Pascal Maugeri wrote:
> Hi
>
> We have a UA that registers to our SIP registrar that itself does a
> "third-party registration" to an Application Server (AS).
>
> Once the UA is registered and the AS informed of the registration, we want
> the AS to be able to de-register the UA, on-demand (eg. the AS detected
> something wrong with this UA and wants to de-register it).
>
> What solutions are commonly used for that purpose ?
> Shall the AS communicate directly to the UA ?
> Or the UA subscribe to "Event Package for Registrations" (RFC 3680) and
> somehow the AS requests the registrar to terminate the registration ?
Well, subject to authorization, anybody can do an unregister of any
contact from any registrar. So if it can get authorized, your AS can do
that.
But that may not be a good thing if the UA doesn't know it has been
unregistered. IMS uses the reg event package to allow the UA to know it
has been unregistered.
Paul
> BTW, we use OpenSER as the proxy/registrar in front of our AS. If you have
> any specific recommendations to OpenSER, please feel free to share them with
> me.
>
> Regards,
> Pascal
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