Telephonic communications – Having light wave or ultrasonic link for speech or paging... – Including fiber optic link within telephone network
Patent
1993-08-04
1995-04-11
Kuntz, Curtis
Telephonic communications
Having light wave or ultrasonic link for speech or paging...
Including fiber optic link within telephone network
379 61, 379 60, 455 331, 455 332, H04M 1100, H04Q 700
Patent
active
054066158
ABSTRACT:
A universal wireless radiotelephone communication apparatus is operative in both a first radiotelephone communication system including a first base station having a wide area of coverage, transmitting radiotelephone signals at a first band of frequencies and in a second radiotelephone communication system including a second base station having a localized area of coverage, transmitting radiotelephone signals at a second band of frequencies higher than said first band of frequencies. The second band of frequencies is optimally selected with an offset of less than twice a frequency contained within said first band. The wireless radiotelephone communication apparatus has a common baseband circuitry for operating with both the first base station covering the wide area and with the second base station covering the local area. The common baseband circuitry processing received radiotelephone signals from both base stations and processes signals generated by a user of the handset for transmission to either of these base stations.
REFERENCES:
patent: 4972455 (1990-11-01), Phillips
patent: 4989230 (1991-01-01), Gillig et al.
patent: 5260988 (1993-11-01), Schellinger et al.
Miller, II Robert R.
Partridge, III B. Waring
Russell Jesse E.
Schroeder Robert E.
AT&T Corp.
Chernoff Michael B.
Kuntz Curtis
Steinmetz Alfred G.
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