Pay station telephone coin box apparatus

Details Pay station telephone coin box apparatus Pay station telephone coin box apparatus

1988-06-22

1990-05-15

Lev, Robert

Telephonic communications

With check operated control

Coin signalling or control

379123, 379145, H04M 1702

Patent

active

049264680

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: 4124774 (1978-11-01), Zarouni
patent: 4263482 (1981-04-01), Serres et al.
patent: 4599492 (1986-07-01), Otten
patent: 4625078 (1986-11-01), Crouch et al.
patent: 4736444 (1988-04-01), Dhein

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