Method and apparatus for emulating a telephone with a modem and

Details Method and apparatus for emulating a telephone with a modem and Method and apparatus for emulating a telephone with a modem and

1993-09-15

1996-07-02

Chan, Jason

Telephonic communications

Telephone line or system combined with diverse electrical...

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

379 88, 379100, 379442, H04M 1100, H04M 164, H04M 100

Patent

active

055331050

ABSTRACT:
An emulator circuit is provided for allowing a data/fax/voice modem, a host computer, and a telephone headset to emulate the functions of a telephone. For voice communication, the emulator circuit connects the telephone headset to the telephone line. For automated data/fax/voice communications, the emulator circuit connects the modem to the telephone line. Two specific embodiments of the emulator circuit are described. In one, the emulator circuit is configured from analog circuit components connected to the modem. In the other, the emulator circuit is an integrated circuit component of the modem. In both embodiments, the provision of the emulator circuit obviates the need to provide a separate telephone for handling voice telephone conversations.

REFERENCES:
patent: 4800439 (1989-01-01), Yoshino
patent: 5036513 (1991-07-01), Greenblatt
patent: 5058155 (1991-10-01), Larsen
patent: 5131019 (1992-07-01), Sheffer et al.
patent: 5283819 (1994-02-01), Glick et al.
Faxmodems, Rockwell International, pp. 18-19.
RC224ATF, Single Device Data/Fax Modem with "AT" Commands; Rockwell International, p. 2.
R96DFX 9600 bps Monofax.RTM. Modem with Error Detection and DTMF Reception, Rockwell International, Document No. 29200N60, Order No. MD60, Rev. 1, Nov. 1990.
9600 bps Monofax.RTM. Modem Designer's Guide; Rockwell International, Digital Communications Division, Order No. 820, Rev. 2, Dec. 1991.

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