Does your ITSP support T.38? Try to catch RE-INVITEš<div><br></div><div>ngrep -d eth0 -qt -W byline -i t38<br><br><div class="gmail_quote">20 ÍÁÒÔÁ 2012šÇ. 7:11 ÐÏÌØÚÏ×ÁÔÅÌØ Mitch Capper <span dir="ltr">&lt;<a href="mailto:mitch.capper@gmail.com">mitch.capper@gmail.com</a>&gt;</span> ÎÁÐÉÓÁÌ:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Faxing is a B to try and get it to work reliably over VOIP. šI have<br>
added a troubleshooting section at:<br>
<a href="http://wiki.freeswitch.com/wiki/Mod_spandsp#Troubleshooting" target="_blank">http://wiki.freeswitch.com/wiki/Mod_spandsp#Troubleshooting</a> šwith what<br>
I have found. šIt may help to track down the problem.<br>
<br>
~mitch<br>
<br>
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</blockquote></div><br></div>