Compared with PDH, the main advantages of SDH are reflected in which of the following aspects? (Multiple choice)

The correct answer is A. Interface specification B. Synchronous multiplexing C. Operation and maintenance D. Strong compatibility. See the full explanation below for the reasoning.

Question

Options

AInterface specification
BSynchronous multiplexing
COperation and maintenance
DStrong compatibility
EHigh frequency band utilization

How the community answered

(65 responses)

A
82% (53)
E
18% (12)

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