I'm doing some testing with a VoIP phone that is vpn connecting to a ASA that referencs a local ACS username. I've enabled the Voice-over-IP (VoIP) group and put this user into that group. I'm not able to find any docs on the Cisco website (or online) that describe this functionality, or explain what the restrictions are when using this specific ACS group. Can you explain how this works, the security implications and where I might find docs other than the ACS user guides which has one small section describing this? It's ACS version V4.2.
I have this problem too.