Method for a program-controlled telephone switching system in which performance features relating to the setup of a call connection can be initiated from a subscriber station
Patent 4899374 Issued on February 6, 1990. Estimated Expiration Date: 
August 23, 2008. 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.
August 23, 2008. 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 References 3609245 Interoffice callback arrangement Patent #: 4166929 InventorAssigneeApplicationNo. 235175 filed on 08/23/1988US Classes:379/215.01, Call Waiting379/208.01, Priority override (e.g., butt-in)379/209.01Repetitive call attempts (e.g., camp-on-busy, retry)ExaminersPrimary: Dwyer, James L.Attorney, Agent or FirmForeign Patent References
International ClassH04M 003/48Foreign Application Priority Data1987-08-25 DEAbstractA method for automatically connecting an indicating telephone conditions in which when a subscriber calls another subscriber and when the called subscriber's phone is busy, a central controller which includes a memory automatically is subsequently connected after waiting tones and signal tones and cut-in tones have been generated. The method allows automatic connections and cut-ins without redialing by the calling station. | |
