Re: Packet at the physical level

From: Robin Gilks (ixtolq@mx.dy.fi)
Date: Fri Sep 19 2003 - 01:37:40 EEST

  • Next message: Mike Davies: "Re: Packet at the physical level"

    Greetings

    To get a view of the physical layer just above the tones themselves, take
    a look at the bit-bashing in the TVIPUG (Thames Valley IP User Group) 9k6
    modem. This does all the NRZ/NRZI conversion, the CRC generation and
    checking, the bit stuffing and stripping on a bit level (makes it a bit
    clearer than byte level I think!!). Its also independent of the speed and
    avoids the pitfall of thinking all packet being at 1200bps :-))

    http://www.tvipug.org/download/ipri-1.00.tar.gz

    > I'm trying to find out what happens at the physical level with
    > Ax25 packet. I've tried looking at the source code but either I'm
    > looking in the wrong place, or I don't understand.
    > 

    -- 
Robin Gilks
Internet: qofngctk.kqbbhwf@mybigcity.net    http://www.gilks.org
Tel:      (+64) (3) 357 9383

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