<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0//EN" "http://www.w3.org/TR/REC-html40/strict.dtd"><html><head><meta name="qrichtext" content="1" /><style type="text/css">p, li { white-space: pre-wrap; }</style></head><body style=" font-family:'Lucida Console'; font-size:9pt; font-weight:400; font-style:normal;">On Montag, 17. August 2009, BERGANZ François wrote:<br>
> In a SIP Frame, how to see if it is a T38 frame?<br>
><br>
> Thank you<br>
<p style="-qt-paragraph-type:empty; margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px; -qt-user-state:0;"><br></p>Hi BERGANZ François,<br>
<p style="-qt-paragraph-type:empty; margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px; -qt-user-state:0;"><br></p>T.38 is not transfered in SIP packets. The sip only contains the SDP offer for T.38. The actual data is transfered in UDPTL packets, which contains in a binary format (ASN.1 i think) the fax data. Use wireshark to take a look into the packets, its a bit hard to decipher this manually. :)<br>
<p style="-qt-paragraph-type:empty; margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px; -qt-user-state:0;"><br></p>Cheers,<br>
<p style="-qt-paragraph-type:empty; margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px; -qt-user-state:0;"><br></p>Henning</p></body></html>