The dual fiber ring topology consisting of three network elements is arranged in counterclockwise order as the service between A, B and C A and C occupies the first VC-48 on the short path VC-12 time slots, B and C of the same service also occupy the 48th of the first VC-4 on the short path VC-12 time slots
The number of bit False blocks on each VC4 channel is detected by B3 on the receiving side. At the same time, the information is sent back to the sender via Q, and HP-REI and HP-FEBBE report on the sender.
In the case of SNCP, the board selectively receives the service. Therefore, SNCP can protect services on the line.
Which of the following clock operating modes supports the ITU-T G.781 standard? (Multiple choice).
The following is the frame structure of the STM-16?
Which of the following statements about the EFS4 board are correct? (Multiple choice).
Which of the following is not a nonlinear effect?
The device IP address of the gateway element and the non-gateway element must be set in the same network segment.
The backplane has two 48V power cords, and each board gets two -48V power supplies from the backplane. After combining the power supply via diodes, the various voltages required for each component are obtained by means of a DC/DC power module and a linear mane swap.
Which of the following are device-level protection schemes for SDH products? (Multiple choice).
