Using Default Parameter Values for Normalizers

You can define a default parameter value for a normalizer to handle cases when the network message or MDC field contains a value that is not defined in the normalizer.

When the MDC field used for normalization does not contain a value that matches any of the parameter values defined, the default value is used. For example, say you charge subscribers for data transfers based on the type of mobile device they own, iPhone™ or Blackberry™. If you set iPhone as the default value and a subscriber makes a call with a different device, the rate or policy selected is the one that matches all parameter values for the iPhone (default) parameter value.

When a default value is not defined and offline rating is performed, the event record will be rejected and logged for re-cycling purposes if no values match. When a default value is not defined and online rating is performed, the event will not be authorized, so subscribers cannot access the service. If an authorization request is not received, subscribers will have free usage because the MATRIXX Charging Application does not deny service access.