Trail
• Bandwidth resource that carry multiplexed signal from one point to another in the network.
• The Trail’s extremities are TTPs (Trail Termination Point), where the signal is demultiplexed into points that can be cross-connected with another points in the same NE.
• The purpose of a Trail is adaptation, so a Trail will generate one or more Link Connection(s) (LC).
• Trails can exist in all Layer Rates. Typical Trails seen in NP:
− E12 Trail: created by FOXMAN-UN BP as an E12 section
− VC12 Trail: created by FOXMAN-UN NP, which spans an SDH network
− P12 Trail: automatically created inside an E12 Trail and VC12 Trail.
For more details, please refer to TE (Circuit, Trails) and Working Path.