Area wide centrex
February 29, 2012. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesTelecommunications call back system Telephone communications control system having a plurality of remote switching units Data base communication call processing method Method of providing person locator service Distributed CBX system employing packet network Method of providing virtual private network telephone service Communication system having abbreviated dialing access Method for customer definable telephone capability Telephone office service assist and handoff Telecommunication system, in particular telephone system InventorsAssigneeApplicationNo. 843040 filed on 02/29/1992US Classes:379/221.09, Service control point (SCP, ISCP, external database)370/385, Having a separate signaling network370/426, Having a signaling feature379/114.05, Special service fees (e.g., customized feature)379/114.21, Redirect billing379/114.29, Using more than one advanced intelligent elements (e.g., accessing multiple AIN databases)379/201.03, Creation of service (e.g., using object oriented programming, primitive, function)379/221.1, Signal transfer point (STP, ISTP)379/230Signalling path distinct from trunk (e.g., CCIS)ExaminersPrimary: Brown, Thomas W.Attorney, Agent or FirmInternational ClassesH04M 003/58H04M 007/06 H04Q 011/04 AbstractThe Area Wide Centrex service is provided in a telephone communication network having a plurality of interconnected central office switching systems, each at a different location. Each of the central office switching systems connects to a number of local telephone lines, a number of which can be designated as members of a business group for a particular customer. Area Wide Centrex extends a number of service features to the business group over a broad area through multiple central offices by taking the programming intelligence capacity out of the central offices and moving it to a central point. Service features such as call routing are controlled by data stored in a central data base. Establishing or changing services for one or all of a particular customer's lines requires only reprogramming that customer's data in the central data base, without the need to reprogram each central office switch. Also, Centrex services such as extension number type intercom dialing and call transfer can be extended across provided to groups of lines connected to different exchanges.Other References
Field of SearchSignalling path distinct from trunk (e.g., CCIS) | |
