DIN EN 300417-2-1:2002-06
Действует
Transmission and Multiplexing (TM) - Generic requirements for transport functionality of equipment - Part 2-1: Synchronous Digital Hierarchy (SDH) and Plesiochronous Digital Hierarchy (PDH) physical section layer functions (Endorsement of the English version EN 300417-2-1 V 1.2.1 (2001-10) as German Standard)
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