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 Transport Module-(level) N).
IN_DEVELOPMENT
prSSH ETS 300 635:1996 ed.1
40.20
DIS ballot initiated: 12 weeks
Feb 9, 2026
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