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</o:shapelayout></xml><![endif]--></head><body bgcolor=white lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='color:#1F497D'>Thanks – and did you find a provider with T.38 DIDs? I don’t see many pay as you go providers with T.38<o:p></o:p></span></p><p class=MsoNormal><span style='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";color:windowtext'>From:</span></b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowtext'> asterisk-users-bounces@lists.digium.com [mailto:asterisk-users-bounces@lists.digium.com] <b>On Behalf Of </b>Larry Moore<br><b>Sent:</b> Monday, August 01, 2011 4:08 PM<br><b>To:</b> Asterisk Users Mailing List - Non-Commercial Discussion<br><b>Subject:</b> Re: [asterisk-users] T38 Fax<o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>On 2/08/2011 1:02 AM, Robert Huddleston wrote: <o:p></o:p></p><p class=MsoNormal>Anyone have any testing experience with T38 and HT-502 Grandstream?<o:p></o:p></p><p class=MsoNormal> <o:p></o:p></p><p class=MsoNormal>I just want to confirm that t.38 is working on this device.<o:p></o:p></p><p class=MsoNormal> <o:p></o:p></p><p class=MsoNormal>Thanks<o:p></o:p></p><p class=MsoNormal> <o:p></o:p></p><p class=MsoNormal> <o:p></o:p></p><p class=MsoNormal style='margin-bottom:12.0pt'><span style='font-size:12.0pt;font-family:"Times New Roman","serif"'><br>Yes, it works.<br><br>I currently have latest firmware installed and it still works in T.38. I am using UDP transport for this device as I seem to encounter problems with TCP or TLS.<br><br>I am currently running Asterisk 1.8.5.0.<o:p></o:p></span></p><table class=MsoNormalTable border=0 cellspacing=1 cellpadding=0 width="100%" style='width:100.0%'><tr><td style='padding:1.5pt 1.5pt 1.5pt 1.5pt'><p class=MsoNormal align=right style='text-align:right'><b><span style='font-size:12.0pt;font-family:"Times New Roman","serif"'>Product Model: </span></b><span style='font-size:12.0pt;font-family:"Times New Roman","serif"'><o:p></o:p></span></p></td><td style='padding:1.5pt 1.5pt 1.5pt 1.5pt'><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman","serif"'> HT-502 V1.1C <o:p></o:p></span></p></td></tr><tr><td style='padding:1.5pt 1.5pt 1.5pt 1.5pt'><p class=MsoNormal align=right style='text-align:right'><b><span style='font-size:12.0pt;font-family:"Times New Roman","serif"'>Software Version: </span></b><span style='font-size:12.0pt;font-family:"Times New Roman","serif"'><o:p></o:p></span></p></td><td style='padding:1.5pt 1.5pt 1.5pt 1.5pt'><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman","serif"'> Program-- 1.0.5.5 Bootloader-- 1.0.0.9 Core-- 1.0.5.2 Base-- 1.0.5.2<o:p></o:p></span></p></td></tr></table><p class=MsoNormal style='margin-bottom:12.0pt'><span style='font-size:12.0pt;font-family:"Times New Roman","serif"'><br>Some settings I have set and you may wish to check for the FXS port are;<o:p></o:p></span></p><table class=MsoNormalTable border=0 cellspacing=1 cellpadding=0 width="100%" style='width:100.0%'><tr><td style='padding:1.5pt 1.5pt 1.5pt 1.5pt'><p class=MsoNormal align=right style='text-align:right'><i><span style='font-size:12.0pt;font-family:"Times New Roman","serif"'>Force INVITE: </span></i><span style='font-size:12.0pt;font-family:"Times New Roman","serif"'><o:p></o:p></span></p></td><td style='padding:1.5pt 1.5pt 1.5pt 1.5pt'><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman","serif"'> (X) No ( ) Yes (Always refresh with INVITE instead of UPDATE)<o:p></o:p></span></p></td></tr><tr><td style='padding:1.5pt 1.5pt 1.5pt 1.5pt'><p class=MsoNormal align=right style='text-align:right'><i><span style='font-size:12.0pt;font-family:"Times New Roman","serif"'>Send Re-INVITE After Fax: </span></i><span style='font-size:12.0pt;font-family:"Times New Roman","serif"'><o:p></o:p></span></p></td><td style='padding:1.5pt 1.5pt 1.5pt 1.5pt'><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman","serif"'> ( ) No (X) Yes <o:p></o:p></span></p></td></tr></table><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman","serif"'><o:p> </o:p></span></p><table class=MsoNormalTable border=0 cellspacing=1 cellpadding=0 width="100%" style='width:100.0%'><tr><td style='padding:1.5pt 1.5pt 1.5pt 1.5pt'><p class=MsoNormal align=right style='text-align:right'><i><span style='font-size:12.0pt;font-family:"Times New Roman","serif"'>VAD: </span></i><span style='font-size:12.0pt;font-family:"Times New Roman","serif"'><o:p></o:p></span></p></td><td style='padding:1.5pt 1.5pt 1.5pt 1.5pt'><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman","serif"'> ( ) No (X) Yes <o:p></o:p></span></p></td></tr><tr><td style='padding:1.5pt 1.5pt 1.5pt 1.5pt'><p class=MsoNormal align=right style='text-align:right'><i><span style='font-size:12.0pt;font-family:"Times New Roman","serif"'>Symmetric RTP: </span></i><span style='font-size:12.0pt;font-family:"Times New Roman","serif"'><o:p></o:p></span></p></td><td style='padding:1.5pt 1.5pt 1.5pt 1.5pt'><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman","serif"'> (X) No ( ) Yes <o:p></o:p></span></p></td></tr><tr><td valign=top style='padding:1.5pt 1.5pt 1.5pt 1.5pt'><p class=MsoNormal align=right style='text-align:right'><i><span style='font-size:12.0pt;font-family:"Times New Roman","serif"'>Fax mode: </span></i><span style='font-size:12.0pt;font-family:"Times New Roman","serif"'><o:p></o:p></span></p></td><td style='padding:1.5pt 1.5pt 1.5pt 1.5pt'><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman","serif"'> (X) T.38 (Auto Detect) ( ) Pass-Through <o:p></o:p></span></p></td></tr><tr><td style='padding:1.5pt 1.5pt 1.5pt 1.5pt'><p class=MsoNormal align=right style='text-align:right'><i><span style='font-size:12.0pt;font-family:"Times New Roman","serif"'>Fax tone detection mode: </span></i><span style='font-size:12.0pt;font-family:"Times New Roman","serif"'><o:p></o:p></span></p></td><td style='padding:1.5pt 1.5pt 1.5pt 1.5pt'><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman","serif"'> ( ) Caller (X) Callee ( ) Caller or Callee<o:p></o:p></span></p></td></tr><tr><td valign=top style='padding:1.5pt 1.5pt 1.5pt 1.5pt'><p class=MsoNormal align=right style='text-align:right'><i><span style='font-size:12.0pt;font-family:"Times New Roman","serif"'>Jitter buffer type: </span></i><span style='font-size:12.0pt;font-family:"Times New Roman","serif"'><o:p></o:p></span></p></td><td style='padding:1.5pt 1.5pt 1.5pt 1.5pt'><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman","serif"'> (X) Fixed ( ) Adaptive <o:p></o:p></span></p></td></tr><tr><td valign=top style='padding:1.5pt 1.5pt 1.5pt 1.5pt'><p class=MsoNormal align=right style='text-align:right'><i><span style='font-size:12.0pt;font-family:"Times New Roman","serif"'>Jitter buffer length: </span></i><span style='font-size:12.0pt;font-family:"Times New Roman","serif"'><o:p></o:p></span></p></td><td style='padding:1.5pt 1.5pt 1.5pt 1.5pt'><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman","serif"'> (X) Low ( ) Medium ( ) High <o:p></o:p></span></p></td></tr></table><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman","serif"'><br><br>You will need to ensure you are using redundancy mode instead of FEC.<br><br>I am able to send a fax via my voice provider seemingly without errors even though ECM is not enabled, this is because redundancy mode is working as expected on the outbound communication.<br><br>Unfortunately my voice provider only sends one data item in the incoming UDPTL hence the occasional missed line.<br><br>Here is an extract from my sip.conf<br><br>[general]<br>.<br>.<br>t38pt_udptl=yes,redundancy,maxdatagram=400<br>.<br>.<br>[906]<br>; Grandstream HT502 FXS Port<br>; Analogue FAX Modem attached<br>type=friend<br>defaultuser=906<br>md5secret=c5bca943c9b0cc303c496fbf9d48a48e<br>call-limit=1<br>disallow=g722<br>transport=udp<br>qualify=yes<br>directmedia=no<br>host=dynamic<br>context=FAX-T38<br>faxdetect=no<br>deny=0.0.0.0/0.0.0.0<br>permit=10.0.0.0/255.0.0.0<br>permit=172.16.0.0/255.240.0.0<br>permit=192.168.0.0/255.255.0.0<br><br>Larry.<o:p></o:p></span></p></div></body></html>