[asterisk-dev] SIP register expiry timer

[Olle E. Johansson]

4 maj 2010 kl. 10.31 skrev Nick Lewis:

> 
>> So it looks like they are overriding my default timer. Is there a way
> to
>> override their response so I only regester every 1800 sec?
> 
>> Thanks,
>> Josh
> 
> It looks as if there are a number of problems.
> 
> The parameter for setting the default expiry has an error in your
> sip.conf. It should be defaultexpiry=1800 (defaultexpirey=1800 would
> also be acceptable). I think this will change the requested expires
> header from 120 to 1800.
> 
> However as you point out broadvoice are using 30 seconds for the expires
> header. Unfortunately the correct expiry negotiation consists of the UAC
> requesting a value and the UAS deciding the value so I do not think
> there is a way to change this.
Broadvoice has been using 30 secs for many years for NAT traversal.
If they want something else, they will have to change their SBCs.
> 
> One thing that confuses me is that Asterisk seems to be retransmitting
> even when it is receiving a 200 OK response. I would expect it to send
> an acknowledge instead. Perhaps Asterisk is not able to match the 200 OK
> response to the REGISTER request for some reason so is sending again and
> again.
ACK on a REGISTER? Nick... tsss, tss...

But there seems to be a mismatch somewhere.
/O
> 
> -- N_L
> 
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* Olle E Johansson - oej at edvina.net
* Cell phone +46 70 593 68 51, Office +46 8 96 40 20, Sweden