scope:

The present document specifies requirements of transport functionality of equipment, which processes SDH concatenated path layers. The functionality is described by a set of functional building blocks and a set of rules by which they are combined. The generic description method and generic functionality is described in EN 300 417-1-1 [1] and ITU-T Recommendation G.806 [2]. For equipment which is compliant with the present document the processing of SDH concatenated path layers with in the equipment shall be describable as an interconnection of a subset of the functional blocks contained within the present document.