NEC UPD98413 User Manual page 92

(iii) B3 byte (Path BIP-8)
BIP-8 operation is performed on the STS-12c SPE area before frame scramble, and the result of the
operation is inserted in the B3 byte of POH before frame scramble of the next transmit frame, and is
transmitted.
(b) Transmitting Line REI (Line Remote Error Indication)
Whether Line BIP-96 error has occurred is reported to a unit in the upstream. If a B2 error is detected in the
receive frame, the number of erroneous interleaved bit blocks is automatically stored to the M1 byte.
(c) Transmitting Path REI (Path Remote Error Indication)
Whether Path BIP-8 error occurs is reported to a unit in the upstream. When the µ PD98413 detects a B3
error in the receive frame, it automatically stores the erroneous interleaved bit blocks to the G1 byte (bits 1 to
4) of the transmit frame.
92
CHAPTER 3 FUNCTIONAL OUTLINE
1,044 bytes
P
Fixed
O
Before scramble
stuff
9 rows
H
B3
Before scramble
9 rows
: BIP operation range B3: BIP-8 operation result of preceding
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