B1: bip-8, E1: orderwire, F1: user – EXFO FTB-8100 Series Transport Blazer for FTB-200 User Manual
Page 466: D1, d2 and d3: data communications channel (dcc)
Glossary
454
FTB-8100 Series Transport Blazer
SONET - Section Overhead (SOH)
B1: BIP-8
The BIP-8 (Bit-Interleaved Parity) byte provides section error monitoring.
The byte is calculated by performing a routine even-parity check over all
bits of the previous frame of a composite signal (STS-1 to STS-n). This byte
is only defined for the first STS-1 frame of a composite signal.
E1: Orderwire
The Orderwire provides a 64 Kbps voice channel for communication
between two STEs (Section Terminating Equipment). This byte is only
defined for the first STS-1 frame of a composite signal.
F1: User
The User byte is reserved for user purposes. This byte is only defined for
the first STS-1 frame of a composite signal.
D1, D2 and D3: Data Communications Channel
(DCC)
The Data Communication Channel (D1, D2 and D3) provides a 192 Kbps
data communication between two STEs for operation functions such as
OAM&P. This byte is only defined for the first STS-1 frame of a composite
signal.
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