On Tue, 2009-03-17 at 23:29 +0100, javier.ferreirogar...@telefonica.es
wrote:
> 
> Thanks, Dale 
> 
> I meant subscriptions. The current sequence is 
> 
> User logs-in in operational mode A: 
> ->Initial REGISTER feature-tag A 
> ->subscription to N different event packages (common no matter which
> operational mode selected) 
> User changes operational mode on the fly 
> ->automatic unsubscription to N event-packages 
> ->automatic deregistration feature-tag A 
> ->automatic initial registration feature-tag B (new Call-Id, CSeq is
> set to 1) 
> ->automatic subscription to N event-packages 
> 
> The sequence we are wondering to explore is 
> 
> User logs-in in operational mode A: 
> ->Initial REGISTER feature-tag A 
> ->subscription to N different event packages (common no matter which
> operational mode selected) 
> User changes operational mode on the fly 
> ->automatic refresh REGISTER feature-tag B 
> 
> i.e. reuse "old" subscriptions (i should have better said keep) 

As you have written the question, of course you can reuse the "old"
subscriptions, because the information returned to a subscription is
independent of the registration status of the element that has made the
subscription.  Certainly, un-registering will not terminate the
registration (unless you have a security mechanism that couples the two,
which is not a good idea).

Dale


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