ETSI GTS GSM 08.06
ETSI GTS GSM 08.06
Digital cellular telecommunications system (Phase 2+) (GSM); Signalling transport mechanism specification for the Base Station System - Mobile-services Switching Centre (BSS - MSC) interface (GSM 08.06 version 5.3.0 Release 1996)
standard published 02/01/1999 by European Telecommunications Standards Institute