|
|
access |
F1 |
Used for special maintenance purpose supplying temporary data/audio path connection, and providing 64K
co-directional data interface |
B1 |
Used for the error code monitor of the regeneration section |
B2 |
Used for the error code monitor of MS |
K1, K2 |
Used for the auto-protection switchover (APS) command of MS |
S1 |
b5~b8 used for synchronous status message |
M1 |
Used for MS far-end difference indication |
AU pointer |
AU PTR |
The rate adjustment on AU level |
POH |
J1 |
Used for high-order path trace, able to be set |
B3 |
Used for path error code monitoring |
C2 |
Used for expressing the composition or maintenance
status of VC-3/VC-4/VC-4X, able to read and write |
G1 |
Used for returning the status and performance of path terminal to the path origin of VC3/VC4/VC4XC |
F2, F3 |
Not applying |
H4 |
Affording the general position indication to payload, as well as the special payload Position (i.e. H4 may be the multi-frame position indication of VC12 and VC2); and
performing VC3/VC4 virtual concatenation |
K3 |
Not applied |
N1 |
Not applied |
V5 |
Providing the functions of error code test, signal mark and channel status for VC1/VC2 |
J2 |
VC1, VC2 path trace byte, able to be set |
N2 |
Not supported |
K4 |
Used for the virtual concatenation process of low-order path |