单项选择题
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
A.VC-12和TU-12指针全部为“1” B.整个STM-N帧内除STM-N RSOH外全部为“1” C.整个STM-N帧内除STM-N RSOH和MSOH外全部为“1”
A.1500 B.3000 C.6000 D.4500