[Freeswitch-users] FAX problems

[João Mesquita]

>From what I read, you need com0com compiled on Linux as well. So you do
COM->IP on Windows and IP->TTY on Linux.

João Mesquita
FreeSWITCH™ Solutions


On Wed, Jan 16, 2013 at 1:06 PM, Seven Du <dujinfang at gmail.com> wrote:

> Hi Dave,
>
> Thanks for this info. Can you explain a little more detail about the TCP
> pipe? I can see SpanDSP create a /dev/FS0 on linux, but how to pipe a TCP
> connection to linux on Windows? Does SpanDSP also listen on a TCP port?  Or
> need other software to map a TCP port to /dev/FS0?
>
> Thanks.
>
> On Wednesday, January 16, 2013 at 10:52 AM, Dave R. Kompel wrote:
>
>  In FreeSWITCH, mod_spandsp, will also emulate fax modems. Com0Com is
> like a PTY driver for windows. When you set modem_count in spandsp.conf.xml
> to a count other then 0, the windows implmentation starts at COM3. So to
> get T.38 emulated fax modems, you don't need anything other then
> FreeSWITCH.
>
> Another option would be on the Linux box, enable SPANDSP modems, and use
> com0com on windows to backup com ports to raw TCP connections. It supports
> both. That way it would talk over a TCP pipe to an emulated modem on your
> other FreeSWITCH box.
>
> --Dave
>
> ------------------------------
> *From:* Steven Schoch [mailto:schoch+freeswitch.org at xwin32.com<schoch+freeswitch.org at xwin32.com>
> ]
> *To:* FreeSWITCH Users Help [mailto:freeswitch-users at lists.freeswitch.org<freeswitch-users at lists.freeswitch.org>
> ]
> *Sent:* Tue, 15 Jan 2013 16:39:15 -0800
> *Subject:* Re: [Freeswitch-users] FAX problems
>
>  My whole plan here is to replace the phone system currently in the
> office (a NexPath system, a really nice PC-chassis pbx system from the
> 1990's) to a more modern VoIP system, and git rid of all our POTS lines.
>  But I need a simple solution for the users who send FAXes from their
> Windows systems.
>
> On Tue, Jan 15, 2013 at 10:48 AM, Dave R. Kompel <drk at drkngs.net> wrote:
>
> **
> It seems that you may be debugging way too many things at once. Do you
> know much about the FAXBACK.COM <http://faxback.com/> internals?
>
>
> Yes, that's probably correct.  No, I don't know much about faxback.com.
>
> However, I just tried a different one, www.t38faxvoip.com.  It's a much
> more involved Windows installation, but it came up with the same symptoms.
>  This is leading me to believe that the problem is more likely my FS
> configuration.
>
>  Just for a test you know you can bypass it. FreeSWITCH will work just
> fine on a windows box, using the FAXModem stuff, and com0com driver.
>
>
> That's not my objective.  I'm still early in the learning process for
> FreeSwitch, and I'd like to keep it to one installation, on an OS that I
> can understand (Linux).
>
>  That's what I use to have the M$ fax service talk to, and it works
> great. No hardware, and FS doing T38 right out of the Fax Service Server.
>
>
> Let me see if I understand:  MS Fax is talking through a virtual serial
> cable (com0com) to what it thinks is a FAX modem.  On the other side of
> that virtual serial cable is something that takes the serial FAX data,
> translates it to T38, and injects it into FS.  I'm a little unclear on the
> last 2 pieces, because it still sounds like a black box to me.  What's "Fax
> Service Server"?
>
>
> On Mon, Jan 14, 2013 at 5:12 PM, Michael Collins <msc at freeswitch.org>
>  wrote:
>
> Also, are you routing the call to the txfax app?
>
>
> I'm not.  I assumed that the purpose of txfax is to encode a TIFF file
> into a T.38 stream, and my source is already T.38.  Am I missing something?
>
> --
> Steve
>
>
>
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