Support International Callback

This feature will allow RS users to have the RS system to call them and then another destination in order to save them making expensive calls from their cell phones wherever they may be roaming. The basic method to invoke this will be to send an SMS message to the RS server with the account ID, password, opcode (make call), and destination number. Alternate methods will be explored in the future.

Reorganize rate table infrastructure

Need to support multiple rate tables for subscribers (country of origin, special corporate rates) for easy perusing by subscribers and for RS bill processing.

Restrict very expensive outbound routes

We want to prevent users from calling expensive routes or have users to explicitly request authorization to use these routes.
(c) 2008 RSN