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<DIV><FONT face=Arial size=2>am attempting to negotiate the issues of NAT
traversal with Windows messenger (4.7) as the SIP user agent </FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>seems support for symmetric signaling is
prerequisite to this - </FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>documentation seems to suggest that Windows
messenger (version not documented) supports symmetric signaling. </FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>would therefore be expecting SIP data to be
initiated from port 5060 - this is not the observed behaviour as i see data
initiated from UDP port 1895 with the "contact" header being populated
with the port number 16895 </FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>does the symmetric signaling need to be explicity
enabled (and if so how) for versions of windows messenger ??</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>GT</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV></BODY></HTML>