scope:

This European Telecommunication Standard (ETS) defines functional blocks specific to the Digital Radio Relay System (DRRS) which uses the Synchronous Digital Hierarchy (SDH) for transmitting Mx STM-N signals (where STM-N is Synchronous Transprot Module-(level) N). Considering that: - ITU-T Recommendation G.783 [7] describes the characteristics of SDH equipment functional blocks; and that - ETS 300 417 [1] defines a library of basic building blocks and a set of rules, by which they may be combined to describe an SDH equipment