ETSI TS 101 351
ETSI TS 101 351
Digital cellular telecommunications system (Phase 2+) (GSM); General Packet Radio Service (GPRS); Mobile Station (MS) - Serving GPRS Support Node (SGSN); Logical Link Control (LLC) layer specification (GSM 04.64 version 6.2.0 Release 1997)
standard published 11/01/1998 by European Telecommunications Standards Institute