Termination Route Sensitive Billing (TRSB)
The Termination Route Sensitive Billing (TRSB) feature is available in RadiusCat Multi Tenant Edition v1.3.x and higher and allows the RadiusCat Billing engine to rate/bill calls based on the Carrier that the call is terminated with versus rating/billing the calls for a caller based on a fixed Rate Table.
The TRSB feature is optional for use on Tenant Group Accounts and simply requires the Administrator to make a selection on the Tenant Group Account to turn this option on. Keeping in line with the flexibility of the RadiusCat Billing engine you have the option of separating phones/extensions in groups and as such can have some phones operate using the TRSB while other operate with Static Billing (SB).
http://svkwiki.com/wiki/Termination-Route-Sensitive-Billing