I have enabled auto qos for the switchports (cat 3750) connecting to the user's cisco ip phones.. However, I am not sure if the switchports where any of the other devices need to have qos enabled - i.e. cisco routers (voice gateways), call manager servers, etc. I think it would make sense that switchports where voice gateways are connected would need to have qos enabled. But I can be wrong. Can anyone assist? Thanks.