<br><div class="gmail_quote"><div>Here is my setup;<br><br>Fax machine -> PSTN -> Cisco Voice GW -> IP cloud -> Asterisk. As on Cisco Voice GW, T.38 fax already configured on SIP protocol. <br> </div><blockquote class="gmail_quote" style="margin:0pt 0pt 0pt 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
Does your VoIP provider support t.38?<br>
<br>
Sent from my iPad<br>
<br>
On Jun 22, 2012, at 11:05 AM, Ahmed Munir <<a href="mailto:ahmedmunir007@gmail.com">ahmedmunir007@gmail.com</a>> wrote:<br>
<br>
> Hi,<br>
><br>
> I recently configured T.38 on Asterisk 10.4.2. When I send the fax to Asterisk, it gives the errors as listed below;<br>
><br>
> WARNING[25986]: app_fax.c:442 transmit_audio: channel 'SIP/192.168.1.69-00000000' refused to negotiate T.38<br>
> WARNING[25986]: app_fax.c:174 span_message: WARNING T.30 ECM carrier not found<br>
><br>
> As in sip.conf the configuration is listed below;<br>
><br>
> t38pt_udptl = yes,fec,maxdatagram=400<br>
> faxdetect = t38<br>
><br>
> And the rest are the standard configuration.<br>
><br>
> Please advise to resolve this issue.<br>
><br>
> --<br>
> Regards,<br>
><br>
> Ahmed Munir Chohan<br>
><br clear="all"></blockquote></div><br>-- <br>Regards,<br><br>Ahmed Munir Chohan<br><br><br>