ETSI ETS 300 563/A1 Amendment 1 to - European digital cellular telecommunications system (Phase 2); Radio Link Protocol (RLP) for data and telematic services on the Mobile Station - Base Station System (MS - BSS) interface and the Base Station System - Mobile-services Switching Centre (BSS - MSC) interface (GSM 04.22)

standard by European Telecommunications Standards Institute, 07/01/1995