ETSI TS 122 078 English Printed Edition English PDF Digital cellular telecommunications system (Phase 2+) (GSM); Universal Mobile Telecommunications System (UMTS); Customized Applications for Mobile network Enhanced Logic (CAMEL); Service description - Stage 1 (3G TS 22.078 version 3.2.0 Release 1999)

standard published 01/01/2000 by European Telecommunications Standards Institute