EXFO FTB-8100 Series Transport Blazer for FTB-200 - Manual (Page 194)

SONET Tabs
182 FTB-8100 Series Transport Blazer
Line RX (SONET)
For OC-192: The REI-L error is declared when either the M1 byte
located in the STS-1 #7 indicates that one or more BIP violations have
been detected, or the combination of the M0 and M1 bytes indicates
that one or more BIP violations have been detected. Refer to
OC-192/STM-64 REI-L/MS-REI on page 386 for REI-L computation
method.
M1 Indicates
0000 0000 0 BIP violation
0000 0001 1 BIP violation
0000 0010 2 BIP violations
: :
1111 1111 255 BIP violations
M0
Located in STS-1 #4
M1
Located in STS-1 #7
Indicates
0000 0000 0000 0000 0 BIP violation
0000 0000 0000 0001 1 BIP violation
0000 0000 0000 0010 2 BIP violations
: :
0000 0110 0000 0000 1536 BIP violations
0000 0110 0000 0001 0 BIP violation
: :
1111 1111 1111 1111 0 BIP violation