Digital cellular telecommunications system (Phase 2) - Mobile-services Switching Centre-Base Station System (MSC-BSS) interface - Layer 3 specification (GSM 08.08 version 4.12.1)
Digital cellular telecommunications system (Phase 2) - Base Station System (BSS) equipment specification - Part 2: Signalling aspects (GSM 11.23 version 4.9.1)
Digital Enhanced Cordless Telecommunications (DECT) - Global System for Mobile communications (GSM) - DECT/GSM Interworking Profile (IWP) - Access and mapping (protocol/procedure description for 3,1 kHz speech service)
