Reconfigurable modem for a computer or the like

Details Reconfigurable modem for a computer or the like Reconfigurable modem for a computer or the like

1990-09-14

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...

379441, 379 93, H04M 1100

Patent

active

051346486

ABSTRACT:
A modem (200) for connecting a computer (100) or the like to a telephone network for data transmission purposes, the modem being of the type including a modulation/demodulation circuit for converting the digital signals of the computer into analog signals capable of being conveyed by the telephone network and vice versa, a computer interface circuit, and a telephone line interface circuit specially designed for a telephone network of a given type. The modem is characterized in that it comprises: a main circuit (210) designed to be placed inside the computer box (102) and incorporating the modulation/demodulation circuit (214) and the computer interface circuit (216); an auxiliary circuit (220) situated in a box (225) external to the computer box and incorporating the telephone line interface circuit; and disconnectable connection means (Cl, 230, 232) between the auxiliary circuit and the main circuit. The modem further includes means for at least periodically transferring an identification code from the auxiliary circuit to the main circuit, the identification code being stored in said auxiliary circuit and being representative of said given type of telephone network, means being provided in the main circuit for adapting the operating characteristics of said main circuit to said given type of network.

REFERENCES:
patent: 4841561 (1989-06-01), Hill
patent: 4868863 (1989-09-01), Hartley et al.

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