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Voice Specifications

Discussion in 'Electronic Components' started by Praveen Deshpande, Jan 13, 2004.

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  1. Hi All,

    Recently I have got specifications for one project.
    One of the input is "voice" for the module.
    It is written for that;
    INPUT:
    * 1 no. of voice channel with 8KHz bandwidth(duplex)with 600/70-ohm
    selectable
    impedance.
    * Electrical characterstics:600 ohms input impedance(transformer
    coupled) 2-wire input provides 28 volt to power a telephone hand set.

    OUTPUT:
    * 2 wire output
    * 600 ohm output impedance(transformer coupled)
    * 28 volt output for powering a telephone instrument

    There are few other inputs coming in to the module ,we have to MUX
    them together
    and send through multimode fiber link to other end.Similarly we need
    to DEMUX them and route them to the appropriate lines.This all stuff
    we are doing in a FPGA.
    Actually I never worked on voice systems.Thus I am not able to
    understand voice specs properly .
    I suppose I may need to put a CODEC and SLIC.

    Can anybody plz claify this specs for voice and
    what way I may need to process this voice input to meet the given
    specs.

    Anticipating your cooperation.
    Thanks in advance

    Best regards

    praveen
     
  2. You may do better to ask this question on comp.dcom.telecom.tech
    newsgroup.


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