1976-05-26
1977-08-02
Olms, Douglas W.
179 63R, H04M 124
Patent
active
040397688
ABSTRACT:
A pay telephone station monitor system which monitors the operation of a pay telephone station and detects malfunction of the pay station equipment. An alarm signal is produced upon detection of such malfunction which signal is transmitted to a central office to produce a visual output display upon predetermined occurrences of the alarm signals. The monitor system senses the impedances of the transmitter and receiver elements in the handset of the telephone, the time delay between removing the handset from the cradle and the occurrence of dial tone, and the delay between the onset of dial tone and dial tone break. The central office equipment produces a hierarchy of visual indications indicative of the number of times faults have occurred, and also gives a time reading since the occurrence of an initial fault or since the last successful use of the pay station. A coin box monitor can also be included to detect the height of coins in a coin box and transmit a signal to the central office when a predetermined height has been reached.
REFERENCES:
patent: 3161731 (1964-12-01), Seeley
patent: 3449524 (1969-06-01), Pharis
patent: 3496300 (1970-02-01), Stokes
patent: 3793490 (1974-02-01), Karras
patent: 3813500 (1974-05-01), Roberts
patent: 3829618 (1974-08-01), Brandon
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