Programmable subscriber set
Patent 4788720 Issued on November 29, 1988. Estimated Expiration Date: 
September 3, 2006. 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.
September 3, 2006. 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 ReferencesGeneral-purpose electronic telephone station set Controllable telephone call annunciator Telephone feature assignment circuit Programmable telephone system Electronic telephone with feature access and speed dialing including loop breaks Communication system having multi-mode line selection buttons Patent #: 4665545 InventorsAssigneeApplicationNo. 06/903143 filed on 09/03/1986US Classes:379/201.04, Display arrangement379/207.11, Service access code379/216.01, Abbreviated dialing or direct call (e.g., hot line)379/354, With called number display379/355.04, Call address signal stored in network379/355.08, Including prefix in the call address signal379/914, PROGRAMMABLE TELEPHONE COMPONENT379/915"Soft" keyExaminersPrimary: Dwyer, James L.Attorney, Agent or FirmInternational ClassesH04M 1/247 (20060101)H04M 3/42 (20060101) Foreign Application Priority Data1986-05-12 CAAbstractA subscriber set for connection via tip and ring leads to a remote communication system such as a PABX or centrex. The remote communication system is capable of implementing a plurality of special features such as hold, call transfer, call forward, etc. The set is comprised of a microprocessor and electronic telephone circuit connected to a plurality of programmable function keys, for generating one or more centrex or PBX special feature access code signals in response to depression of predetermined ones of the keys. An LCD display is connected to the microprocessor for generating prompt signals for indicating implementation of predetermined ones of the special features associated with depression of corresponding ones of the keys. The special feature access code signals are programmed into the set such that the set may be used with a variety of PABX and centrex facilities in lieu of expensive proprietary subscriber sets or awkward and difficult to use standard type 2500 sets.Other References
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