ETSI TS 101 351

Digital cellular telecommunications system (Phase 2 ) (GSM); General Packet Radio Service (GPRS); Mobile Station - Serving GPRS Support Node (MS-SGSN) Logical Link Control (LLC) layer specification (GSM 04.64 version 6.5.1 Release 1997) Edition: 6.5.1
European Telecommunications Standards Institute / 01-Nov-1999 / 59 pages