[Freeswitch-users] Email notification when user unregistered?

[Steven Ayre]

Reading the source, FS will only periodically scan the database for expired
registrations and fire the sofia::expire event then. The period between
polling the database will cause a delay between the registration expiring
and the event being raised.

The default is to check every 30s, but can be adjusted with the sofia
profile param registration-thread-frequency. Remember lower values may
raise the event sooner, but will increase load because you're checking the
DB more often. Since the expiry is already going to be a certain amount
after the device disappears a few seconds probably won't make much
difference - 10s vs 30s may sometimes save up to 20s but if the expiry
period was 30 minutes that's not going to be enough to care about since it
may already have been offline for almost half an hour at that point.

The registration expiry time comes from the client, but you can override it
from FS:
http://wiki.freeswitch.org/wiki/Sofia_Configuration_Files#sip-force-expires

-Steve


On 12 December 2012 19:47, Steven Ayre <steveayre at gmail.com> wrote:

> You'll need to manage your expectations here.
>
> SIP registrations start when the client sends a REGISTER, with an expiry
> time. They then periodically send additional REGISTERs to remain
> registered. They can be spread quite a long way apart - several minutes.
>
> A client explicitly unregisters by sending a REGISTER with a 0 expiry
> time, ie the registration expires immediately.
>
> If the client has gone offline because of reboot, network problem etc it
> won't send that final REGISTER. You won't see the client unregister until
> the end of the expiry time when the client hasn't renewed its registration.
>
> Since that's several minutes later, there's no way to see that they have
> unregistered *immediately*. You may be able to reduce the expiry time to
> detect they're offline quicker, but that will increase bandwidth and load.
>
>
>
> As for actually how to detect the unregistration... I suspect the 2 events
> you want to listen for are sofia::unregister and sofia::expire. The names
> suggest the 1st will be for an explicit unregister and the 2nd for when the
> client fails to reregister within the expiry time. That means the 2nd'll be
> the one you'd see if the client goes unexpectedly offline.
>
>
> -Steve
>
>
>
>
> On 12 December 2012 17:52, 王理 <itispip-qq at hotmail.com> wrote:
>
>>  Hi Freeswtich Master,
>>
>> I'm in a situation where I need to proactively moniter whether some
>> device/extension is on in my local network; If for some reason the devices
>> are offline, I need to be noticed immediately so that I can restart the
>> device;
>>
>> Previously I  use xlite client to suscribe to the presence notification
>> of the devices, but recently added some devices which not supporting
>> presence notification, so I want FreeSwitch to send an email notification
>> when some user/extention are getting unregistered;
>>
>> How can I capture a Feeswtich user unregister event & launch a LUA script
>> then?
>>
>> Happy days!
>>
>> /Brgds, Alex
>>
>> _________________________________________________________________________
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>> http://www.freeswitchsolutions.com
>>
>> 
>> 
>>
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