TS 04.53 – Tandem Free Operation (TFO) Protocol
3GPP TS 04.53 is the 3GPP Technical Specification for Tandem Free Operation (TFO) Protocol. It is part of 3GPP R99 (version 1160).
Inband signaling protocol for transparent speech codec bypass between transcoders to improve quality and efficiency in mobile-to-mobile calls.
Releases and versions of TS 04.53
| Release | Latest version | Links |
|---|---|---|
| R99 | 1160 | Read · Download (3GPP) |
Scope of TS 04.53
Category: Services (Speech Codecs). Technology generation: 2G. Network layer: CoreNetwork.
Who should read this specification?
- Network operators
- Device manufacturers
Implementation notes
Complexity level: Intermediate. Implementation difficulty: Medium.
Key technologies
Other specifications in the 04 series
- TS 04.22 Radio Link Protocol for GSM Data Transmission
- TS 04.30 Location Services Operations Stage 3
- TS 04.31 Radio Resource LCS Protocol (RRLP) Definition
- TS 04.35 MS Based Location Service Interface Messages
- TS 04.56 CTS Radio Interface Layer 3 Procedures
- TS 04.57 CTS Supervising Management Procedures
- TS 04.60 GPRS RLC/MAC Procedures for Radio Interface
- TS 04.63 Packet Data on Signalling Channels
Related glossary terms
Related topics
Frequently asked questions
What is 3GPP TS 04.53?
3GPP TS 04.53 is the 3GPP Technical Specification for Tandem Free Operation (TFO) Protocol. Inband signaling protocol for transparent speech codec bypass between transcoders to improve quality and efficiency in mobile-to-mobile calls.
Which 3GPP releases include TS 04.53?
TS 04.53 is part of 3GPP R99. The latest version on 3GPP Explorer is 1160 (R99).
What category does TS 04.53 belong to?
TS 04.53 belongs to the Services (Speech Codecs) category of 3GPP specifications. It applies to 2G networks.
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