Does anyone know the answer to this? Should I switch to the sip list?
On Fri, Jan 19, 2001 at 11:16:13AM -0600, David Frascone wrote:
> From section 10.2.1:
>
> Subsequent retransmissions are spaced by T2 seconds. If the client
> receives a provisional response, it continues to retransmit the
> request, but with an interval of T2 seconds. Retransmissions cease
> when the client has sent a total of eleven packets, or receives a
> definitive response. Default values for T1 and T2 are 500 ms and 4 s,
> respectively. Clients MAY use larger values, but SHOULDNOT use
> smaller ones. Servers retransmit the response upon receipt of a
>
> Which means, the INVITE would be retransmitted every 4 seconds while the
> caller is waiting in the queue. And, would stop after 11 retransmissions,
> or 44 seconds, which is still too small for some queues.
>
>
>
> On Fri, Jan 19, 2001 at 05:04:43PM -0000, Jo Hornsby wrote:
> > [Moved to Sip-implementors]
> >
> > > When 182's are sent to indicate queueing, there is no mention of
> > > what happens to T2. I would *assume* that it needs to be reset,
> > > but it is not mentioned in 2543bis-02.
> > >
> > > 4 seconds (the sugested default for T2) is *way* to short for a
> > > queued call.
> >
> > I presume that you are talking about INVITEs (I can't see a 182
> > for much else, realistically), in which case T2 is irrelevant:
> > the moment a provisional response is received, request retransmission
> > is halted (section 10.3.1).
> >
> > T2 only comes into play for non-INVITE (excluding ACK) requests.
> >
> > HTH,
> >
> >
> > - Jo.
> >
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