In SDH an AU-4 unit is formed by:
A.
Adding a C12 to its path overhead
B.
Adding a VC4 to a VC4 pointer
C.
Multiplexing TU12s
D.
Combining a VC3 and its VC3 pointer
In SDH an AU-4 unit is formed by:
In SDH an AU-4 unit is formed by:
In SDH an AU-4 unit is formed by:
In SDH an AU-4 unit is formed by:
A.
Adding a C12 to its path overhead
B.
Adding a VC4 to a VC4 pointer
C.
Multiplexing TU12s
D.
Combining a VC3 and its VC3 pointer