ETSI TS 100 541
ETSI TS 100 541
Digital cellular telecommunications system (Phase 2+) (GSM); Routeing of calls to/from Public Data Networks (PDN) and the GSM Public Land Mobile Network (PLMN) (GSM 03.70 version 6.0.0 Release 1997)
standard published 04/01/1999 by European Telecommunications Standards Institute