Configuring Policies and Services for VoIP
When you set up a service that supports VoIP, you need to create a policy group for the VoIP service and assign the policy group to the VoIP service.
The SAE installs the policy on the router when the service is activated. When the service session is modified during VoIP call setup, the SAE replaces policy values with new values that were negotiated during call setup. The SAE then creates a new policy and installs it on the router.
When you set up a policy group for VoIP services, you need to assign variable parameters to fields that the SAE will need to modify. For example, source and destination addresses and UDP ports might be replaced with actual values. Upstream and downstream rate-limit parameters, such as committed rate and burst sizes, are likely to be modified.