| Pointer
adjustment (2) |
|
|
| When VC-4 clock
rate is smaller than STM-1 clock rate |
|
| => pointer value is
shifted back three bytes |
|
| SOH |
| STM-1 payload |
|
|
| old |
|
| new |
|
| VC-4 (Virtual
container) |
| AU-4 pointer |
|
|
| Three VC
bytes |
|
| are
stored here |
|