Cordless communication system for a portable computer modem

Details Cordless communication system for a portable computer modem Cordless communication system for a portable computer modem

1996-01-23

1999-08-10

Cumming, William

Telecommunications

Radiotelephone system

Out-of-range indication

37910015, 4552791, 455556, H04Q 720

Patent

active

059373482

ABSTRACT:
A cordless modem comprises a radio pair interfaced to a standard data/fax modem which allows a user of a personal computer to wirelessly connect to a telephone line. One end of the radio pair is a remote unit interfaced to the modem contained within the PC while the other end is a base unit connected to a standard telephone wall jack. This arrangement allows the user the convenience and freedom of using a PC, laptop, personal digital assistant, etc., within several hundred feet of a phone jack without being encumbered by a cord. A warning alarm on the remote unit informs the user when the signal strength between the radio pair is below a threshold value. Additionally, the base unit may be equipped with two spatially separated antennas to help mitigate the effects of signal fading.

REFERENCES:
patent: 4752949 (1988-06-01), Steinbeck et al.
patent: 4996715 (1991-02-01), Mauri et al.
patent: 5237429 (1993-08-01), Zuiss et al.
patent: 5353329 (1994-10-01), Hayashi
patent: 5437055 (1995-07-01), Wheatley, III
patent: 5519763 (1996-05-01), Namekawa

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