Selection of the SNCP protection type during configuration of the ODUk SNCP protection on TOM boards

1. SNC/I: SNC protection for inherent monitoring
(1) Description: This method protects services (for example, server-layer trails and server/ODUk adaptation) against defects detected on the ODUk link. No defect detection is performed at the ODUk layer itself. Connections are indirectly monitored by using the data that is inherently available from the server-layer network.
(2) Application scenario:
a. The subnet that ODUk signals traverse does not have an electrical regeneration site.
b. The tributary boards can receive any client-side services.
2. SNC/N: SNC protection for non-intrusive monitoring
(1). Description: This method protects services against defects detected at the E2E ODUk path (ODUkP) layer or ODUk TCM (ODUkT) sub-layers. Defect detection is performed at the ODUk layer itself. The connections are directly monitored by use of listen-only (non-intrusive) monitoring of the original characteristic information.
(2) Application scenario:
a. No limit is set on the type of sites in the subnet where ODUk signals traverse.
b. In case of SNC/N (PM), it is recommended that tributary boards receive non-OTN services. In case of SNC/N (TCM), tributary boards can receive any client-side services.
3. SNC/S: SNC protection for sub-layer monitoring
(1) Description: This method protects services against defects detected at the TCM sub-layer (ODUkT) of the ODUk protection. Switching can be triggered only by defects of the protected domain. An ODUk fault cannot trigger protection switching.
(2) Application scenario:
a. No limit is set on the type of sites in the subnet where ODUk signals traverse.
b. Tributary boards can receive any client-side services.

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