By default, VoIP queueing is off, and Weighted Fair VoIP Queueing (WFVQ) is enabled on all FastEthernet interfaces for which traffic-shaping is enabled. If you disable custom queueing by using no voip-queue, WFVQ is re-enabled.
Syntax
[no] voip-queue
User level
read-write
Context
interface:FastEthernet (L2, L2-L3) - when traffic shaping is configured, Dialer (L2, L2-L3)