Re: Hardware TNC (Baycom etc.)

From: Gerd (terhi.victor@logonet.com)
Date: Wed Feb 02 2000 - 11:53:05 EET

  • Next message: Gregory Maxwell: "Re: Hardware TNC (Baycom etc.)"

    Hello Hamish, hello all,

    > On Tue, Feb 01, 2000 at 03:53:58PM +0100, Gerd wrote:
    > > There are some good reasons to still use something like BayCom in our days.
    > > The first reason is: There are still frequencies that one cannot operate
    > > more than 1200 bps on, due to bandwidth limitations, for example.
    >
    > soundmodem supports 1200 AFSK just fine. I use it at home.

    Yes, I believe that once you found out the right settings it will work not
    worse than a BayCom. But until you are at this stage, it is a very long and
    stony way to go....

    > > The fourth reason is that the (few) soundcard designs supposed to work with
    > > SoundModem are not available any more. That is because ISA cards are
    > > generally
    >
    > Yes this a real problem. Somebody needs to work on it; it's open source,
    > so it doesn't have to be Tom. Ideally, it would work with the
    > standard sound drivers (either OSS or ALSA).

    According to Thomas Sailer, there is a problem of those drivers not being
    capable of switching from playback to record/sample mode fast enough.
    It may also be not very easy to get FSK RX/TX filters as well as other signal
    processing "goodies" working with them.
    At least those were the reasons for Thomas Sailer why he decided to write a
    separate SoundModem driver.

    Cheers

    Gerd

    -- 
    Gerd Roethig
    Universität Leipzig, Medizinische Klinik u. PK I
    Johannisallee 32, 04103 Leipzig
    Tel. (0341) 97 12622, Fax (0341) 97 12515
    



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