The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 25, 2000
Filed:
May. 02, 1997
Volker Werbus, Gilching, DE;
Alcatel Alsthom Compagnie Generale d'Electricite, Paris, FR;
Abstract
To be able to utilize the advantages of a cordless system based on the DECT standard as well as the advantages of a cellular mobile radio system based on the GSM standard, dual-mode units are known which switch automatically to the lower cost standard. The expense of such units and of the necessary additional circuits in the network infrastructure is avoided when the mobile unit and a mobile unit adapter are equipped with an infrared interface, whereby all the necessary information for the man-machine communication are transmitted independently of the standards. In this way it is possible to access the GSM mobile radio network without engaging the network infrastructure, for example with a DECT mobile unit via a GSM mobile unit adapter. The infrared interface circuit, which essentially comprises an infrared transceiver (1.1, 2.1), a codec (1.3, 2.3) and a digital signal processor (1.2, 2.2), transmits the speech or potentially data as well, the content of the display read-out and the information via respectively activated keys.