The tributary SNCP protection uses the dual fed and selective receiving function of the electrical-lay cross-connections to protection the accessed client services. The cross-connect granularity is ODUk service.
The tributary SNCP protection complies with the following recommendations.
- ITU-T Recommendation G.798 (Characteristics of optical transport network hierarchy equipment functional blocks)
- ITU-T Recommendation G.873.1 (The APS protocol and protection switching operation for the linear protection schemes for the Optical Transport Network at the Optical Channel Data Unit (ODUk) level)
- ITU-T Recommendation G.808.1 (The generic functional models, characteristics and processes associated with various linear protection schemes for connection-oriented layer networks)
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