Abstract: In a telecommunications network, a platform is provided to perform authorization, routing, gathering, and delivery of transmissions between multiple remote units and host locations. In a controlled environment, remote units are authorized to initiate transmissions to and receive transmissions from a limited number of locations. The platform stores profile information for remote units in a database, including services authorized for remote units based on timing events. The platform determines the appropriate destination for a transmission from a remote unit based on the profile information stored in the database and identifiers associated with the remote unit and telecommunications router serving the remote unit. The platform authorizes a transmission to the destination based on the profile information, determines a routing number associated with the destination, and transmits the routing number to an appropriate point in the network to enable completion of the transmission.