[SR-Users] Double Invite / Issue

[Brandon Armstead]

Hello,

    I am running into a problem where I am experiencing duplicated INVITE's
being originated from Kamailio proxy.

U 2011/12/13 23:58:17.543802 KAMAILIO:5060 -> PSTN:5060
INVITE sip:URI at PSTN SIP/2.0.

U 2011/12/13 23:58:17.543840 KAMAILIO:5060 -> PSTN:5060
INVITE sip:URI at PSTN SIP/2.0.

As you can see that the timestamp between the two invites is literally a
fraction of seconds.

There is no failure condition that is causing this with append_branch

There is no retransmission timer issue that is causing this (using default
timing):

modparam("tm", "retr_timer1", 500)
modparam("tm", "retr_timer2", 4000)

Any thoughts / ideas - as this is causing a race condition in which there
is a 200 OK that is being sent back from upstream -- and we are then
CANCELING the 2nd INVITE which is essentially causing on overall problem
with the call.

Thanks for all help / thoughts / input in advance, thanks!

Sincerely,
Brandon Armstead
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