2Mbps 信号映射复用到 STM-1 的路径是()
A:VC-12-TU-12-TUG2-TUG3-AU4-AUG-STM-1
B:C-12-VC-12-TU-12-TUG2-TUG3-VC-4-AU4-AUG-STM-1
C:C-12-TU-12-VC-12-TUG2-TUG3-VC-4-AUG-AU4-STM-1
出自:电信业务技能