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I want to communicate to another BBS or FAX system over VoIP without
relying on an ATA. This should be possible with a soundcard or a DSP
which a soundcard is anyways.

The virtual modems out there are for translating COM/Serial
communications to IP traffic. Not VoIP traffic because it needs to
refeed over the POTS network. I know exactly what I'm looking for and
there is nothing on google like this.

You're missing the point entirely.

Speaking purely in hardware:
The IBM Mwave is a general purpose DSP for desktop and laptop
computers.
The system programs the DSP to either be a sound card or a modem but
not both. The circuitry routes it appropriately to an Telephone
Interface or Soundcard ports.

No I'm not talking about using the ethernet card as a modem. Kinda
pointless since it uses IP. What I'm talking about is using the
soundcard to belch out the beeps and screeches that a modem
communicates with into a VoIP channel and spit out on the far side's
modem/fax through POTS connection on their end (not mine as I want the
software to do it).

And in your last case, your absolutely wrong. If you want to use a fax
or modem, you at this time would connect it into the ATA and the call
is routed over VoIP to the destination. That is NOT what a ethernet
card is for.

Can't be a winmodem although it works on the same premise. A winmodem
uses a GP DSP with telephone connections attached to the DSP. However,
the problem is that the DSP only talks to the telephone interface, not
the soundcard ergo does not work... unless you know of a way to reroute
a modem back into a soundcard.

I'm speaking entirely in software... like a voice changer but emulating
DTMF and even 24/96 baud would suffice to start (slow but a start.)

A modem modulates and demodulates digital signals to a telephone
interface.
An ATA converts telephone signals into a digital packet for IP
traversal.
Neither is the same. That is what the salesman tells you but not how
it really works.

An ATA is not a modem. It simply translate Telephone Line Signal to a
digital packet for VoIP transmission.

<> wrote:
> No I'm not talking about using the ethernet card as a modem. Kinda
> pointless since it uses IP. What I'm talking about is using the
> soundcard to belch out the beeps and screeches that a modem
> communicates with into a VoIP channel and spit out on the far side's
> modem/fax through POTS connection on their end (not mine as I want the
> software to do it).

There is not a lot of tolerance for erratic timing on the analog side of a
modem connection. VoIP technology is really optimized around the particular
flavors of tolerance that humans - and not modems - have for lossy
transmission. You will be fighting an uphill battle. I'd be surprised if you
could get this working at 9600bps.

Why not instead just use the remote modem's native modemming powers and pipe
the serial data over TCP/IP? It's easy, it's reliable, and there's lots of
software for it.

miguel
--
Hit The Road! Photos from 35 countries on 5 continents: http://travel.u.nu
Latest photos: Malaysia, Israel, Palestine, Austria, Thailand

writes:

>I want to communicate to another BBS or FAX system over VoIP without
>relying on an ATA. This should be possible with a soundcard or a DSP
>which a soundcard is anyways.

You just want to use the soundcard for the DSP, right? That's because
your host machine is not fast enough to run the CODEC or is there
another issue? (You're not thinking of connecting anything to the
sound card, are you?)

--kyler

writes:

>An ATA is not a modem. It simply translate Telephone Line Signal to a
>digital packet for VoIP transmission.

Yes, of course. A modem modulates and demodulates data between analog
and digital representations and an ATA...uh...wait...tell me the
difference again?

--kyler

> You're missing the point entirely.

If that's the case then it's only because of your descriptions of the
situation.

What's the fixation on the MWave and DSPs? While chips of it's nature have
a range of features not all of them are worth bothering with. Especially
given the incredibly low cost of ready-made VOIP devices.

Just what is it you want to do? What source of audio and what destination?

> And in your last case, your absolutely wrong. If you want to use a fax
> or modem, you at this time would connect it into the ATA and the call
> is routed over VoIP to the destination. That is NOT what a ethernet
> card is for.

You're mixing examples and I'm certainly correct in what I posted. It's
apparent you're not effectively describing what you want to do. Given how
you've described it thus far, however, it seems like a waste of time and
effort.