Error analysis – EXFO FTB-8100 Series Transport Blazer for FTB-200 User Manual
Page 151
OTN Tabs
SONET/SDH Application
139
OTU RX
Error Analysis
Possible errors that can be detected are:
³
FAS (Frame Alignment Signal): Indicates the FAS bits in error.
³
MFAS (Multiframe Alignment Signal): Indicates the MFAS bits in error.
³
OTU-BIP-8 (OTU - Bit Interleave Parity-8): Indicates the SM BIP-8
mismatch between the received value and locally computed value
(0 to 8).
³
OTU-BEI (OTU - Backward Error Indication): Indicates SM BEI errors
received from the DUT (value 0 to 8).
OTU BEI bits
(1234)
BIP violations
ODUk BEI bits
(1234)
BIP violations
0000
0
0101
5
0001
1
0110
6
0010
2
0111
7
0011
3
1000
8
0100
4
1001 to 1111
0
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