Prepaid - Postpaid Billing

Hi,

I want to use credit control interceptor for prepaid subscribers and cdr_to_diameter service for postpaid subscribers. How would i do that? as it seems if i turn on any of these services all billing requests independent of the type of subscriber will be pushed towards these services.

Also can i use parlayx payment for postpaid subscribers as i need an interface to do session based charging i.e. one cdr for start-interim-stop. But currently parlayx payment only supports Ro interface.

Plus how would i use service correlation with credit control interceptor and cdr_to_diameter service. Multiple correlated services, charged once.