TS 101 732 : 8.0.0
Current
The latest, up-to-date edition.
DIGITAL CELLULAR TELECOMMUNICATIONS SYSTEM (PHASE 2+) - TANDEM FREE OPERATION (TFO) - SERVICE DESCRIPTION - STAGE 2
Hardcopy , PDF
English
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Foreword
1 Scope
2 References
3 Definitions and abbreviations
3.1 Definitions
3.2 Abbreviations
4 Main Concepts
5 TFO Architecture and Transmission Mechanism
5.1 TFO Access Interfaces and Reference Points
5.2 General In-band Transmission Mechanism for TFO
5.3 High-Level Functions Required for TFO
6 Model of operation
6.1 Overview
6.2 TFO establishment phase
6.3 Transparency of transmission equipments
6.4 Modification of speech codec
6.5 TFO operation
7 Compatibility Issues
8 Interactions with Other Services
8.1 General
8.2 Support of DTMF
9 Operational Aspects
Annex A (Informative): Change history
History
Defines the stage 2 description for the Tandem Free Operation feature which gives the capability to avoid using two GSM speech codecs in mobile to mobile speech calls. The main aim is to achieve improvements in speech quality. The TFO mode of operation could also be used to reduce inter-MSC transmission bandwidth requirements.
| Committee |
SMG 11
|
| DocumentType |
Standard
|
| Pages |
15
|
| PublisherName |
European Telecommunications Standards Institute
|
| Status |
Current
|
| ETSI GSM 01.04 : 050000 | EUROPEAN DIGITAL CELLULAR TELECOMMUNICATION SYSTEM (PHASE 2); DEFINITIONS, ABBREVIATIONS AND ACRONYMS |
| ETSI GSM 08.60 : 4.0.1 | INBAND CONTROL OF REMOTE TRANSCODERS AND RATE ADAPTORS |
| ETSI GSM 08.61 : 4.0.1 | DIGITAL CELLULAR TELECOMMUNICATIONS SYSTEM (PHASE 2+); IN-BAND CONTROL OF REMOTE TRANSCODERS AND RATE ADAPTORS FOR HALF RATE TRAFFIC CHANNELS |
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