[Asterisk-Users] "Registered SIP '202' ... expires 1800". Why does it expire

[reticent]

I don't remember where in the spec it says this, but i believe if the 
UAC does not specify an expires value the server can provide one to the 
UAC in the "200 Ok" response


Marek Zachara wrote:

>>Which is kinda annoying because grandstreams (at least 1.0.5.23 firmware
>>anyway) don't do that...  I have to powercycle the one on my desk once
>>an hour if I want it to ring on incoming calls otherwise asterisk
>>'forgets' about it (the cisco in the other room seems to be fine).
>>
>>I'd love an option to work around that...
>>
>>    
>>
>This is very strange, as its usually the phones which tell the server how long 
>their registration is to be valid. At least thats the case with all the sip 
>phones i've seen so far. I assume this is a bug in the phone software, so 
>upgrading the firmware could help.
>
>
>Marek
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