The clock unit can only access the external clock source as the timing signal source of the system through the external clock interface. In addition; It can also output a processed clock and provide a clock source for other devices that need timing.
Answer(s): B
Which of the following statements about the MST functional module is correct? (Multiple choice).
Answer(s): A,D
The 1510nm optical monitoring channel can be effectively amplified after passing through EDF
In the frame structure of the SDH signal, there are large overhead bytes for operation, management, and maintenance (OAM). Overhead bytes account for all bits () of the entire frame and greatly enhance the monitoring capabilities of the network.
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