<div dir="ltr"><div>Hello Brian,</div><div>thanks for your reply.</div><div>Can you point me out to the bug so i can check in which versions it has been fixed?</div><div>Thanks a lot.</div><div>S<br></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">Il giorno gio 30 mag 2019 alle ore 01:58 Brian West <<a href="mailto:brian@freeswitch.com">brian@freeswitch.com</a>> ha scritto:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr">Update, this has been fixed for quite a while.</div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Wed, May 29, 2019 at 6:52 PM Giovanni Maruzzelli <<a href="mailto:gmaruzz@gmail.com" target="_blank">gmaruzz@gmail.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr"><div dir="ltr">On Thu, May 30, 2019 at 12:46 AM Sandro Bordacchini <<a href="mailto:sandro.bordacchini@nems.it" target="_blank">sandro.bordacchini@nems.it</a>> wrote:<br></div><div class="gmail_quote"><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr">I am just wondering if it's possible to configure FS to accept the G711 media and "turn off" the T38 media that have been received in the same sdp (refer to reinvite in the unsuccessful case).<div>That would be really helpful for me but i wasnt able to get that kind of behaviour.</div><div>Am I missing something?</div></div></blockquote><div><br></div><div>Maybe I do not understand what you want to achieve. If you do not act on T38, then also if you are offered it, you will not take it in consideration, and just process the call as a call without T38</div><div><br></div><div>If you are "proxying" T38 (eg inbound T38 outbound plain g711), then there are specific settings for it</div><div><br></div><div>Check both of the links:<br></div><div><br></div><div><a href="https://freeswitch.org/confluence/display/FREESWITCH/T.38#T.38-Sofiaprofileparameters" target="_blank">https://freeswitch.org/confluence/display/FREESWITCH/T.38#T.38-Sofiaprofileparameters</a></div><div><br></div><div><a href="https://freeswitch.org/confluence/display/FREESWITCH/mod_spandsp" target="_blank">https://freeswitch.org/confluence/display/FREESWITCH/mod_spandsp</a></div><div> </div><div>-giovanni</div><div><br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr"><div><br></div><div>Thanks a lot.</div><div>S<br></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">Il giorno mer 29 mag 2019 alle ore 10:20 Giovanni Maruzzelli <<a href="mailto:gmaruzz@gmail.com" target="_blank">gmaruzz@gmail.com</a>> ha scritto:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr"><div>Hello Sandro,</div><div><br></div><div>so, they want you to send out faxes with T30 in g711? That will be *very* unreliable, you *want* to use T38.</div><div><br></div><div>Anyway, you want to use PCMA with normal packet size (eg, not 10 ms). You just specify PCMA as absolute_codec string.</div><div><br></div><div>You do not have to refuse explicitly the call (no 488), you just do not accept t38 fax transmission.</div><div><br></div><div>So, disable t38 everywhere, and do the fax over g711 (eg, over pcma).</div><div><br></div><div>That will be very unreliable. T38 has been created to solve that unreliability.</div><div><br></div><div>If you happen to find a FreeSWITCH book, there is a chapter about faxes.</div><div><br></div><div><br></div><div>Hope this help,</div><div>-giovanni</div><div><br></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Wed, May 29, 2019 at 6:51 AM Sandro Bordacchini <<a href="mailto:sandro.bordacchini@nems.it" target="_blank">sandro.bordacchini@nems.it</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr"><div><div>Hello everyone.</div><div><br></div><div>I am have a few FS installations interconnected with a voip provider; during outbound fax server transmissions, they told us that we need <b>to refuse T38 even if offered by the network</b>.</div><div></div><div>The sdp offer/answer negotiation varies depending on the called number, probably due to a different routing in the voip provider's network.</div><div>I experience some dropped calls (even before the fax transmission kicks in) using both FS versions 1.4.9 and 1.6.16.
</div><div><br></div><div>This is a successful sdp negotiation (after call is estabilished)<br></div>First reinvite:<br><div>REMOTE INVITE with SDP: v=0..o=LucentPCSF 413445855 413445856 IN IP4 10.198.1.230..s=-..c=IN IP4 10.198.1.230..t=0 0..m=audio 15756 RTP/AVP 8 96 4..a=rtpmap:96 telephone-event/8000..a=fmtp:96 0-15..a=ptime:20..a=X-sqn: 0..a=X-cap: 1 image udptl t38..</div><div>LOCAL 200OK with SDP: v=0..o=FreeSWITCH 1558069426 1558069428 IN IP4 10.197.98.6..s=FreeSWITCH..c=IN IP4 10.197.98.6..t=0 0..m=audio 30394 RTP/AVP 8 96..a=rtpmap:8 PCMA/8000..a=rtpmap:96 telephone-event/8000..a=fmtp:96 0-16..a=silenceSupp:off - - - -..a=ptime:20..</div><div></div><div>Then, a second reinvite happens:<br></div>REMOTE INVITE with SDP: v=0..o=LucentPCSF 413445855 413445857 IN IP4 10.198.1.230..s=-..c=IN IP4 10.198.1.230..t=0 0..m=audio 0 RTP/AVP 0..c=IN IP4 10.198.1.230..m=image 12834 udptl t38..a=X-sqn: 0..a=X-cap: 1 image udptl t38..<br><div>LOCAL 488 <br></div><div></div>Then, the last reinvite:<br>REMOTE INVITE with SDP: v=0..o=LucentPCSF 413445855 413445858 IN IP4 10.198.1.230..s=-..c=IN IP4 10.198.1.230..t=0 0..m=audio 15756 RTP/AVP 8 96 4..a=rtpmap:96 telephone-event/8000..a=fmtp:96 0-15..a=ptime:20..a=X-sqn: 0..a=X-cap: 1 image udptl t38..m=image 0 udptl t38..c=IN IP4 10.198.1.230..<br>LOCAL 200OK with SDP: v=0..o=FreeSWITCH 1558069426 1558069429 IN IP4 10.197.98.6..s=FreeSWITCH..c=IN IP4 10.197.98.6..t=0 0..m=audio 30394 RTP/AVP 8 96..a=rtpmap:8 PCMA/8000..a=rtpmap:96 telephone-event/8000..a=fmtp:96 0-16..a=silenceSupp:off - - - -..a=ptime:20..m=image 0 udptl t38..<br></div><div>And the fax is transmitted correctly</div><div><br></div><div>This is an unsuccessful sdp negotiation:</div><div>First reinvite<br></div>REMOTE INVITE with SDP: v=0..o=LucentPCSF 579041281 579041282 IN IP4 10.198.1.230..s=-..c=IN IP4 10.198.1.230..t=0 0..m=audio 13302 RTP/AVP 8 96..a=rtpmap:96 telephone-event/8000..a=ptime:10..a=ecan:fb on -..a=Fax..m=image 17522 udptl t38..a=T38FaxVersion:0..a=T38MaxBitRate:14400..a=T38FaxRateManagement:transferredTCF..a=T38FaxMaxBuffer:1800..a=T38FaxMaxDatagram:260..a=T38FaxUdpEC:t38UDPRedundancy..a=ecan:fb on -..<br>LOCAL 488<br><div>and the remote hangs up.</div><div><br></div><div>
My point is that, in case of unsuccessful negotiation, FS receives a reinvite with two "m=" in the sdp, one G711A (port 13302) and one T38 (port 17522).</div><div>Is it ok for FS to refuse "all the sdp" with 488 just because it has to refuse T38 or it should be configured to refuse only the T38 media?</div><div>Should remote endpoint send another reinvite with only G711 or only T38 before hanging up?<br></div><div><br></div><div>Thanks in advance to whoever read till here :-)</div><div>Any hints?</div><div><br></div><div>S.<br></div><div></div><div><br></div><div>P.s.:<br></div><div><div>This is what i get in the log in the unsuccessful case during the reinvite (1.4.9 code):</div><div>[...]<br></div><div>
2019-05-17 11:22:57.498389 [DEBUG] switch_core_media.c:3476 Audio Codec Compare [PCMA:8:8000:10:64000:1]/[PCMA:8:8000:10:64000:1]<br>2019-05-17 11:22:57.498389 [DEBUG] switch_core_media.c:3531 Audio Codec Compare [PCMA:8:8000:10:64000:1] ++++ is saved as a match<br>2019-05-17 11:22:57.498389 [DEBUG] switch_core_media.c:3397 Set telephone-event payload to 96<br>2019-05-17 11:22:57.498389 [DEBUG] switch_core_media.c:3713 Set 2833 dtmf send payload to 96<br>2019-05-17 11:22:57.498389 [ERR] sofia.c:7065 Reinvite Codec Error!<br>2019-05-17 11:22:57.498389 [DEBUG] switch_core_session.c:1053 Send signal sofia/external/<calledfaxnumber> [BREAK]<br>2019-05-17 11:22:57.498389 [DEBUG] switch_core_session.c:1053 Send signal sofia/external/<calledfaxnumber>
[BREAK]<br>2019-05-17 11:22:57.498389 [DEBUG] switch_core_media.c:2280 Already using PCMA<br>2019-05-17 11:22:57.498389 [DEBUG] sofia.c:6444 Channel sofia/external/<calledfaxnumber>
entering state [ready][488]<br>2019-05-17 11:22:57.638443 [DEBUG] switch_core_session.c:1053 Send signal sofia/external/<calledfaxnumber>
[BREAK]<br>2019-05-17 11:22:57.638443 [NOTICE] sofia.c:952 Hangup sofia/external/<calledfaxnumber>
[CS_EXECUTE] [NORMAL_CLEARING]<br>2019-05-17 11:22:57.638443 [DEBUG] switch_channel.c:3222 Send signal sofia/external/<calledfaxnumber>
[KILL]<br>2019-05-17 11:22:57.638443 [DEBUG] switch_core_session.c:1388 Send signal sofia/external/<calledfaxnumber>
[BREAK]<br>2019-05-17 11:22:57.638443 [DEBUG] mod_spandsp_fax.c:293 FLOW T.30 Status changing to 'The call dropped prematurely'<br></div><div><br></div><div>This are the most relevant settings on api originate:</div><div>[<span style="color:rgb(0,0,0);font-family:Geneva,Helvetica,Arial,sans-serif;font-size:12px;font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;font-weight:400;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;text-decoration-style:initial;text-decoration-color:initial;display:inline;float:none">DEBUG] switch_event.c:1688 Parsing variable [fax_use_ecm]=[off]</span><br style="color:rgb(0,0,0);font-family:Geneva,Helvetica,Arial,sans-serif;font-size:12px;font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;font-weight:400;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;text-decoration-style:initial;text-decoration-color:initial"><span style="color:rgb(0,0,0);font-family:Geneva,Helvetica,Arial,sans-serif;font-size:12px;font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;font-weight:400;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;text-decoration-style:initial;text-decoration-color:initial;display:inline;float:none">[DEBUG] switch_event.c:1688 Parsing variable [absolute_codec_string]=[PCMA@10i]<br>[DEBUG] switch_event.c:1688 Parsing variable [fax_enable_t38]=[false]<br>[DEBUG] switch_event.c:1688 Parsing variable [fax_enable_t38_request]=[false]<br>[DEBUG] switch_event.c:1688 Parsing variable [refuse_t38]=[true]<br></span>and on the external profile t38-passthru is set to false.</div><div><br></div><div><br></div><div><br></div><div><br>-- <br><div class="gmail-m_1920323404486204118gmail-m_5168335861520416998gmail-m_9064322807787452702gmail-m_4831189908529432122gmail-m_-1624498182130010320gmail_signature"><div><div><div><p style="font-family:Helvetica,Arial,sans-serif;font-size:12px;line-height:14px"></p>
<p style="font-family:Helvetica,Arial,sans-serif;font-size:12px;line-height:14px;color:rgb(153,153,153)"><span style="font-weight:bold">Ing. Sandro Bordacchini</span>
<span>/</span> System Engineering and Product Management<br><span></span><a href="mailto:sandro.bordacchini@nems.it" style="color:rgb(255,0,0)" target="_blank">sandro.bordacchini@nems.it</a></p><br></div></div></div></div></div></div></div>
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<a href="https://freeswitch.com" rel="noreferrer" target="_blank">https://freeswitch.com</a></blockquote></div><br clear="all"><div><br></div>-- <br><div dir="ltr" class="gmail-m_1920323404486204118gmail_signature"><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div style="font-size:12.8px"><font color="#000000"><br></font></div><div style="font-size:12.8px"><p dir="ltr" style="font-size:12.8px;line-height:1.38;margin-top:0pt;margin-bottom:0pt;margin-left:4.5pt"><span style="font-size:8pt;font-family:Arial;background-color:transparent;vertical-align:baseline;white-space:pre-wrap"><font color="#000000">Brian West | Co-founder and Developer</font></span></p><p style="font-size:12.8px;line-height:1.38;margin-top:0pt;margin-bottom:0pt;margin-left:4.5pt"><span style="font-size:8pt;font-family:Arial;background-color:transparent;vertical-align:baseline;white-space:pre-wrap"><font color="#000000">Need Commercial support? email <a href="mailto:sales@freeswitch.com" target="_blank">sales@freeswitch.com</a> </font></span></p><p dir="ltr" style="font-size:12.8px;line-height:1.38;margin-top:0pt;margin-bottom:0pt;margin-left:4.5pt"><span style="font-size:8pt;font-family:Arial;background-color:transparent;vertical-align:baseline;white-space:pre-wrap"><font color="#000000">FreeSWITCH Solutions | <a href="https://maps.google.com/?q=17345+Civic+Drive+%232531+Brookfield,+WI+53045&entry=gmail&source=g" style="color:rgb(17,85,204)" target="_blank">17345 Civic Drive #2531 Brookfield, WI 53045</a></font></span></p><p dir="ltr" style="font-size:12.8px;line-height:1.38;margin-top:0pt;margin-bottom:0pt;margin-left:4.5pt"><font color="#000000"><span style="font-size:8pt;font-family:Arial;background-color:transparent;vertical-align:baseline;white-space:pre-wrap">Email: </span><span style="color:rgb(17,85,204);font-size:8pt;font-family:Arial;background-color:transparent;vertical-align:baseline;white-space:pre-wrap"><a href="mailto:brian@freeswitch.com" target="_blank">brian@freeswitch.com</a></span></font></p><p dir="ltr" style="font-size:12.8px;line-height:1.38;margin-top:0pt;margin-bottom:0pt;margin-left:4.5pt"><span style="font-size:8pt;font-family:Arial;background-color:transparent;vertical-align:baseline;white-space:pre-wrap"><font color="#000000">Mobile: <span title="Call with Google Voice">918-424-9378</span></font></span></p><p dir="ltr" style="font-size:12.8px;line-height:1.38;margin-top:0pt;margin-bottom:0pt;margin-left:4.5pt"><font color="#000000"><span style="font-size:8pt;font-family:Arial;background-color:transparent;vertical-align:baseline;white-space:pre-wrap">Website: </span><a href="https://www.freeswitch.com/" style="color:rgb(17,85,204)" target="_blank"><span style="font-size:8pt;font-family:Arial;background-color:transparent;vertical-align:baseline;white-space:pre-wrap">https://www.FreeSWITCH.com</span></a></font></p><p dir="ltr" style="font-size:12.8px;line-height:1.2;margin-top:0pt;margin-bottom:0pt"><span style="background-color:transparent;font-size:9pt;font-family:Arial;color:rgb(0,0,0);vertical-align:baseline;white-space:pre-wrap"><a href="https://www.facebook.com/freeswitch" target="_blank"><img alt="https://www.facebook.com/signalwireinc?src=email" style="border: medium none;" width="31" height="31"></a> </span><span style="background-color:transparent;font-size:9pt;font-family:Tahoma;color:rgb(0,0,0);vertical-align:baseline;white-space:pre-wrap"><a href="https://twitter.com/freeswitch" target="_blank"><img alt="https://twitter.com/freeswitch" style="border: medium none;" width="31" height="31"></a></span><br></p></div></div></div></div></div></div></div></div></div></div></div></div></div>
_________________________________________________________________________<br>
<br>
The FreeSWITCH project is sponsored by SignalWire <a href="https://signalwire.com" rel="noreferrer" target="_blank">https://signalwire.com</a><br>
Enhance your FreeSWITCH install with disruptive priced SMS and PSTN services.<br>
Build your next product on our scalable cloud platform.<br>
<br>
Join our online community to chat in real time <a href="https://signalwire.community" rel="noreferrer" target="_blank">https://signalwire.community</a><br>
<br>
Professional FreeSWITCH Services<br>
<a href="mailto:sales@freeswitch.com" target="_blank">sales@freeswitch.com</a><br>
<a href="https://freeswitch.com" rel="noreferrer" target="_blank">https://freeswitch.com</a><br>
<br>
Official FreeSWITCH Sites<br>
<a href="https://freeswitch.com/oss" rel="noreferrer" target="_blank">https://freeswitch.com/oss</a><br>
<a href="https://freeswitch.org/confluence" rel="noreferrer" target="_blank">https://freeswitch.org/confluence</a><br>
<a href="https://cluecon.com" rel="noreferrer" target="_blank">https://cluecon.com</a><br>
<br>
FreeSWITCH-users mailing list<br>
<a href="mailto:FreeSWITCH-users@lists.freeswitch.org" target="_blank">FreeSWITCH-users@lists.freeswitch.org</a><br>
<a href="http://lists.freeswitch.org/mailman/listinfo/freeswitch-users" rel="noreferrer" target="_blank">http://lists.freeswitch.org/mailman/listinfo/freeswitch-users</a><br>
UNSUBSCRIBE:<a href="http://lists.freeswitch.org/mailman/options/freeswitch-users" rel="noreferrer" target="_blank">http://lists.freeswitch.org/mailman/options/freeswitch-users</a><br>
<a href="https://freeswitch.com" rel="noreferrer" target="_blank">https://freeswitch.com</a></blockquote></div><br clear="all"><br>-- <br><div dir="ltr" class="gmail_signature"><div dir="ltr"><div><div dir="ltr"><p style="font-family:Helvetica,Arial,sans-serif;font-size:12px;line-height:14px"><a href="http://www.nems.it" target="_blank"><img src="http://www.nems.it/images/logo.jpg" alt="NEMS S.r.l." border="0"></a></p>
<p style="font-family:Helvetica,Arial,sans-serif;font-size:12px;line-height:14px;color:rgb(153,153,153)"><span style="font-weight:bold">Ing. Sandro Bordacchini</span>
<span>/</span> System Engineering and Product Management<br>
<span style="color:rgb(153,153,153)">(+39)
347 96 96 531 </span><span>/</span> <a href="mailto:sandro.bordacchini@nems.it" style="color:rgb(255,0,0)" target="_blank">sandro.bordacchini@nems.it</a></p>
<p style="font-family:Helvetica,Arial,sans-serif;font-size:12px;line-height:14px">
<span style="font-weight:bold;color:rgb(153,153,153)">NEMS S.r.l.</span>
<span style="color:rgb(153,153,153)">Office: </span>
<span style="color:rgb(153,153,153)">(+39)
0587 466957 ext 204</span> <span style="color:rgb(153,153,153)">/ Fax: </span> <span style="color:rgb(153,153,153)">(+39) 0587 829177</span>
<span><br>
</span> <span style="color:rgb(153,153,153)">Via Squartini, 18 - 56121 Pisa (PI) Italy </span><br>
<a href="http://www.nems.it" style="color:rgb(255,0,0)" target="_blank">http://www.nems.it</a>
</p>
<p style="font-size:12px;line-height:14px"><a href="http://vcf.nems.it/facebook.png" target="_blank"><img src="https://htmlsig.com/images/icon-komodo/facebook.png" alt="Facebook"></a> <a href="http://www.linkedin.com/company/5020065" target="_blank"><img src="http://vcf.nems.it/linkedin.png" alt="Linkedin"></a> <a href="http://www.twitter.com/nemssrl" target="_blank"><img src="http://vcf.nems.it/twitter.png" alt="Twitter"></a> <a href="https://plus.google.com/117770114595753846641" target="_blank"><img src="http://vcf.nems.it/google-plus.png" alt="Google Plus"></a>
</p>
<p style="font-family:Helvetica,Arial,sans-serif;color:rgb(153,153,153);font-size:11px;line-height:14px">In ottemperanza con il nuovo Regolamento Europeo GDPR n. 679/2016, le informazioni contenute in questo messaggio sono riservate e confidenziali. Il loro utilizzo è consentito esclusivamente al destinatario del messaggio, per le finalità indicate nel messaggio stesso. Qualora Lei non fosse la persona a cui il presente messaggio è destinato, La invitiamo ad eliminarlo dal Suo Sistema ed a distruggere le varie copie o stampe, dandocene gentilmente comunicazione. Ogni utilizzo improprio è contrario ai principi del nuovo Regolamento Europeo GDPR n. 679/2016.<br>NEMS S.r.l. opera in conformità al nuovo Regolamento Europeo GDPR n. 679/2016. Per qualsiasi informazione a riguardo si prega di contattare l’indirizzo mail: <a href="mailto:info@nems.it" target="_blank">info@nems.it</a><font color="#ff0000"><tt><br></tt></font></p></div></div></div></div>