Cordless telephone system for moving conveyances
First Claim
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1. A cordless telephone system for a building in which a moving conveyance is installed, comprising:
- a portable cordless telephone for making calls;
at least one fixed base station installed in said building, for wireless communication with said portable cordless telephone;
a moving-conveyance base station for wireless communication with said portable cordless telephone when said portable cordless telephone is disposed in the moving conveyance; and
a central switch, coupled to said fixed base station and said moving-conveyance base station, for handing off said calls between said fixed base station and said moving-conveyance base station.
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Abstract
A cordless telephone system serves a building with a moving conveyance such as an elevator. The system has at least one portable cordless telephone, at least one fixed base station that communicates with the portable cordless telephone by a wireless circuit outside the moving conveyance, and a moving-conveyance base station that communicates with the portable cordless telephone by a wireless circuit inside the moving conveyance. A central switch routes calls to the fixed base station or moving-conveyance base station according to the field strength of signals received at these stations from the portable cordless telephone.
45 Citations
20 Claims
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1. A cordless telephone system for a building in which a moving conveyance is installed, comprising:
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a portable cordless telephone for making calls; at least one fixed base station installed in said building, for wireless communication with said portable cordless telephone; a moving-conveyance base station for wireless communication with said portable cordless telephone when said portable cordless telephone is disposed in the moving conveyance; and a central switch, coupled to said fixed base station and said moving-conveyance base station, for handing off said calls between said fixed base station and said moving-conveyance base station. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A cordless telephone system for a building having a first moving conveyance and a second moving conveyance that moves adjacent and parallel to the first moving conveyance, comprising:
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a portable cordless telephone for making calls; at least one fixed base station installed in said building, for wireless communication with said portable cordless telephone; a first moving-conveyance base station for wireless communication with said portable cordless telephone when said portable cordless telephone is disposed in said first moving conveyance; a second moving-conveyance base station for wireless communication with said portable cordless telephone when said portable cordless telephone is disposed in said second moving conveyance; and a central switch coupled to said fixed base station, said first moving-conveyance base station, and said second moving-conveyance base station, for handing off calls among said fixed base station, said first moving-conveyance base station, and said second moving-conveyance base station according to signals received from said portable cordless telephone. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20)
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Specification