VeEX MPA User Manual page 192

MPA_e_manual_D07-00-129P_RevA00
BIP-8
BEI/BDI/IAE/RES
GCC0-1 and
GCC0-2
RES-1 and RES-2
SAPI
DAPI
Specific
OTN Transmit - OTN OH / ODU-A
The Transmit Optical Channel Data Unit (ODU) overhead bytes and messages can be
edited using three separate screens on the unit: ODU-A, ODU-B, and TCM.
Edits the OTU SM error detection code signal. It is a single
byte that uses a Bit Interleaved Parity-8 code.
The Backward Error Indication (BEI) and Backward Incoming
Alignment Error (BIAE) subfield is a four-bit signal sent in the
upstream direction to indicate that an error has been
detected.
The Backward Defect Indication (BDI) subfield is a single bit
sent in the upstream direction to indicate that a signal fail
status has been detected. This bit is set to 1 to indicate a
BDI.
The Incoming Alignment Error (IAE) subfield is a single bit
used to indicate a frame alignment error. This bit is set to 1 to
indicate an IAE.
Two bytes of the Section Monitoring overhead are reserved
(RES) for future use.
General Communication Channel 0, Byte 1 and Byte 2.
Two bytes of the OTU overhead are reserved for future use.
Source Access Point Identifier. The SAPI is the first part of
the multi-frame Trail Trace Identifier (TTI) structure. A 15-
character string can be entered for the SAPI.
Destination Access Point Identifier. The DAPI is part of the
multi-frame TTI structure. A 15-character string can be
entered for the DAPI.
Operator Specific. This is part of the TTI structure. A 32-
character string can be entered for this value.
OTN Tab
192