1. Field of the Invention
The present invention generally relates to systems for routing telephone calls to appropriate numbers. More particularly, the present invention relates to an Advanced Intelligent Network (AIN) based system and methods for routing telephone calls based on the location of the calling party.
2. Acronyms
The written description provided herein contains acronyms which refer to various communication services and system components. Although known, use of several of these acronyms is not strictly standardized in the art. For purposes of the written description herein, acronyms will be defined as follows:
AIN--Advanced Intelligent Network PA0 AMA--Automatic Message Accounting PA0 CCIS--Common Channel Interoffice Signaling PA0 CO--Central Office PA0 CPN--Calling Party Number PA0 CPR--Call Processing Record PA0 DN--Dialed Number Trigger PA0 DRS--Data Reporting System PA0 EO--End Office (EO) PA0 ISCP--Integrated Service Control Point PA0 LSP--Local Service Provider PA0 NPA--Number Plan Area, i.e., area code PA0 NXX--Central Office Code PA0 RTN--Routing Telephone Number PA0 SCE--Service Creation Environment PA0 SCP--Service Control Point PA0 SCCP--Signaling Connection Control Part PA0 SMS--Service Management System PA0 SPC--Signaling Point Code PA0 SS7--Signaling System 7 PA0 SSP--Service Switching Point PA0 STP--Signaling Transfer Point PA0 TAT--Terminating Attempt Trigger PA0 TCAP--Transaction Capabilities Applications Protocol
3. Description of the Related Art
In recent years, a number of new telephone service features have been provided by advanced intelligent communications networks such as an Advanced Intelligent Network (AIN). The AIN evolved out of a need to increase the capabilities of the telephone network architecture to meet the growing needs of telephone service customers. The AIN architecture generally comprises two networks, a data messaging network and a trunked communications network. The trunked communications network handles voice and data communications between dispersed network locations, whereas the data messaging network is provided for controlling operations of the trunked communications network.
An illustration of the basic components of an AIN architecture is shown in FIG. 1. As shown in FIG. 1, Central Offices (CO) 10-16 are provided for sending and receiving data messages from an Integrated Service Control Point (ISCP) 20 via a Signaling Transfer Point (STP) 30-34. The data messages are communicated to and from the COs 10-16 and the ISCP 20 along a Common Channel Inter-Office Signaling (CCIS) network 22. Each CO 10-16 serves as a network Service Switching Point (SSP) to route telephone calls between a calling station (e.g., station 40) and a called station (e.g., station 48) through the trunked communications network 24-26. For more information regarding AIN, see Berman, Roger K., and Brewster, John H., "Perspectives on the AIN Architecture," IEEE Communications Magazine, February 1992, pp. 27-32, the disclosure of which is expressly incorporated herein by reference in its entirety.
While prior AIN or AIN-type intelligent network applications may have provided various features to subscribers and users, these prior applications do not allow users to dial one telephone number and reach a single point of contact for multiple services provided by a subscriber. Current systems and methods require users to identify one of many possible numbers to call depending on the specific information or service desired from the subscriber. This requires users to know the telephone number of all departments or service groups of the subscriber that they need information from.
Moreover, none of the current systems and methods allow a user to dial an abbreviated telephone number to access services from a subscriber. Currently, the user must lookup, write down, or memorize a full seven or more digit number for each department or service group that they may need information from.
Therefore, a system and method is needed that allows users to dial one telephone number and reach a single point of contact for information and services provided by a subscriber, and that provides an abbreviated telephone number that is easy to remember for accessing the single point of contact for services from the subscriber.