<html>
<head>
<meta content="text/html; charset=windows-1252"
http-equiv="Content-Type">
</head>
<body bgcolor="#FFFFFF" text="#000000">
<div class="moz-cite-prefix">I have the same problem with a
freeswitch GIT version ~ 1 week old.<br>
A leg is a Patton resp. Hylafax via tty modem, B-leg is another
Patton. <br>
<br>
When the B leg offers T.38 by a reinvite:<br>
<ul>
<li>Freeswitch sends a "trying"</li>
<li>the Freeswitch console shows the B leg's SDP with T.38</li>
<li>Then nothing happens for ~30 sec</li>
<li>Then the B-leg cancels the request and the call is
terminated.<br>
</li>
</ul>
Grepping the network traffic I can see that Freeswitch will never
answer the Reinvite request. This also happens if a leg is T.30
(hylafax tty modem), so this is not a behaviour of forwarding the
t.38 SDP to the A-leg and waiting for an answer.<br>
<br>
I saw a similar behaviour in
<a class="moz-txt-link-freetext" href="http://jira.freeswitch.org/browse/FS-5181">http://jira.freeswitch.org/browse/FS-5181</a> but the solution there
was to fallback to T.30.<br>
<br>
Is there any solution so far or any hint how to overcome this?<br>
<br>
Best regards<br>
Peter<br>
<br>
<br>
<br>
On 06/02/11 19:57, Anthony Minessale wrote:<br>
</div>
<blockquote
cite="mid:BANLkTik6D=X7OcwySX5g2Xyoc99tqiazVQ@mail.gmail.com"
type="cite">
<pre wrap="">start by proving them and post them in a jira with full console traces
with sofia global siptrace on and pcaps etc
then wait for us to get to them or email <a class="moz-txt-link-abbreviated" href="mailto:consulting@freeswitch.org">consulting@freeswitch.org</a> for
expedition
On Wed, May 25, 2011 at 11:56 AM, Rob Morin <a class="moz-txt-link-rfc2396E" href="mailto:rmorin@blie-ent.com"><rmorin@blie-ent.com></a> wrote:
</pre>
<blockquote type="cite">
<pre wrap="">Thank you.
So, I believe that there are two potential problems, fixing either of which
will allow me to send faxes.
1. When T.38 is enabled in passthrough mode and the B leg offers T.38,
Freeswitch needs to forward the invite and the responses. Currently it isn’t
forwarding the response back to the B leg.
2. When T.38 is not enabled and the B leg offers T.38, Freeswitch
needs to respond with a 488 indicating T.38 is not acceptable. Currently it
doesn’t respond at all.
How would I go about making or requesting these fixes?
Thank you,
Rob
From: David Ponzone [<a class="moz-txt-link-freetext" href="mailto:david.ponzone@ipeva.fr">mailto:david.ponzone@ipeva.fr</a>]
Sent: Wednesday, May 25, 2011 11:11 AM
To: FreeSWITCH Users Help
Subject: Re: [Freeswitch-users] Faxing problems if B leg offers T.38
Rob,
On my test box, I run a GIT from 05-02, and I don't have any issue.
But I just did the test, and the call flow is different from yours.
When I send a fax with my endpoint (Zoiper Softphone), I got the remote fax
tone, and then my Zoiper sends the T38-REINVITE, not the remote gateway.
So I guess there are 2 possible call flows, because I remember in some
circumstances, the remote sends the RE-INVITE.
David Ponzone Direction Technique
email: <a class="moz-txt-link-abbreviated" href="mailto:david.ponzone@ipeva.fr">david.ponzone@ipeva.fr</a>
tel: 01 74 03 18 97
gsm: 06 66 98 76 34
Service Client IPeva
tel: 0811 46 26 26
<a class="moz-txt-link-abbreviated" href="http://www.ipeva.fr">www.ipeva.fr</a> - <a class="moz-txt-link-abbreviated" href="http://www.ipeva-studio.com">www.ipeva-studio.com</a>
Ce message et toutes les pièces jointes sont confidentiels et établis à
l'intention exclusive de ses destinataires. Toute utilisation ou diffusion
non autorisée est interdite. Tout message électronique est susceptible
d'altération. IPeva décline toute responsabilité au titre de ce message s'il
a été altéré, déformé ou falsifié. Si vous n'êtes pas destinataire de ce
message, merci de le détruire immédiatement et d'avertir l'expéditeur.
Le 25/05/2011 à 13:18, Rob Morin a écrit :
Is the fact that I was previously running the snapshot from 25 March
adequate to meet this test?
From: Rob Morin [<a class="moz-txt-link-freetext" href="mailto:rmorin@blie-ent.com">mailto:rmorin@blie-ent.com</a>]
Sent: Tuesday, May 24, 2011 10:50 AM
To: 'FreeSWITCH Users Help'
Subject: Re: [Freeswitch-users] Faxing problems if B leg offers T.38
I can, if someone can tell me where to get the snapshot. I looked
at files.freeswitch.org and didn’t see one.
Prior to updating to the 5-17 snapshot, I was having the same problems with
the 3-25 snapshot that I was using.
Thank you,
Rob
From: David Ponzone [<a class="moz-txt-link-freetext" href="mailto:david.ponzone@ipeva.fr">mailto:david.ponzone@ipeva.fr</a>]
Sent: Tuesday, May 24, 2011 1:47 AM
To: FreeSWITCH Users Help
Subject: Re: [Freeswitch-users] Faxing problems if B leg offers T.38
Rob,
following Yehavi's comment, could you downgrade your GIT version to a
previous version, like one month old ?
David Ponzone Direction Technique
email: <a class="moz-txt-link-abbreviated" href="mailto:david.ponzone@ipeva.fr">david.ponzone@ipeva.fr</a>
tel: 01 74 03 18 97
gsm: 06 66 98 76 34
Service Client IPeva
tel: 0811 46 26 26
<a class="moz-txt-link-abbreviated" href="http://www.ipeva.fr">www.ipeva.fr</a> - <a class="moz-txt-link-abbreviated" href="http://www.ipeva-studio.com">www.ipeva-studio.com</a>
Ce message et toutes les pièces jointes sont confidentiels et établis à
l'intention exclusive de ses destinataires. Toute utilisation ou diffusion
non autorisée est interdite. Tout message électronique est susceptible
d'altération. IPeva décline toute responsabilité au titre de ce message s'il
a été altéré, déformé ou falsifié. Si vous n'êtes pas destinataire de ce
message, merci de le détruire immédiatement et d'avertir l'expéditeur.
Le 24/05/2011 à 02:59, Rob Morin a écrit :
David,
It isn’t the ATA. I’ve tried both the Grandstream HandyTone 502 and
Cisco/Linksys SPA 2102. Same story in both cases.
I had my carrier help me troubleshoot and we can see the SIP request from
the carrier come in. When T.38 is enabled, it is forwarded to the A leg, but
the response from the A leg isn’t forwarded back to the B leg. I can produce
traces that show this.
When T.38 isn’t enabled, the B leg is sending a T.38 reinvite. FS doesn’t
respond or forward it. So the connection dies. I have every reason to
believe that I’d be able to send the fax if FS would respond with a 488
indicating T.38 is not acceptable. But instead, all I get is silence. Again,
I can produce traces that demonstrate this.
There’s another similar email trail out
there, <a class="moz-txt-link-freetext" href="http://freeswitch-users.2379917.n2.nabble.com/T-38-via-UPDATE-request-td3821994.html">http://freeswitch-users.2379917.n2.nabble.com/T-38-via-UPDATE-request-td3821994.html</a>,
but I’m not certain that they’re related.
Thank you for your help!
Rob
From: David Ponzone [<a class="moz-txt-link-freetext" href="mailto:david.ponzone@ipeva.fr">mailto:david.ponzone@ipeva.fr</a>]
Sent: Monday, May 23, 2011 6:11 PM
To: FreeSWITCH Users Help
Subject: Re: [Freeswitch-users] Faxing problems if B leg offers T.38
Rob,
perhaps you should not consider T38 is 100% interoperable.
You may tell us what ATA is that, because some of them are nice piece of
junk.
David Ponzone Direction Technique
email: <a class="moz-txt-link-abbreviated" href="mailto:david.ponzone@ipeva.fr">david.ponzone@ipeva.fr</a>
tel: 01 74 03 18 97
gsm: 06 66 98 76 34
Service Client IPeva
tel: 0811 46 26 26
<a class="moz-txt-link-abbreviated" href="http://www.ipeva.fr">www.ipeva.fr</a> - <a class="moz-txt-link-abbreviated" href="http://www.ipeva-studio.com">www.ipeva-studio.com</a>
Ce message et toutes les pièces jointes sont confidentiels et établis à
l'intention exclusive de ses destinataires. Toute utilisation ou diffusion
non autorisée est interdite. Tout message électronique est susceptible
d'altération. IPeva décline toute responsabilité au titre de ce message s'il
a été altéré, déformé ou falsifié. Si vous n'êtes pas destinataire de ce
message, merci de le détruire immédiatement et d'avertir l'expéditeur.
Le 23/05/2011 à 20:51, Rob Morin a écrit :
I’m having problems faxing if the B leg offers T.38. Several scenarios, but
always the same result.
First, the architecture
FAX à ATA (T.38 optional) à FS à Carrier à Destination (Possibly another
carrier (PSTN) and the fax machine)
On my ATA, T.38 is enabled (Auto Detect).
If the destination supports T.38, the Carrier will offer it to Freeswitch.
If the Destination doesn’t support T.38, the B leg doesn’t offer it and the
faxes go through.
I’ve set Freeswitch as:
<action application="set" data="fax_enable_t38=true"/>
<action application="export" data="t38_passthru=true"/>
When that’s the case, and the B leg offers T.38, Freeswitch passes through
the offer and the ATA responds, 3 times. But the response never gets sent to
the B leg, so it terminates the call after about 30 seconds.
When I set Freeswitch as:
<action application="set" data="fax_enable_t38=false"/>
The B leg still offers T.38 if its other side is capable. Freeswitch doesn’t
pass the offer through and the B leg terminates the call after about 30
seconds.
I’m running on a recent git ( FreeSWITCH Version 1.0.head (git-86d757d
2011-05-17 22-51-47 -0500) ).
I’ve had no success attempting to configure FS as a gateway. Frankly, T.38
“passthrough” has had the most success, mostly when the other ends aren’t
T.38 capable and it stays in G711u.
Is there something else I need to do to enable T.38 in passthrough mode?
Thank you,
Rob Morin
PS – I can provide tcpdumps of this, or whatever else is necessary.
_______________________________________________
FreeSWITCH-users mailing list
<a class="moz-txt-link-abbreviated" href="mailto:FreeSWITCH-users@lists.freeswitch.org">FreeSWITCH-users@lists.freeswitch.org</a>
<a class="moz-txt-link-freetext" href="http://lists.freeswitch.org/mailman/listinfo/freeswitch-users">http://lists.freeswitch.org/mailman/listinfo/freeswitch-users</a>
UNSUBSCRIBE:<a class="moz-txt-link-freetext" href="http://lists.freeswitch.org/mailman/options/freeswitch-users">http://lists.freeswitch.org/mailman/options/freeswitch-users</a>
<a class="moz-txt-link-freetext" href="http://www.freeswitch.org">http://www.freeswitch.org</a>
_______________________________________________
FreeSWITCH-users mailing list
<a class="moz-txt-link-abbreviated" href="mailto:FreeSWITCH-users@lists.freeswitch.org">FreeSWITCH-users@lists.freeswitch.org</a>
<a class="moz-txt-link-freetext" href="http://lists.freeswitch.org/mailman/listinfo/freeswitch-users">http://lists.freeswitch.org/mailman/listinfo/freeswitch-users</a>
UNSUBSCRIBE:<a class="moz-txt-link-freetext" href="http://lists.freeswitch.org/mailman/options/freeswitch-users">http://lists.freeswitch.org/mailman/options/freeswitch-users</a>
<a class="moz-txt-link-freetext" href="http://www.freeswitch.org">http://www.freeswitch.org</a>
_______________________________________________
FreeSWITCH-users mailing list
<a class="moz-txt-link-abbreviated" href="mailto:FreeSWITCH-users@lists.freeswitch.org">FreeSWITCH-users@lists.freeswitch.org</a>
<a class="moz-txt-link-freetext" href="http://lists.freeswitch.org/mailman/listinfo/freeswitch-users">http://lists.freeswitch.org/mailman/listinfo/freeswitch-users</a>
UNSUBSCRIBE:<a class="moz-txt-link-freetext" href="http://lists.freeswitch.org/mailman/options/freeswitch-users">http://lists.freeswitch.org/mailman/options/freeswitch-users</a>
<a class="moz-txt-link-freetext" href="http://www.freeswitch.org">http://www.freeswitch.org</a>
_______________________________________________
FreeSWITCH-users mailing list
<a class="moz-txt-link-abbreviated" href="mailto:FreeSWITCH-users@lists.freeswitch.org">FreeSWITCH-users@lists.freeswitch.org</a>
<a class="moz-txt-link-freetext" href="http://lists.freeswitch.org/mailman/listinfo/freeswitch-users">http://lists.freeswitch.org/mailman/listinfo/freeswitch-users</a>
UNSUBSCRIBE:<a class="moz-txt-link-freetext" href="http://lists.freeswitch.org/mailman/options/freeswitch-users">http://lists.freeswitch.org/mailman/options/freeswitch-users</a>
<a class="moz-txt-link-freetext" href="http://www.freeswitch.org">http://www.freeswitch.org</a>
</pre>
</blockquote>
<pre wrap="">
</pre>
</blockquote>
<br>
<br>
<pre class="moz-signature" cols="72">--
With kind regards
Peter Steinbach
Telefaks Services GmbH
<a class="moz-txt-link-freetext" href="mailto:lists">mailto:lists</a> (att) telefaks.de
Internet: <a class="moz-txt-link-abbreviated" href="http://www.telefaks.de">www.telefaks.de</a>
</pre>
</body>
</html>