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<p class=MsoNormal>Anca,<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>I’ve nearly got my B2BUA ready for deployment,
however, in a front-end/back-end solution, with my standard proxy configuration
in the front-end (passing calls to the B2BUA back-end), I’m having
trouble putting a call on hold. Please note that all other functionality
is working great – REFERs, media-related reINVITEs, etc.<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>I noticed this because if I put the call on hold for too
long while attempting a REFER, I start having problems.<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>Basically, the TM module on the B2BUA keeps re-transmitting
the final 200 OK. The UAC responds to all of these with an ACK, which the
B2B passes on to the far SIP endpoint. Eventually the UAC, getting
hammered by OKs, assumes there’s a problem and sends a BYE after about 30
seconds. Note that if I transfer during this time period, the call stays
up indefinitely. It’s only the reINVITE for “hold” that
breaks it.<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>My config on the B2B box is super-simplified (less than 10
lines) so I don’t think it’s a configuration problem. Happy
to post B2B confgs/debug/SIP trace/etc. Please let me know what (if
anything) is necessary.<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>Please advise. Thanks,<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>Jeff K<o:p></o:p></p>
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