ETSI TR 123 039 English Printed Edition English PDF Digital cellular telecommunications system (Phase 2+) (GSM); Universal Mobile Telecommunications System (UMTS); Interface protocols for the connection of Short Message Service Centres (SMSCs) to Short Message Entities (SMEs) (3GPP TR 23.039 version 4.0.0 Release 4)

standard published 03/01/2001 by European Telecommunications Standards Institute