Hello - here is a snippet from the CAM manual. "You must create a Global Device filter list of MAC Addresses designed to ignore IP phones through which client machines connect to your network. You can define a list of MAC Addresses by compiling a collection of individual MAC addresses (Cisco recommends this method only for small deployments)"
Therefore - what does Cisco recommend for large deployments?
Maintaining a whitelist of Printers/APs is bad enough, now we have to whitelist hundreds of phones? I doubt the wildcard filters would match all of them.
You can always use Great Bay Beacon. This is what Cisco has recommended in the past.