Acoustic coupler for high-speed modem

Details Acoustic coupler for high-speed modem Acoustic coupler for high-speed modem

1990-09-21

1992-07-28

Dwyer, James L.

Telephonic communications

Telephone line or system combined with diverse electrical...

Having transmission of a digital message signal over a...

379443, H04M 1100, H04M 100

Patent

active

051346494

ABSTRACT:
A data coupler is disclosed for use in connecting a high speed data modem to a typical telephone handset in a high ambient acoustic noise field. The data coupler features a method for conserving, through a magnetic detection process, the high signal to noise ratio (HSNR) available at the telephone line during the acoustic coupling process. The use of magnetic detection prevents the deterioration of acoustic SNR normally expected in a high ambient acoustic noise field.

REFERENCES:
patent: 2831923 (1958-04-01), Block
patent: 4252996 (1981-02-01), D'Agostino
patent: 4288661 (1981-09-01), Krishan
patent: 4415769 (1983-11-01), Gray
patent: 4465903 (1984-08-01), Barber
patent: 4926464 (1990-05-01), Schley-May

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