[Serusers] HELP: re-INVITE Sometimes Not Processed Properly

[Java Rockx]

Klaus,

What would prevent ser from sending the INVITE for which a 200OK as
already been received? Is this something in ser.cfg or is it something
internal to the ser core?

Regards,
Paul


On Tue, 15 Mar 2005 16:44:55 +0100, Klaus Darilion
<klaus.mailinglists at pernau.at> wrote:
> Hi Paul!
> 
> Java Rockx wrote:
> > INVITE sent to PSTN gateway
> > PSTN GW sends 180 Ringing
> > PSTN GW sends 200 OK, which is sent to the SIP UA
> > SIP UA replied with ACK, which is sent to the PSTN GW
> > Time Elapses
> > PSTN GW sends re-INVITE, which is sent to the SIP UA
> > SIP UA replies with 200 OK, which is sent to the PSTN GW
> > PSTN GW sends another re-INVITE
> 
> This is a retransmission - apparently the response needed more then
> 0.5s. But the Gateway shouldn't send retransmissions, as it already
> received a 100 Trying. (Does the 100 trying really hit the gateway?)
> 
> > PSTN GW sends an ACK, which is sent to the SIP UA
> > re-INVITE (received immediated before the ACK) is sent to the SIP UA
> 
> The SIP proxy shouldn't forward the INVITE as he already received the
> 200 Ok. Strange things are happening.
> 
> regards,
> klaus
> 
> >
>