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Organization: SipXecs Forum
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Message-ID: <[email protected]>



Has anyone else noticed anything odd when setting a user's
call forwarding to ring a cell phone, then fall back to
voicemail on the sipXecs platform?

I've noticed the same behavior on both my 4.2.1 and 4.4.0
test systems.  If I set the expiration for the cell to 15
seconds and nobody picks up on the cell (it's not long
enough to go to the cell's VM), then when I'm leaving a
message for the user on the sipXecs platform I get
disconnected after approximately 15 seconds and the
voicemail is not saved.  The BYE is coming from sipxbridge. 
When I try the same sequence only with call forwarding set
to a regular PSTN landline, I can successfully leave a
message for the user.

The only thing I can see that's different when comparing the
SIP messaging between the two scenarios is how early media
is handled.  In the forwarding to cell scenario, I see 183
session progress with SDP in addition to the 180 ringing
with SDP, as opposed to just 180 ringing with SDP for the
landline.  Without having delved into the code as of yet, it
seems to me that there is possibly some sort of timer that
is not getting cancelled in the first case.

SIP traces and pcaps are available to illustrate.
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