Consider the case where there are two fones, both registered as the same subscriber (foo@bar.com)
I have max_contacts == 2, therefore the fones actually register
I now add a *third* fone, also registered as foo@bar.com
Since max_contacts == 2, this fone does *not* register.
However, if a user makes a call from this fone, the call will go through.  I wish to prevent this.

What do I do?  Something obvious that I am missing?
Or something weird with twiddling with the RURI and using "registered(domain)"?
Or heavy AVP mucking around?

Cheers
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