Which of the following are the main advantages of SDH? (Multiple Choice)
A . Standard interfaces
B . Synchronous multiplexing
C . Powerful OAM
D . High compatibility
Answer: ABCD
Which of the following are the main advantages of SDH? (Multiple Choice)
A . Standard interfaces
B . Synchronous multiplexing
C . Powerful OAM
D . High compatibility
Answer: ABCD