Communications: electrical – Land vehicle alarms or indicators – Internal alarm or indicator responsive to a condition of the...
Patent
1981-08-07
1983-08-16
Rubinson, G. Z.
Communications: electrical
Land vehicle alarms or indicators
Internal alarm or indicator responsive to a condition of the...
34082549, 455 56, G11B 1300
Patent
active
043993303
ABSTRACT:
A communications system, in particular a telephone system, is provided for the connection of mobile subscriber terminal devices via radio links, in which a central and/or sub-central location there are arranged storage devices which, for all of the users, each store an item of information concerning the relevant location of a user. The particular stored item of location information is used to control the switch-through of a connection to be established to the mobile user. The subscriber terminal devices include identification read-out devices for reading user identification cards. The subscriber terminal device temporarily receives the user call code stored on the user identification card which provides the facility of passive access to the user. Facilities are also provided for automatic charge accounting.
REFERENCES:
patent: 3573739 (1971-04-01), Zeitlin
patent: 4178476 (1979-12-01), Frost
patent: 4187398 (1980-02-01), Stark
patent: 4254404 (1981-03-01), White
Monk, N., "Experimental Radio-Telephone . . . ", Proceedings of IEEE, 1951, Aug., pp. 873-881.
Rubinson G. Z.
Schroeder L. C.
Siemens Aktiengesellschaft
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