Abstract: There is provided a method for routing a call through a telecommunications network. The method comprises the steps of receiving a prompt, from one of a plurality of service switching points in a predetermined geographic service area, for a service associated with the call, and determining one of a plurality of tandem switches to which the call will be directed based on a probability distribution. There is also provided a system for routing a call through a telecommunications network.

Abstract: Directory assistance calls are routed to an operator tandem switch that distributes incoming directory assistance calls among available operator positions. For each call, the operator interacts with the caller to identify a directory listing sought by the caller and enters the listing information into the operator's terminal to retrieve the requisite information from a data base. An interface is provided between the directory assistance system and an intercept system to handle listings for which a directory number is no longer operative. A flag set in the data base file for the old directory listing would indicate that the number was on intercept. The system can thus provide current information contained in the directory assistance data base or updated information as to the status of subscriber's of non-working directory numbers, obtained from the intercept system data base.

Abstract: A user of a wireless communication service, e.g. a cellular telephone subscriber, can dial directory assistance; and upon request, the operator service system (OSS) will complete a call connection to a station identified in a retrieved directory listing. The switching office of the wireless communication system will forward data to the operator service system and will provide a connection of the call to the operator service system, both via a dedicated trunk. This trunk utilizes Feature Group D signaling. The OSS identifies the particular carrier providing the wireless communication service based on the identification of the dedicated trunk. The operator service system records the request for call completion, any details of the connection to the identified station necessary for billing and the identity of the requesting terminal.