Re: Dual registration without Outbound

Christer Holmberg wrote:

> But, in scenarios where the outbound- and registrar proxies are NOT
> co-located, and only one registrar is used, I see no reason why people
> shall be forced to register both contacts to both outbound proxies. In
> cases where the contact is access network dependent it may not even be
> possible to do so.

I don't understand the last statement. You can put *any* syntactically 
valid URI in a Contact of a REGISTER.

Perhaps you mean it won't work once registered, when combined with the 
resulting Service-Route. In that case the edge proxy (P-CSCF) may be 
asked to route to a URI that is not on the access network that it is 
intended to use. But I guess that is just one aspect of the closed 
nature of 3gpp.

The problem I see developing here is the idea that the registration 
behavior of the UA is dependent on its understanding the topology of the 
network. Its one thing to expect it to know of a couple of attachment 
points. Its another thing to expect it to know more about what is behind 
those attachment points.

	Thanks,
	Paul
_______________________________________________
Sip mailing list  https://www.ietf.org/mailman/listinfo/sip
This list is for NEW development of the core SIP Protocol
Use [email protected] for questions on current sip
Use [email protected] for new developments on the application of sip