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Section rx (sonet), Error analysis – EXFO FTB-8100 Series Transport Blazer for FTB-200 User Manual

Page 184

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SONET Tabs

172

FTB-8100 Series Transport Blazer

Section RX (SONET)

Section RX (SONET)

Press Main, Test, SONET, Section, and Section RX.

Error Analysis

FAS (Frame Alignment Signal): A FAS defect indicates that at least one A1
or A2 byte of the FAS word is in error.

B1 (BIP-8, Bit-Interleave Parity - 8 bits): The B1 (BIP-8) error indicates a
Section parity error by performing a routine even-parity check over all
frames of the previous STS-n signal (located in the first STS-1 of an STS-n
signal).