Telephonic communications – With check operated control – Fraud or interference prevention
Patent
1995-06-20
1998-10-06
Kuntz, Curtis
Telephonic communications
With check operated control
Fraud or interference prevention
379155, 379189, 455565, H04M 1100, H04M 1700, H04M 300
Patent
active
058189165
ABSTRACT:
A cellular paystation system has a transceiver, paystation and an interface. The cellular paystation system operates to prevent return dial tone fraud by providing from the interface a first dial tone to a calling party using the paystation when an off-hook condition is first detected at the paystation by the interface, and then preventing another dial tone from being provided to the calling party until an on-hook condition of the calling party is detected by the interface at the paystation.
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"AB3X Cellular Inferface Owner's Manual", 1987, pp. 1-17; Morrison & Dempsey Communications.
Betts Steven E.
Turner Scott G.
Vogl Allen W.
Young Thomas D.
Kuntz Curtis
Shankar Vijay
Technology Service Group
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