Principles of two-fiber bidirectional MSP ring protection switching

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Principles of two-fiber bidirectional MSP ring protection switching:
The latter half timeslots (protection channel) in a fiber are used to protect the former half timeslots (working channel). During the switching, the two ends of the failure point are bridged, services pass through the intermediate NEs, and the service flow traverses the entire ring.

Other related questions:
Msp ring switch to protection theroy
After half time slot on the fiber (channel) protection before half time slot on the fiber channel (work), the rearrangement of fault point on both ends of the bridge, through network elements among them, the business flow to traverse the whole ring

Whether MSP ring protection switching will be triggered by removing a line board
Whether MSP ring protection switching will be triggered by removing a line board: When the protocol status is normal, the MSP ring protection switching will be triggered by removing a line board.

Effect on MSP ring protection when an NE is powered off
Effect on MSP ring protection when an NE is powered off: If an NE with space-division and time-division cross-connections (for example, VC-4:1 cross-connects to VC-4:2, or VC-4:1 to VC-12:1 cross-connect to VC-4:1 to VC-12:2) is powered off, the space-division and time-division cross-connection services that pass through this NE will be interrupted.

Switching mechanism of the SNCP ring with 1+1 linear MSP
Switching mechanism of the SNCP ring with 1+1 linear MSP: The SNCP ring and 1+1 linear MSP are two independent protection modes that do not affect each other.

Precautions for changing ring MSP to linear MSP on the Metro 3000
After ring MSP is changed to linear MSP on the Metro 3000, services must be reconfigured.

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