Ring tone detection for a telephone system

Details Ring tone detection for a telephone system Ring tone detection for a telephone system

1994-04-12

1995-08-15

Dwyer, James L.

Telephonic communications

Supervisory or control line signaling

Signal reception at substation

379386, 379372, 379377, H04M 100

Patent

active

054426944

ABSTRACT:
A technique for software ring tone detection is disclosed utilizing, in the preferred embodiment, a recursive algorithm. The technique provides flexibility in that a digital signal processor may be reprogrammed to detect ring tone frequencies and amplitudes present in numerous different countries.

REFERENCES:
patent: 4815136 (1989-03-01), Benvenuto
patent: 5109409 (1992-04-01), Bomgardner et al.

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