Alarm information transmission system for coin telephone

Details Alarm information transmission system for coin telephone Alarm information transmission system for coin telephone

1985-10-07

1987-02-17

Schreyer, Stafford D.

Telephonic communications

Diagnostic testing, malfunction indication, or electrical...

Testing of subscriber loop or terminal

379 32, 379143, H04M 124

Patent

active

046441093

ABSTRACT:
In a coin telephone, a self diagnosis function and an alarm information transmission function upon formation of a loop in an off-hook mode are utilized. Upon reception of a ringing signal from a maintenance control center, self diagnosis is performed. Upon detection of a failure, a content of the failure and a control number of the coin telephone are sent to the maintenance control center. A failure check for a coin telephone which is not frequently used can be performed from the telephone center without requiring an off-hook operation.

REFERENCES:
patent: 4039768 (1977-08-01), O'Maley
patent: 4582965 (1986-04-01), Lembke
Japanese Patent Laid Open Specification No. Sho 58-156259.
European Patent Publication No. 0012102, Jul. 18, 1984.
Japanese Patent Laid Open Specification No. Sho 58-157249.

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