Portable telephone system using stratified exchange system
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United States of America Patent
Stats
-
May 11, 1993
Issued Date -
N/A
app pub date -
May 10, 1991
filing date -
Oct 15, 1986
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A portable telephone system is disclosed in which a plurality of i-th class exchanges, which accommodate key service units of a plurality of portable telephone sets present in each service area, and at least one (i+1)th class exchange which accommodates the plurality of i-th class exchanges through junction lines, are stratified to form an exchange system so that i=1, 2, 3, . . . , and so that the (i.1)th class exchange covers all service areas. The exchange system has a function whereby information which specifies the home area of each portable telephone set and the portable telephone set in distinction from each other is registered in the i-th class exchange and the (i+1)th class exchange, which administer the home area.
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Family
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