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About This Item

 

Full Description

ETSI TS 122 053 specifies the stage 1 description for the Tandem Free Operation (TFO) feature which provides the capability to avoid tandeming 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 ITU-T 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

  1. ETSI TS 122 053


    Digital cellular telecommunications system (Phase 2+) (GSM); Universal Mobile Telecommunications System (UMTS); Tandem Free Operation (TFO); Service description; Stage 1 (3GPP TS 22.053 version 16.0.0 Release 16)

    • Most Recent
  2. ETSI TS 122 053


    Digital cellular telecommunications system (Phase 2+) (GSM); Universal Mobile Telecommunications System (UMTS); Tandem Free Operation (TFO); Service description; Stage 1 (3GPP TS 22.053 version 15.0.0 Release 15)

    • Historical Version
  3. ETSI TS 122 053

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    viewing


    Digital cellular telecommunications system (Phase 2+); Universal Mobile Telecommunications System (UMTS); Tandem Free Operation (TFO); Service description; Stage 1 (3GPP TS 22.053 version 14.0.0 Release 14)

    • Historical Version
  4. ETSI TS 122 053


    Digital cellular telecommunications system (Phase 2+); Universal Mobile Telecommunications System (UMTS); Tandem Free Operation (TFO); Service description; Stage 1 (3GPP TS 22.053 version 13.0.0 Release 13)

    • Historical Version
  5. ETSI TS 122 053


    Digital cellular telecommunications system (Phase 2+); Universal Mobile Telecommunications System (UMTS); Tandem Free Operation (TFO); Service description; Stage 1 (3GPP TS 22.053 version 12.0.0 Release 12)

    • Historical Version
  6. ETSI TS 122 053


    Digital cellular telecommunications system (Phase 2+); Universal Mobile Telecommunications System (UMTS); Tandem Free Operation (TFO); Service description; Stage 1 (3GPP TS 22.053 version 11.0.0 Release 11)

    • Historical Version
  7. ETSI TS 122 053


    Digital cellular telecommunications system (Phase 2+); Universal Mobile Telecommunications System (UMTS); LTE; Tandem Free Operation (TFO); Service description; Stage 1 (3GPP TS 22.053 version 10.0.0 Release 10)

    • Historical Version
  8. ETSI TS 122 053


    Digital cellular telecommunications system (Phase 2+); Universal Mobile Telecommunications System (UMTS); LTE; Tandem Free Operation (TFO); Service description; Stage 1 (3GPP TS 22.053 version 9.0.0 Release 9)

    • Historical Version
  9. ETSI TS 122 053


    Digital cellular telecommunications system (Phase 2+); Universal Mobile Telecommunications System (UMTS); LTE; Tandem Free Operation (TFO); Service description; Stage 1 (3GPP TS 22.053 version 8.0.0 Release 8)

    • Historical Version
  10. ETSI TS 122 053


    Digital cellular telecommunications system (Phase 2+); Universal Mobile Telecommunications System (UMTS); Tandem Free Operation (TFO); Service description; Stage 1 (3GPP TS 22.053 version 7.0.0 Release 7)

    • Historical Version
  11. ETSI TS 122 053


    Digital cellular telecommunications system (Phase 2+); Universal Mobile Telecommunications System (UMTS); Tandem Free Operation (TFO); Service description; Stage 1 (3GPP TS 22.053 version 6.0.0 Release 6)

    • Historical Version
  12. ETSI TS 122 053


    Digital cellular telecommunications system (Phase 2+); Universal Mobile Telecommunications System (UMTS); Tandem Free Operation (TFO); Service description; Stage 1 (3GPP TS 22.053 version 5.0.0 Release 5)

    • Historical Version
  13. ETSI TS 122 053


    Digital cellular telecommunications system (Phase 2+) (GSM); Universal Mobile Telecommunications System (UMTS); Tandem Free Operation (TFO); Service Description - Stage 1 (3GPP TS 22.053 version 4.0.1 Release 4)

    • Historical Version
  14. ETSI TS 122 053


    Universal Mobile Telecommunications System (UMTS); Digital cellular telecommunications system (Phase 2+); Tandem Free Operation (TFO); Service Description - Stage 1 (3GPP TS 22.053 version 4.0.0 Release 4)

    • Historical Version