In an embodiment of the present invention, there is a ring control device comprising a switch, a voltage control device in electrical series with the switch, and a first plug for receiving a first electrical signal, the first electrical signal comprising a first voltage and a second voltage, the first plug disposed in series with and before the voltage control device. The ring control device also includes a second plug for outputting at least one of the first and second voltages of the first electrical signal, the second plug disposed in series with and after the switch. In the ring control device, the voltage control device prevents one of the first and second voltages from passing to the second plug when the switch is in a predetermined position.
Dr. Hummel graduated from the Medical College of Wisconsin School of Medicine in 1988. She works in Milwaukee, WI and specializes in Family Medicine. Dr. Hummel is affiliated with Aurora West Allis Medical Center.
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Barbara Hummel
About:
Courage & Renewal facilitatorConsult in areas of leadership and collaboration
West Allis, Wisconsinowner/CEO at Barbara A Hummel MD SC Solo family physician in West Allis, Wisconsin. Married with 4 children and 7 grandchildren. Active in local and state medical societies and speciality... Solo family physician in West Allis, Wisconsin. Married with 4 children and 7 grandchildren. Active in local and state medical societies and speciality society.