Transmission and Multiplexing (TM) - Generic requirements of transport functionality of equipment - Part 4-1: Synchronous Digital Hierarchy (SDH) path layer functions
This European Telecommunication Standard (ETS) specifies a library of basic building blocks and a set of rules by which they are combined in order to describe transport functionality of equipment. The library comprises the functional building blocks needed to completely specify the generic functional structure of the European Transmission Hierarchies.