TS 101 299 V6.1.0 (1998-07) Technical Specification Digital cellular telecommunications system (Phase 2+); General Packet Radio Service (GPRS); Base Station System (BSS) - Serving GPRS Support Node (SGSN) interface; Network Service (GSM 08.16 version 6.1.0 Release 1997) GLOBAL SYSTEM FOR MOBILE COMMUNICATIONS R