JPS5671357A - Detection system for callout number - Google Patents

Detection system for callout number

Info

Publication number
JPS5671357A
JPS5671357A JP14734279A JP14734279A JPS5671357A JP S5671357 A JPS5671357 A JP S5671357A JP 14734279 A JP14734279 A JP 14734279A JP 14734279 A JP14734279 A JP 14734279A JP S5671357 A JPS5671357 A JP S5671357A
Authority
JP
Japan
Prior art keywords
digit
pulse
count
output
circuit
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
JP14734279A
Other languages
Japanese (ja)
Inventor
Masao Yokoyama
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric Co 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP14734279A priority Critical patent/JPS5671357A/en
Publication of JPS5671357A publication Critical patent/JPS5671357A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M11/00—Telephonic communication systems specially adapted for combination with other electrical systems
    • H04M11/06—Simultaneous speech and data transmission, e.g. telegraphic transmission over the same conductors

Landscapes

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

Abstract

PURPOSE:To ensure to prevent the leakage of secrecy of data information, by detecting the hook operation of a telephone set with a hook operation detecting relay, and displaying the callout number through the count of pulse each digit and the forming of code signal. CONSTITUTION:A hook operation detecting relay ...22 is on when a handset of a telephone set 10 is hooked up, and is off when the pulse each digit is output. On the other hand, the contact 22a of the relay 22 closes the circuit every time when the pulse is output, the pulse is fed to a count circuit 281 for count. Further, this count output is fed to a coding circuit 283 with the output of a minimum pause timer circuit 281 to form the coding signal. After this signal is selected 293 for digit, the display of each digit is made, and the callout number is decoded 294. Thus, the leakage of secrecy for data information can surely be prevented by depressing a start button 30 and performing the reception/giving of data in a fascimile device.
JP14734279A 1979-11-14 1979-11-14 Detection system for callout number Pending JPS5671357A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14734279A JPS5671357A (en) 1979-11-14 1979-11-14 Detection system for callout number

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14734279A JPS5671357A (en) 1979-11-14 1979-11-14 Detection system for callout number

Publications (1)

Publication Number Publication Date
JPS5671357A true JPS5671357A (en) 1981-06-13

Family

ID=15428007

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14734279A Pending JPS5671357A (en) 1979-11-14 1979-11-14 Detection system for callout number

Country Status (1)

Country Link
JP (1) JPS5671357A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59211372A (en) * 1983-05-17 1984-11-30 Nec Corp Network controller
JPH01177254A (en) * 1988-01-07 1989-07-13 Canon Inc Communication equipment

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59211372A (en) * 1983-05-17 1984-11-30 Nec Corp Network controller
JPH01177254A (en) * 1988-01-07 1989-07-13 Canon Inc Communication equipment

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