[Serusers] ACK Question

Klaus Darilion klaus.mailinglists at pernau.at
Wed Aug 17 11:49:00 CEST 2005

Hi Darren!

Obviously the SIP Client wants the ACK within a certain amount of time. 
If it does not receive the ACK within this time, it hangs up.

Thus, I suggest configuring the SIP Client to wait a little bit longer. 
Which SIP client is it? A softphone or a gateway?

Usually gateways (eg Cisco) can be configured to increase 
retransmissions and have a higher timeout.


Darren Nay wrote:
> Hey all ..
> Is it a possibility for SER to generate an ACK?
> Ie.  I have a PSTN gateway that sends a 200 OK, but in one particular case
> (a VoIP IAD on a satellite connection) it is taking too long for the 200 OK
> to get to the IAD and then ACK to come back.  So the call is connecting, but
> then the PSTN times out and disconnects the call after about 3 seconds when
> it doesn't receive the ACK.
> I want to be able to generate the ACK from SER in this case.  Instead of
> letting the call get setup, and then drop.
> I know it sounds clunky, but I think it will work fix a problem that we're
> having.
> TIA!
> Darren Nay
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