For the 1+1 unidirectional path protection and 1:1 bidirectional path protection, whic

A.The PTN equipment supports 1+1 unidirectional path protection and 1:1 bidirectional path protection.

B.1:1 bidirectional path protection supports return mode and non-return mod

C.The protection delay can be configured to be 0-10 s (with the step length of 100 ms).

D.In the return mode, WTR can be configure to be 1-12 min (with the step length of 1 min).