A.WSM9

B.RDU9

C.WSMD9

D.WSD9

A.1+1 optical line protection and 1:1 optical line protection use the same protection board

B.The main difference between 1:1 optical line protection and 1+1 optical line protection is whether the APS protocol is required.

C.According to different placement of OLP boards in the network, 1+1 optical line protection can be divided into 1+1 OMS path protection and 1+1 OTS path protection.

D.1:1 optical line protection switching mode can only be double-ended switching

A.FALSE

B.TRUE

A.Advanced oDSP algorithm

B.High-order modulation (xQAM)

C.FDDM/Nyquist spectrum compression technology

D.Multi-carrier generation and multiplexing

A.Network first, then network element

B.Low speed first, then high speed

C.External first, then transfer

D.Advanced first, then low level