ETSI - TS 101 108
Digital Cellular Telecommunications System (Phase 2+); Tandem Free Operation (TFO); Service Description; Stage 1
inactive
| Organization: | ETSI |
| Publication Date: | 1 November 1997 |
| Status: | inactive |
| Page Count: | 10 |
scope:
This specification specifies the stage 1 description for the Tandem Free Operation (TFO) feature which provides the capability to avoid using two GSM speech codecs in mobile to mobile speech calls. The primary aim is to realise improvements in speech quality. The TFO mode of operation could also be used to reduce inter-Mobile services Switching Center (MSC) transmission bandwidth requirements.
In analogy with CCITT Recommendations I.130 [1], Stage 1 is an overall service description, from the service subscriber's and user's standpoints, that views the network as a single entity which provides services to the user.
Document History
July 1, 2001
Digital Cellular Telecommunications System (Phase 2+); Tandem Free Operation (TFO); Service Description; Stage 1
A description is not available for this item.
July 1, 1999
Digital Cellular Telecommunications System (Phase 2+); Tandem Free Operation (TFO); Service Description; Stage 1
The present document specifies the stage 1 description for the Tandem Free Operation (TFO) feature which provides the capability to avoid using two GSM speech codecs in mobile to mobile speech calls....
January 1, 1998
Digital Cellular Telecommunications System (Phase 2+); Tandem Free Operation (TFO); Service Description; Stage 1
This specification specifies the stage 1 description for the Tandem Free Operation (TFO) feature which provides the capability to avoid using two GSM speech codecs in mobile to mobile speech calls....
TS 101 108
November 1, 1997
Digital Cellular Telecommunications System (Phase 2+); Tandem Free Operation (TFO); Service Description; Stage 1
This specification specifies the stage 1 description for the Tandem Free Operation (TFO) feature which provides the capability to avoid using two GSM speech codecs in mobile to mobile speech calls....