[asterisk-users] Using voice modem as poor man's FXO in Asterisk 1.8

[asterisk asterisk]

HI,

My understanding is that the modem won't work. I believe asterisk does not
support.

I wonder why you do not have the built in ethernet in your motherboard. You
can spare your PCI slot for a proper FXO card and use USB-to-ethernet

For a PCI FXO card, the cheapest will be X100 but be aware of the quality
and compatibility. Or a better choice will be  TDM400

Other alternative:
Get a USB-FXO from Sangoma, expensive
Get a working SPA3000 as FXO --- cheapest I believe
Get a OBi100, out of stock at the moment. I also want to try

Hope this is of help to you

CK



On Mon, Feb 28, 2011 at 10:12 AM, Stuart Longland <redhatter at gentoo.org>wrote:

> Hi all,
>
> I've tried researching this, and so far, have struggled to find any
> contemporary information on the issue, so I do apologise if asking this
> irritates people who have answered this before.
>
> I have managed to set up Asterisk 1.8 on the web server here.  I have
> two softphones (Ekiga) able to communicate with it.  So far so good.
> I'm now curious to see if I can link it with the PSTN phone line here.
>
> The web server in question is an Intel Atom system with a Mini-ITX
> motherboard.  Its one and only PCI slot is occupied by a PCI ethernet
> card.  So FXO card is not an option even if it were within budget.
>
> My options therefore look to be an external FXO device of some
> description (Ethernet or USB), or to use a voice modem.  I fear external
> FXOs are going to be even more expensive than internal FXO cards.
>
> Now, I have here an old Maestro JetStream 56k modem here that does
> amongst other things, voice comms, and I have used it in the past as a
> telephone by plugging a headset into the front of it (and it was full
> duplex too if I recall correctly).  I have also used it as an answering
> machine, with the audio being transmitted digitally over the RS232
> link.  So that to me suggests it is possible to get audio in to and out
> of the modem, either via a sound card or using the serial port.  The web
> server has a sound card too (hard not to buy a motherboard with one
> these days).
>
> Apart from the lack of any hardware signal processing, it seems all the
> components are there.  The server isn't particularly heavily loaded, and
> thus I see no reason why the machine wouldn't theoretically be able to
> handle the DSP in software … I've seen lesser hardware do quite
> sophisticated DSP in real-time.
>
> Now, I've hunted high and low for where this is configured.  Some
> mailing list threads point me to the nonexistant
> /etc/asterisk/modems.conf.  One points me to /etc/asterisk/phone.conf,
> but nothing there jumps out at me as being an obvious means for
> configuring a modem — nor can I find where it's documented on the
> Asterisk wiki.
>
> Where abouts should I look for documentation on configuring these modules?
>
> Regards,
> --
> Stuart Longland (aka Redhatter, VK4MSL)      .'''.
> Gentoo Linux/MIPS Cobalt and Docs Developer  '.'` :
> . . . . . . . . . . . . . . . . . . . . . .   .'.'
> http://dev.gentoo.org/~redhatter             :.'
>
> I haven't lost my mind...
>  ...it's backed up on a tape somewhere.
>
>
> --
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