Each SAP of an ATM VLL has an associated single egress service queue on the IOM. The default QoS policy configures this queue to have CIR=0 and PIR=line rate. Other QoS policies can be applied if they specify a single service queue. Applying a non-default QoS policy allows the CIR/PIR of the outgoing traffic to be controlled, regardless of whether ATM shaping is configured.