JPS5465404A - Identifying circuit for dial-in pulse signal and calling signal of telephone set - Google Patents

Identifying circuit for dial-in pulse signal and calling signal of telephone set

Info

Publication number
JPS5465404A
JPS5465404A JP13223277A JP13223277A JPS5465404A JP S5465404 A JPS5465404 A JP S5465404A JP 13223277 A JP13223277 A JP 13223277A JP 13223277 A JP13223277 A JP 13223277A JP S5465404 A JPS5465404 A JP S5465404A
Authority
JP
Japan
Prior art keywords
pulse
dial
signal
input signal
calling
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.)
Granted
Application number
JP13223277A
Other languages
Japanese (ja)
Other versions
JPS5549473B2 (en
Inventor
Kazuhiko Okutsu
Norio Kataoka
Harumitsu Shimizu
Hironari Inagaki
Goro Izumi
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.)
Nippon Telegraph and Telephone Corp
Oki Electric Industry Co Ltd
Tamura Electric Works Ltd
Original Assignee
Nippon Telegraph and Telephone Corp
Oki Electric Industry Co Ltd
Tamura Electric Works 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 Nippon Telegraph and Telephone Corp, Oki Electric Industry Co Ltd, Tamura Electric Works Ltd filed Critical Nippon Telegraph and Telephone Corp
Priority to JP13223277A priority Critical patent/JPS5465404A/en
Publication of JPS5465404A publication Critical patent/JPS5465404A/en
Publication of JPS5549473B2 publication Critical patent/JPS5549473B2/ja
Granted 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)

Abstract

PURPOSE:To prevent the malfunction of the facsimile device or the like through identification between the calling signal and the dial-in pulse by monitoring the frequency and the time of the input signal via the timer circuit. CONSTITUTION:The input signals of the dial-in pulse and calling signal are supplied to pulse formation circuit 2 via half-wave rectifier circuit 1. The pulse is delivered with every period of the input signal. With his pulse, the frequency of the input signal is monitored through timer circuit 3, and the continuous transmission time of the input signal is monitored through timer circuit 4 based on the monitor output. As a result, an identification becomes possible between the supplied dial-in pulse of a high or low frequency and the calling signal.
JP13223277A 1977-11-04 1977-11-04 Identifying circuit for dial-in pulse signal and calling signal of telephone set Granted JPS5465404A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13223277A JPS5465404A (en) 1977-11-04 1977-11-04 Identifying circuit for dial-in pulse signal and calling signal of telephone set

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13223277A JPS5465404A (en) 1977-11-04 1977-11-04 Identifying circuit for dial-in pulse signal and calling signal of telephone set

Publications (2)

Publication Number Publication Date
JPS5465404A true JPS5465404A (en) 1979-05-26
JPS5549473B2 JPS5549473B2 (en) 1980-12-12

Family

ID=15076451

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13223277A Granted JPS5465404A (en) 1977-11-04 1977-11-04 Identifying circuit for dial-in pulse signal and calling signal of telephone set

Country Status (1)

Country Link
JP (1) JPS5465404A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61167230A (en) * 1985-01-18 1986-07-28 Sanyo Electric Co Ltd Call signal generating device of radio telephone set
EP0430217A2 (en) * 1989-11-29 1991-06-05 Sharp Kabushiki Kaisha Facsimile device and automatic receiving method thereof
US5537657A (en) * 1993-12-13 1996-07-16 Hewlett-Packard Company Telecommunications device with means for learning and responding to a distinctive ring cadence

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61167230A (en) * 1985-01-18 1986-07-28 Sanyo Electric Co Ltd Call signal generating device of radio telephone set
EP0430217A2 (en) * 1989-11-29 1991-06-05 Sharp Kabushiki Kaisha Facsimile device and automatic receiving method thereof
US5323451A (en) * 1989-11-29 1994-06-21 Sharp Kabushiki Kaisha Facsimile device and automatic receiving method thereof
US5537657A (en) * 1993-12-13 1996-07-16 Hewlett-Packard Company Telecommunications device with means for learning and responding to a distinctive ring cadence

Also Published As

Publication number Publication date
JPS5549473B2 (en) 1980-12-12

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