JPS5776957A - Communication terminal additional device - Google Patents

Communication terminal additional device

Info

Publication number
JPS5776957A
JPS5776957A JP55153083A JP15308380A JPS5776957A JP S5776957 A JPS5776957 A JP S5776957A JP 55153083 A JP55153083 A JP 55153083A JP 15308380 A JP15308380 A JP 15308380A JP S5776957 A JPS5776957 A JP S5776957A
Authority
JP
Japan
Prior art keywords
control circuit
circuit
connection
transmission
communication
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP55153083A
Other languages
Japanese (ja)
Inventor
Koichi Kurihara
Yoshiaki Ueno
Ryoho Ando
Osamu Yamauchi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fujitsu Ltd
Original Assignee
Fujitsu Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP55153083A priority Critical patent/JPS5776957A/en
Publication of JPS5776957A publication Critical patent/JPS5776957A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/02—Details
    • H04L12/06—Answer-back mechanisms or circuits

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)

Abstract

PURPOSE:To prevent the leakage of information due to mis-connection at communication network, by confirming the connection between main communication terminal additional devices ahead the information transfer at communication and performing the communication thereafter only for those result is correct. CONSTITUTION:An opposing address number inputted from a keyboard 1 is given to a transmission control circuit 6 through a switch control circuit 5. The citcuit 6 picks up the key information from a number key corresponding memory 8 and gives to a reception control circuit. Simultaneously, the circuit 6 transmits the opposing number to the communication network side through a transmission register 7. The response signal of a response circuit 17 returned from the incoming side enters a reception control circuit 13 through a reception register 14 for confirmaton. The key information of a key information memory 16 is collated at the circuit 13. When the result is normal, the instruction of transmission of a transmission start signal to the circuit 6, disconnection from the main device to a terminal control circuit 15, connection instruction between the line and the terminal, and display to a connection display device 9 are made.
JP55153083A 1980-10-31 1980-10-31 Communication terminal additional device Pending JPS5776957A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55153083A JPS5776957A (en) 1980-10-31 1980-10-31 Communication terminal additional device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55153083A JPS5776957A (en) 1980-10-31 1980-10-31 Communication terminal additional device

Publications (1)

Publication Number Publication Date
JPS5776957A true JPS5776957A (en) 1982-05-14

Family

ID=15554598

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55153083A Pending JPS5776957A (en) 1980-10-31 1980-10-31 Communication terminal additional device

Country Status (1)

Country Link
JP (1) JPS5776957A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5859644A (en) * 1981-06-05 1983-04-08 エクサイド・エレクトロニクス・インタ−ナシヨナル・コ−ポレ−シヨン Computer communication controller
JPS5950654A (en) * 1982-09-16 1984-03-23 Taiko Denki Seisakusho:Kk Key word set system of remote monitoring device
JPH0543300U (en) * 1991-03-27 1993-06-11 綜合警備保障株式会社 Mechanical security device

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5859644A (en) * 1981-06-05 1983-04-08 エクサイド・エレクトロニクス・インタ−ナシヨナル・コ−ポレ−シヨン Computer communication controller
JPH0356027B2 (en) * 1981-06-05 1991-08-27
JPS5950654A (en) * 1982-09-16 1984-03-23 Taiko Denki Seisakusho:Kk Key word set system of remote monitoring device
JPH0543300U (en) * 1991-03-27 1993-06-11 綜合警備保障株式会社 Mechanical security device

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