It should be ok with most VOIP phones.
Some basic info:
- Cisco AutoQoS VoIP currently identifies H.323, H.225 (Unicast only), SIP, Skinny and MGCP signaling protocols. The user can configure access-lists to identify additional signaling protocols.
- Make sure CEF is turned on
- Make sure CDP is turned on for any interface that has autoqos enabled
- In case of low speed FR/ATM and Serial links, Cisco AutoQoS must be enabled on both ends of the connection to function correctly.
- Configure "bandwidth" under any participating interfaces or sub-interfaces. For ATM PVC, configure "vbr-nrt" under the PVC.
Have you activated SNMP traps to a host someplace? AutoQoS will send SNMP traps if problems start happening, and would be a good key indicator for you if you need to adjust the policy it is deploying automatically.
Hope that helps.