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TFO/TRFO in GSM

Viewing 8 posts - 1 through 8 (of 8 total)
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  • #65320 Reply
    Bob
    Guest

    Hi

    Dose anyone have experience of implementing of TFO/TRFO in GSM ? how do they improve/Save the Digital Proceeding (DSP)Recourses in MGW?
    This feature enable TFO/TRFO in GSM over TDM.

    #65321 Reply
    pix
    Guest

    Hi Bob,

    It should be your Transcoder that handles the DSP of your GSM network. Is your TC integrated in your MGW ?

    If it is, then yes, the TFO (more than the TrFO) should decrease the DSP load of your MGW. But this certainly depends on product spec of your MGW.

    cheers
    pix

    #65322 Reply
    Bob
    Guest

    Actually AMR-FR-HR in transcoder changes to PCM , in MGW PCM is changed to AMR(Compressed) and again in destination MGW, AMR backs to PCM and then in Transoder changes to one of the Codecs.
    Now if A call use AMR codec the transcoder of B should use AMR too.

    TC (AMR+TFO)–>MGW(AMR)–>MGW2(AMR+TFO)–>TC(AMR)–>Radio

    so as can been seen , quality will be increased in addition some TC can be saved as well. i think changing PCM to AMR needs more resources in comparison with (AMR+TFO) to AMR in MGW

    #65323 Reply
    Bob
    Guest

    GSM with TFO+TrFO
    OoBTC in BICC, This feature requires support for GSM in the layered architecture and applies to ATM and IP based packet switched core networks and provides End-to-end free transcoding for GSM to GSM calls and coded speech on Core Network
    This is what Ericsson has Suggested, as a TFO/TRFo.
    But I have heard this issue can not be implemented in 2G.
    What do you think?
    Thanks

    #65324 Reply
    sasa
    Guest

    Hi

    I wonder that if TrFO is active for “UMTS only” or “Dual system”, PCMA could be use both of Iu and Nb’ interfaces?

    #65325 Reply
    sasa
    Guest

    Hi all,

    Do you know any SIP Softphone having TrFO capability?

    #65326 Reply
    Nguyễn Lượng
    Guest

    can you give me the document for AFO and 7.95 code rate.

    #71761 Reply
    Nora
    Guest

    We have Huawei core and Ericsson radio , does ericsoon support TrFo . Now we want to have reassignment as prerequisite of TrFo but our radio team mentioned that Ericsson is not supporting reassignment especially when A party codec and B party Codec have difference on AMR NB codec (e.x . A party codecs is 12.2 , 7.4, 5,9 and 4.75 ) and B party codec is just 12.2 in this scenario they mentioned that Ericsson RNC can’t differentiate the codecs and reassignment will not be accepted .

    would you please help if it is correct ?

Viewing 8 posts - 1 through 8 (of 8 total)
Reply To: TFO/TRFO in GSM
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