VeEX MPA User Manual page 193

MPA_e_manual_D07-00-129P_RevA00
Protocol Tabs
Use screen A of the Optical Channel Data Unit (ODU) Overhead to edit the Path
Monitoring overhead and the Fault Type and Fault Location (FTFL) overhead bytes and
messages. The FTFL is a 256-byte message that is divided into two parts: the Forward
FTFL and the Backward FTFL.
Forward FTFL
The Forward FTFL consists of bytes 0 to 127 of the FTFL message.
Option
Fault
OI
OS
Backward FTFL
The Backward FTFL consists of bytes 128 to 255 of the FTFL message.
Option
Fault
OI
OS
ODU Path Monitoring Overhead
193
Description
Byte 0 is the Fault Identification field. It provides a fault
status and uses the following codes:
0000 0000: No Fault
0000 0001: Signal Fail
0000 0010: Signal Degrade
0000 0011 through 1111 1111 are reserved for future use.
Bytes 1 through 9 are used for the Operator Identifier field.
Bytes 10 through 127 are used for the Operator Specific
field.
Description
Byte 128 is the Fault Identification field. It provides a fault
status and uses the following codes:
0000 0000: No Fault
0000 0001: Signal Fail
0000 0010: Signal Degrade
0000 0011 through 1111 1111 are reserved for future use.
Bytes 129 through 137are used for the Operator Identifier
field.
Bytes 138 through 255 are used for the Operator Specific
field.