[asterisk-users] Faxes

[Nasir Iqbal]

Try open souce solution "ICTFAX"  for T.38 faxing developed by us  available
at http://www.sourceforge.net/projects/ictfax


Nasir Iqbal

ICT Innovations
http://www.ictinnovations.com/



On Sat, Sep 4, 2010 at 3:03 AM, Joel Maslak <jmaslak at antelope.net> wrote:

> g711 across a network without perfect jitter/delay characteristics will not
> work.
>
> You cannot do g711 faxing across the internet - at all.
>
> It's not a perfect solution even in an office on a dedicated LAN
> environment (you'll still get failed faxes).
>
>
> On Fri, Sep 3, 2010 at 12:32 PM, dave george <dgeorge at teletoneinc.com>wrote:
>
>> Thanks Kevin,
>>
>> I tried passing it over VOIP using g711U codecs with no success.  I will
>> try
>> using the patches that you mentioned and post the results.
>>
>> Thanks,
>> Dave
>>
>>
>> -----Original Message-----
>> From: asterisk-users-bounces at lists.digium.com
>> [mailto:asterisk-users-bounces at lists.digium.com] On Behalf Of Kevin P.
>> Fleming
>> Sent: Friday, September 03, 2010 2:17 PM
>> To: asterisk-users at lists.digium.com
>> Subject: Re: [asterisk-users] Faxes
>>
>> On 09/03/2010 10:50 AM, dave george wrote:
>> > The asterisk box is connected to the PSTN using TE410 cards.  Asterisk
>> talk
>> > SS7 to the PSTN.  On the IP side I use SIP.  I terminate calls onto the
>> > PSTN.
>> >
>> > The carrier sending the calls wants me to be able to pass faxes to
>> physical
>> > fax machines on the PSTN.  So far they are failing.
>> >
>> > We just want ot be able to pass faxes using g711u or t.38 pass through.
>>
>> As I told you on the asterisk-ss7 list, you can't 'pass through' T.38,
>> because the PSTN does not speak T.38. If one side of the call is SIP,
>> and the other side is TDM, then you have only two choices: pass the call
>> through in audio mode (FAX over VoIP), or act as a T.38 gateway (FAX
>> over T.38).
>>
>> At this time, the only option without patching Asterisk is to pass the
>> call through in audio mode, but there are many, many problems with doing
>> FAX over VoIP (Steve Underwood's page on the soft-switch.org site
>> explains them very well).
>>
>> There are patches in the issue tracker at issues.asterisk.org to add
>> T.38 gateway functionality to various releases of Asterisk, and they
>> work well for quite a few people. If you added that, you'd be able to
>> act as a T.38 gateway, which would dramatically increase your chances of
>> success.
>>
>> --
>> Kevin P. Fleming
>> Digium, Inc. | Director of Software Technologies
>> 445 Jan Davis Drive NW - Huntsville, AL 35806 - USA
>> skype: kpfleming | jabber: kfleming at digium.com
>> Check us out at www.digium.com & www.asterisk.org
>>
>> --
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>
>
> --
> _____________________________________________________________________
> -- Bandwidth and Colocation Provided by http://www.api-digital.com --
> New to Asterisk? Join us for a live introductory webinar every Thurs:
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