ETSI TS 128 062
ETSI TS 128 062
Digital cellular telecommunications system (Phase 2+) (GSM); Universal Mobile Telecommunications System (UMTS); Inband Tandem Free Operation (TFO) of Speech Codecs; Service Description; Stage 3 (3GPP TS 28.062 version 4.1.1 Release 4)
standard published 08/01/2001 by European Telecommunications Standards Institute
