Which of the following statements about the MSP ring is correct? (Multiple choice).
Answer : A, B, C, D
When the J1 byte does not match, an alarm () is reported and the service may be interrupted.
Answer : C
Which of the following is the steps to multiplex a low-speed service into a high-speed SDH service? (Multiple choice).
Answer : A, C, D
When using the LCAS function, which of the following overhead bytes is used to transmit control information? (Multiple Choices)
Answer : B, D
Which of the following device domains can be managed by U2000? (Multiple choice).
Answer : A, B, C, D
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 : B
The refractive index n1 of the fiber core must be the Q of the cladding refractive Mo n2, which is a necessary condition for transmitting the optical signal in the optical fiber.
Answer : A