The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 29, 1993
Filed:
Sep. 06, 1991
Timothy W Aldridge, Somerville, AL (US);
Dean Y Hodge, Madison, AL (US);
Harold G Voce, Hanceville, AL (US);
Universal Data Systems, Inc., Huntsville, AL (US);
Abstract
A line powered data communication apparatus (DCA) includes dual programmed microcontrollers, one being interfaceable with data terminal equipment and the other for governing the operation of modem circuitry of the DCA which is interfaceable to a telephone line of a telephone network. The dual programmed microcontrollers interact with each other over an electrically isolated interface, preferably including optical isolators. Power is derived for the one microcontroller from the signal lines interfacing the data terminal equipment. In addition, power is derived for the other microcontroller and modcircuitry from the telephone line.