REI-V (Remote Error Indicator): The REI-V error is declared when bit 3
of the V5 byte is set to "1".
Note: Refer to Alarm/Error Measurements on page 47 for H/C LEDs, Seconds,
Count, and Rate information.
Alarm Analysis
AIS-V (Alarm Indication Signal - VT): The AIS-V alarm is declared when
V1 and V2 bytes for the VT path contain an all-ones pattern in three
consecutive superframes.
LOP-V (Loss Of Pointer - VT): The LOP alarm indicates that a valid
pointer is not found in N consecutive superframes (where 8 ≤ N ≤ 10),
or if N consecutive NDFs ("1001" pattern) are detected.
RDI-V (Remote Defect Indication - VT): The RDI-V alarm is declared
when bit 8 of the V5 byte contains "1" in five consecutive VT
superframes while bits 6 and 7 of the Z7 byte contain the "00" or "11"
pattern.
SONET/SDH Application
SONET Tabs
LOP RX (SONET)
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