A.After mapping and multiplexing, 34 channels of 0DUO signals can be multiplexed into 1 channel of OTU3[VM] signals

B.80 channels of ODUO signals are mapped and multiplexed, and finally can be multiplexed into 1 channel of OTU4[] signals

C.After mapping and multiplexing, 8 channels of ODUO signals can be multiplexed into 1 channel of 0TU2[VVI] signals

D.After mapping and multiplexing, the 2-way DDUO signal can be multiplexed into 1-way OTU1[V] signal

A.SPIMSTRSTMSAMSPHPT

B.SPIRSTMSAMSPMSTHPT

C.SPIRSTMSPMSPSAHPT

D.SPTMSTMSARSTMSPHPT

A.False

B.True

A.The trigger conditions are that the board is not in place, SF, SD

B.Tributary SNCP protection uses the dual-send and selective-receiving function of the electrical layer crossover to protect the client-side services connected to the tributary board

C.The cross granularity is GE or Any signal

D.When configuring branch SNCP, you need to set the subtype of SNCP