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Patent Searching and Data


Title:
MOBILE OBJECT DATA COMMUNICATION SYSTEM
Document Type and Number:
Japanese Patent JPH0846566
Kind Code:
A
Abstract:

PURPOSE: To attain data communication by providing an interface device and a portable telephone set operated in the voice band, digital and analog mode with an instruction from an information processing unit so as to connect an information processing unit and the digital portable telephone set regardless of the analog or digital system.

CONSTITUTION: The voice band mode is set to a controller 12a of an interface device 12 by an information processing unit 10. A switch circuit 12e is thrown to the position (b) and a switch circuit 12f is thrown to the position (a). Furthermore, a controller 12a sends an instruction to throw the switch circuits 14a, 14g respectively to the positions b, a to a CPG 14c via an SIO 14b of a digital mode telephone set 14 via a data link section 12d to make changeover. The transmission data from the unit 10 are given to a MODEM 12b via the controller 12a and modulated into a voice band analog signal and given to a PCM CODEC 12c and converted into a digital signal and given to an ADPCM CODEC 14h of the portable telephone set 14 via a digital signal line 22. The CODEC 14f compresses the signal and converts it into an ADPCM digital signal and the result is sent to a base station 15 from an antenna 14j.


Inventors:
TAMURA KATSUMI
Application Number:
JP1994000178941
Publication Date:
February 16, 1996
Filing Date:
July 29, 1994
Export Citation:
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Assignee:
TOSHIBA CORP
International Classes:
H04B7/26; H04M11/00; (IPC1-7): H04B7/26; H04M11/00
Attorney, Agent or Firm:
鈴江 武彦