Re: Dual registration without Outbound

Juha Heinanen wrote:
> Paul Kyzivat writes:
> 
>  > Then, what causes the UA to register two different contacts? Are the 
>  > wlan contact and the 3g contact registered to *different* AORs? If not I 
>  > don't see the point. If anything, I would expect that 3g and wlan 
>  > represent access networks and hence differing proxies, not AORs or 
>  > registrars.
> 
> my sip uri is sip:[email protected] and the nokia phone on my desk is
> currently registered to proxy of tutpro.com domain via both its wlan
> interface and its 3g interface.  there is no need to have two different
> proxies.

That's a sensible arrangement. I suppose the wlan and 3g interfaces have 
different IP addresses, and so you have a separate contact for each? So 
you register two contacts to the same AOR via the same proxy, right?

> by the way, when my phone is on wlan and gprs network, the methods
> supported by wlan contact and gprs contact are not the same (if that
> matters anything to the instance-id business).

In that case the choice of one instance id or two is a value judgment on 
your part. I would expect the default choice would be that they would 
have the same instance id. You might prefer distinct instance IDs if you 
want them considered independent devices. For instance, if one is 
IM-only and the other is voice-only then you might want them treated 
independently. But if they have overlapping capabilities, then you may 
have to then suffer having them both "ring" for the same call, which 
could be annoying. (But you might be able to program them to hide that.)

	Thanks,
	Paul
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