H31-341_V2.5 · Question #505

When the working PQ1 board fails, the device will perform TFS protection switching. Which of the following statements about the switching process are true? (Multiple choice)

The correct answer is A. The cross-connect board detects the failure of the PQ1 board through the board status bus B. If the protection PQ1 board is normal, the cross-connect board sends a switching message to the D75S C. The D75S board responds to the switchover message by transmitting service to the shared protection D. The protection PQ1 board receives and processes the services transmitted from the D76S board to the. See the full explanation below for the reasoning.