[Serusers] Blocking calls from unregistered users

[Andreas Granig]

Dave wrote:
> You can't as far as I know. You must use a USer Agent
> that does not allow a user to make a calls unless the
> UA is registered. 

You could save the R-Uri and From-Uri into avps, push the saved From-Uri 
into R-Uri and call registered(), then push the saved R-Uri to R-Uri to 
restore it.

Haven't tried that though.

Andy