asterisk users - Mar 2016 - Is possible to use FXO Digium card like a Fax modem?

Hi!

Is possible to use X100p TDM400P, Tdm410p, Tdm400, A400p, Ax400p or
any others digium card FXO for use Fax modem?

Thanks.

On Wednesday 30 Mar 2016, Vitor Mazuco wrote:
> Hi!
> 
> Is possible to use X100p TDM400P, Tdm410p, Tdm400, A400p, Ax400p or
> any others digium card FXO for use Fax modem?
Yes, in theory it is entirely possible to use an FXO card driven by software 
as a modem  (and indeed, this is exactly what Winmodems do);  although you 
will have to do all the hard work of generating the outgoing tones, and 
decoding the incoming tones, yourself.  This is a highly non-trivial task, and 
there is almost certain to be a better way than this of achieving whatever you 
want.


-- 
AJS

Note:  Originating address only accepts e-mail from list!  If replying off-
list, change address to asterisk1list at earthshod dot co dot uk .

Humm thanks for your reply,

Do you know whats is step for I can transform this card link a fax modem?

2016-03-30 9:36 GMT-03:00, A J Stiles <asterisk_list at
earthshod.co.uk>:
> On Wednesday 30 Mar 2016, Vitor Mazuco wrote:
>> Hi!
>>
>> Is possible to use X100p TDM400P, Tdm410p, Tdm400, A400p, Ax400p or
>> any others digium card FXO for use Fax modem?
>
> Yes, in theory it is entirely possible to use an FXO card driven by
software
>
> as a modem  (and indeed, this is exactly what Winmodems do);  although you
> will have to do all the hard work of generating the outgoing tones, and
> decoding the incoming tones, yourself.  This is a highly non-trivial task,
> and
> there is almost certain to be a better way than this of achieving whatever
> you
> want.
>
>
> --
> AJS
>
> Note:  Originating address only accepts e-mail from list!  If replying off-
> list, change address to asterisk1list at earthshod dot co dot uk .
>
> --
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On Wed, Mar 30, 2016 at 6:36 AM, A J Stiles <asterisk_list at
earthshod.co.uk>
wrote:
> On Wednesday 30 Mar 2016, Vitor Mazuco wrote:
>
> > Is possible to use X100p TDM400P, Tdm410p, Tdm400, A400p, Ax400p or
> > any others digium card FXO for use Fax modem?
>
> Yes, in theory it is entirely possible to use an FXO card driven by
> software
> as a modem  (and indeed, this is exactly what Winmodems do);  although you
> will have to do all the hard work

There are also cheap USB fax modems that you can attach to an FXO port and
that works fine. All you have to do then is configure asterisk to detect
incoming faxes and route them to that port (faxdetect=yes?).

This worked great for me when I had all my incoming calls coming over a
Century Link POTS line. As I approach retirement and want to save money, I
switched from the $44/month POTS line to a pennies-per-month VOIP service
via IAX registration. So now I'm wondering whether this setup would still
work. The question undoubtedly shows my ignorance of telephony stuff. I'm
willing to do my homework, I just want to know if it's even possible to do
this, or if there are better ways to handle fax over VOIP.

--Greg
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On Wed, Mar 30, 2016 at 01:36:16PM +0100, A J Stiles
wrote:
> On Wednesday 30 Mar 2016, Vitor Mazuco wrote:
> > Hi!
> > 
> > Is possible to use X100p TDM400P, Tdm410p, Tdm400, A400p, Ax400p or
> > any others digium card FXO for use Fax modem?
> 
> Yes, in theory it is entirely possible to use an FXO card driven by
software
> as a modem  (and indeed, this is exactly what Winmodems do);  although you 
> will have to do all the hard work of generating the outgoing tones, and 
> decoding the incoming tones, yourself.  This is a highly non-trivial task,
and
> there is almost certain to be a better way than this of achieving whatever
you
> want.
With the sole exception of the X100P, which, IIRC, was basically an
existing fax/modem card. If you dig deep enough you may find existing
drivers for it.

Assuming what is now called X100P is close enough to what was originally
that modem.

-- 
               Tzafrir Cohen
icq#16849755              jabber:tzafrir.cohen at xorcom.com
+972-50-7952406           mailto:tzafrir.cohen at xorcom.com
http://www.xorcom.com

On 03/30/2016 08:23 PM, Vitor Mazuco wrote:
> Hi!
>
> Is possible to use X100p TDM400P, Tdm410p, Tdm400, A400p, Ax400p or
> any others digium card FXO for use Fax modem?
>
> Thanks.
>
Asterisk + iaxmodem gives you a bunch of soft FAX modems. Add one of the 
analogue PSTN interface cards you listed and you have a multi-channel 
PSTN connected FAX modem. This arrangement is widely used with HylaFAX, 
although people do use it with other FAX software, such as the stuff 
built into Windows (using ethernet virtual terminals to connect the 
windows box to the linux box).

Regards,
Steve