Carlos E. R. wrote:
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The Friday 2008-02-01 at 20:51 -0500, Aaron Kulkis wrote:
I have, in the past, had problems several times with modems that required special software to work, and in all cases they were internal modems.
Those aren't actually modems...they're primitive sound cards combined with software which emulates a real modem. A real modem being defined as one which does the job with nothing more than analog circuits, A/D + D/A converters, and the only digital logic circuits being the the 4 registers (input, output, control, and status) plus associated "glue logic"
Not always.
Sometimes they are modems, but the error detection/correction logic is done by the driver and main cpu, instead of some kind of cpu in the modem.
A true modem doesn't have an on-board CPU. Not even 56k modems using frequency, amplitude, and phase shifting. There are hybrid digital/analog ICs (integrated circuits) which dothis right from the factory, needing only connectivity to power, a few external discreet elements (resistors, capacitors and/or crystals. They're generally more expensive than the DSP (Digital Signal Processor) + A/D + D/A solution, BUT they have the advantage of not needing any "driver" software, and so will be useable 50 years from now, as long as you can hook up to a serial port, or rig up the pin-outs to whatever a serial port will look like when that time comes.
Any "modem" with a DSP chip on it is NOT a real modem.
I wouldn't go as far as that.
I would try minicom. But I trust that if wvdial can not use it, there are serious problems. That's a very good program, I use it with preference to kinternet and such to really know what is happening with the connection.
The reason I suggest catting to it directly is that the capabilities of the modem can be tested directly.
My guess is that he probably didn't specify the correct /dev file.
Improbable.
Wvdial connects the first time, and fails on the second one.
- -- Cheers, Carlos E. R. -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.4-svn0 (GNU/Linux)
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