VeEX MPA User Manual page 191

MPA_e_manual_D07-00-129P_RevA00
Protocol Tabs
The OTN OH screen allows you to configure the following overhead signals:
OTU
ODU-A
ODU-B
TCM
OPU
OH INTRUDE
OTN Transmit - OTN OH / OTU
The following overhead options are available from the OTU screen.
Option
OA1
OA2
MFAS
TTI
191
Description
Edits the first three bytes of the Frame Alignment Signal
(FAS) OH. The default byte value is 1111 0110 (0xF6).
Edits the second three bytes of the FAS OH. The default byte
value is 0010 1000 (0x28).
For OTU-4, the third A2 byte is disabled and has been
allocated as the Logical Lane Marker (LLM).
Edits the Multiframe Alignment Signal OH byte. This byte is
located in row1, column 7 of the OTU OH.
Trail Trace Identifier. The TTI OH byte defines the 64-byte
TTI string. The TTI is part of the OTU Section Monitoring
(SM) OH.
See SAPI, DAPI and Specific trace settings below.