Pay station telephone call routing apparatus

Details Pay station telephone call routing apparatus Pay station telephone call routing apparatus

1988-06-22

1990-05-15

Lev, Robert

Telephonic communications

With check operated control

At terminal station

379132, 379123, 379 36, H01M 1700

Patent

active

049264699

ABSTRACT:
An interface (10) is disclosed for coupling a conventional pay station telephone (12) to a telephone switching system (16). The interface (10) provides supervision signal detection functions normally provided by a switching system, and thus can be connected thereto by a less costly business line (28). The interface includes processor controlled tone generators (72, 76) and detectors (73, 74, 81, 106, 108) for detecting tones and voltages transmitted by either the telephone (12) or the switching system (16). The interface (10) further includes a detector (106) and a procedure (FIG. 8) for providing an answer call indication. Coin collection or return is controlled by the interface (10) depending on the status of the call which is also determined by the interface (10).

REFERENCES:
patent: 4768223 (1988-08-01), Kinoshita et al.

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