<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" xmlns="http://www.w3.org/TR/REC-html40"><head><meta http-equiv=Content-Type content="text/html; charset=iso-8859-1"><meta name=Generator content="Microsoft Word 14 (filtered medium)"><base href="x-msg://518/"><style><!--
/* Font Definitions */
@font-face
{font-family:Helvetica;
panose-1:2 11 6 4 2 2 2 2 2 4;}
@font-face
{font-family:Wingdings;
panose-1:5 0 0 0 0 0 0 0 0 0;}
@font-face
{font-family:Wingdings;
panose-1:5 0 0 0 0 0 0 0 0 0;}
@font-face
{font-family:Calibri;
panose-1:2 15 5 2 2 2 4 3 2 4;}
@font-face
{font-family:Tahoma;
panose-1:2 11 6 4 3 5 4 4 2 4;}
@font-face
{font-family:"\0027Helvetica Neue\0027";
panose-1:0 0 0 0 0 0 0 0 0 0;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0in;
margin-bottom:.0001pt;
font-size:12.0pt;
font-family:"Times New Roman","serif";}
a:link, span.MsoHyperlink
{mso-style-priority:99;
color:blue;
text-decoration:underline;}
a:visited, span.MsoHyperlinkFollowed
{mso-style-priority:99;
color:purple;
text-decoration:underline;}
span.apple-style-span
{mso-style-name:apple-style-span;}
span.apple-converted-space
{mso-style-name:apple-converted-space;}
span.EmailStyle19
{mso-style-type:personal-reply;
font-family:"Calibri","sans-serif";
color:#1F497D;}
.MsoChpDefault
{mso-style-type:export-only;
font-size:10.0pt;}
@page WordSection1
{size:8.5in 11.0in;
margin:1.0in 1.0in 1.0in 1.0in;}
div.WordSection1
{page:WordSection1;}
--></style><!--[if gte mso 9]><xml>
<o:shapedefaults v:ext="edit" spidmax="1026" />
</xml><![endif]--><!--[if gte mso 9]><xml>
<o:shapelayout v:ext="edit">
<o:idmap v:ext="edit" data="1" />
</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>David,<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>It isn’t the ATA. I’ve tried both the Grandstream HandyTone 502 and Cisco/Linksys SPA 2102. Same story in both cases.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>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. <o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>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.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>There’s another similar email trail out there, <a 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.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Thank you for your help!<br>Rob <o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><div><div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'><p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> David Ponzone [mailto:david.ponzone@ipeva.fr] <br><b>Sent:</b> Monday, May 23, 2011 6:11 PM<br><b>To:</b> FreeSWITCH Users Help<br><b>Subject:</b> Re: [Freeswitch-users] Faxing problems if B leg offers T.38<o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Rob,<o:p></o:p></p><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>perhaps you should not consider T38 is 100% interoperable.<o:p></o:p></p></div><div><p class=MsoNormal>You may tell us what ATA is that, because some of them are nice piece of junk.<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p><div><div><div><p class=MsoNormal><span style='font-size:10.5pt;font-family:"'Helvetica Neue'","serif";color:#1C00FF'>David Ponzone </span><span class=apple-style-span><span style='font-size:9.0pt;font-family:"'Helvetica Neue'","serif";color:black'>Direction Technique</span></span><span style='font-size:10.5pt;font-family:"Helvetica","sans-serif";color:black'><o:p></o:p></span></p></div><div><p class=MsoNormal><span class=apple-style-span><span style='font-size:10.0pt;font-family:"'Helvetica Neue'","serif";color:black'>email: <a href="mailto:david.ponzone@ipeva.fr">david.ponzone@ipeva.fr</a></span></span><span style='font-size:10.5pt;font-family:"Helvetica","sans-serif";color:black'><o:p></o:p></span></p></div><div><p class=MsoNormal><span class=apple-style-span><span style='font-size:10.0pt;font-family:"'Helvetica Neue'","serif";color:black'>tel: 01 74 03 18 97</span></span><span style='font-size:10.5pt;font-family:"Helvetica","sans-serif";color:black'><o:p></o:p></span></p></div><div><p class=MsoNormal><span class=apple-style-span><span style='font-size:10.0pt;font-family:"'Helvetica Neue'","serif";color:black'>gsm: 06 66 98 76 34</span></span><span style='font-size:10.5pt;font-family:"Helvetica","sans-serif";color:black'><o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:10.5pt;font-family:"Helvetica","sans-serif";color:black'><o:p> </o:p></span></p></div><div><p class=MsoNormal><span style='font-size:10.5pt;font-family:"'Helvetica Neue'","serif";color:#1C00FF'>Service Client<span class=apple-converted-space> </span></span><span style='font-size:10.5pt;font-family:"'Helvetica Neue'","serif";color:red'>IP</span><span style='font-size:10.5pt;font-family:"'Helvetica Neue'","serif";color:#1C00FF'>eva</span><span style='font-size:10.5pt;font-family:"Helvetica","sans-serif";color:black'><o:p></o:p></span></p></div><div><div><p class=MsoNormal><span class=apple-style-span><span style='font-size:10.0pt;font-family:"'Helvetica Neue'","serif";color:black'>tel: 0811 46 26 26</span></span><span style='font-size:10.5pt;font-family:"Helvetica","sans-serif";color:black'><o:p></o:p></span></p></div><div><div><p class=MsoNormal><u><span style='font-size:7.5pt;font-family:"Arial","sans-serif";color:#0022F3'><a href="BLOCKED::http://www.ipeva.fr/">www.ipeva.fr</a></span></u><span style='font-size:7.5pt;font-family:"Arial","sans-serif";color:#656895'> - </span><u><span style='font-size:7.5pt;font-family:"Arial","sans-serif";color:#0022F3'><a href="BLOCKED::http://www.ipeva-studio.com/">www.ipeva-studio.com</a></span></u><span style='font-size:7.5pt;font-family:"Arial","sans-serif";color:#0022F3'><o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:7.5pt;font-family:"Arial","sans-serif";color:#0022F3'><o:p> </o:p></span></p></div><div><p class=MsoNormal style='text-align:justify'><i><span style='font-size:7.5pt;font-family:"Arial","sans-serif";color:silver'>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. <b>IPeva</b> 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.</span></i><span style='font-size:7.5pt;font-family:"Arial","sans-serif";color:silver'><o:p></o:p></span></p><p class=MsoNormal style='text-align:justify'><u><span style='font-size:7.5pt;font-family:"Arial","sans-serif";color:#0022F3'><o:p><span style='text-decoration:none'> </span></o:p></span></u></p></div></div></div></div><p class=MsoNormal><span style='font-size:10.5pt;font-family:"Helvetica","sans-serif";color:black'><br><br></span><o:p></o:p></p></div><p class=MsoNormal><o:p> </o:p></p><div><div><p class=MsoNormal>Le 23/05/2011 à 20:51, Rob Morin a écrit :<o:p></o:p></p></div><p class=MsoNormal><br><br><o:p></o:p></p><div><div><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'>I’m having problems faxing if the B leg offers T.38. Several scenarios, but always the same result.<o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'> <o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'>First, the architecture<o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'> <o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'>FAX<span class=apple-converted-space> </span></span><span style='font-size:11.0pt;font-family:Wingdings'>à</span><span class=apple-converted-space><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'> </span></span><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'>ATA (T.38 optional)<span class=apple-converted-space> </span></span><span style='font-size:11.0pt;font-family:Wingdings'>à</span><span class=apple-converted-space><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'> </span></span><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'>FS<span class=apple-converted-space> </span></span><span style='font-size:11.0pt;font-family:Wingdings'>à</span><span class=apple-converted-space><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'> </span></span><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'>Carrier <span class=apple-converted-space> </span></span><span style='font-size:11.0pt;font-family:Wingdings'>à</span><span class=apple-converted-space><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'> </span></span><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'>Destination (Possibly another carrier (PSTN) and the fax machine)<o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'> <o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'>On my ATA, T.38 is enabled (Auto Detect).<o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'> <o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'>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.<o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'> <o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'>I’ve set Freeswitch as:<o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'> <action application="set" data="fax_enable_t38=true"/><o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'> <action application="export" data="t38_passthru=true"/> <o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'>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.<o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'> <o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'>When I set Freeswitch as:<o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'> <action application="set" data="fax_enable_t38=false"/><o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'>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.<o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'> <o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'>I’m running on a recent git ( FreeSWITCH Version 1.0.head (git-86d757d 2011-05-17 22-51-47 -0500) ).<o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'> <o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'>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.<o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'> <o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'>Is there something else I need to do to enable T.38 in passthrough mode? <o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'> <o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'>Thank you,<br>Rob Morin<o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'> <o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'>PS – I can provide tcpdumps of this, or whatever else is necessary.<o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'> <o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'> <o:p></o:p></span></p></div><p class=MsoNormal><span style='font-size:13.5pt;font-family:"Helvetica","sans-serif"'>_______________________________________________<br>FreeSWITCH-users mailing list<br><a href="mailto:FreeSWITCH-users@lists.freeswitch.org">FreeSWITCH-users@lists.freeswitch.org</a><br><a href="http://lists.freeswitch.org/mailman/listinfo/freeswitch-users">http://lists.freeswitch.org/mailman/listinfo/freeswitch-users</a><br>UNSUBSCRIBE:http://lists.freeswitch.org/mailman/options/freeswitch-users<br><a href="http://www.freeswitch.org">http://www.freeswitch.org</a><o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p></div></div></body></html>