Data transmitting/receiving apparatus and data communication system

United States Patent U9]

Hidaka

US005583921A [11] Patent Number: [45] Date of Patent:

inn

5,583,921 Dec. 10,1996

[54] DATA TRANSMITTING/RECEIVING

APPARATUS AND DATA COMMUNICATION
SYSTEM

[75] Inventor: Shinji Hidaka, Oome, Japan

[73] Assignee: Casio Computer Co., Ltd., Tokyo, Japan

[21] Appl. No.: 123,644

[22] Filed: Sep. 17,1993

[30] Foreign Application Priority Data

Sep. 21, 1992 [JP] Japan 4-277989

Sep. 21, 1992 [JP] Japan 4-277990

[51] Int. CI.6 H04M 11/00; H04M 1/00

[52] U.S. CI 379/93; 379/96; 379/57;

379/354

[58] Field of Search 379/93, 96, 97,

379/98, 99, 354, 355, 356, 57, 56; 340/825.44, 825.48; 345/121, 141, 123, 142

[56] References Cited

U.S. PATENT DOCUMENTS

4,646,081 2/1987 Tfcunada 345/124

4,799,254 1/1989 Dayton et al 379/97

4,885,771 12/1989 Rabideau et al 379/354

4,980,910 12/1990 Obaetal 379/354

5,043,718 8/1991 Shimura 340/825.44

5,065,309 11/1991 Putnam et al 379/96

5,095,307 3/1992 Shimura et al 379/57

5,146,348 9/1992 Kaneyama 379/96

5,249,220 9/1993 Moskowitz et al 379/96

FOREIGN PATENT DOCUMENTS 403215891 9/1991 Japan 345/142

Primary Examiner—Jason Chan

Attorney, Agent, or Firm—Frishauf, Holtz, Goodman, Langer & Chick

[57] ABSTRACT

When receiving a conversion instruction from a key input section, a CPU reads character data stored in a message memory to a conversion buffer, converts the same into numeric data base on a conversion table, causes a tone signal generator to convert the same into a DTMF signal and outputs the signal to a speaker. When an input instruction of a registration designation and message number is received from the key input section, the CPU forms transmission data for sequentially storing the input information and the numeric data converted from character data in this order, causes to convert the same into the DTMF signal and outputs the signals. At the time of reception of the transmission data, the CPU identifies the content of the data, restores the numeric data into the character data based on an inverse conversion table, retrieves a message number from a TEL bank memory and registers a message into a memory area assigned to the number. With this construction, the troublesome operation of the user for converting the message sentence into numeric data and inputting the same can be omitted, addition and change of a message sentence of the reception side can be made on the transmission side, and the message transmitting function can be achieved by a combination with the telephone.

26 Claims, 15 Drawing Sheets