[asterisk-dev] SIP register expiry timer

[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.

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.

-- N_L

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