JPS5651150A - Dial confirmation tone circuit - Google Patents

Dial confirmation tone circuit

Info

Publication number
JPS5651150A
JPS5651150A JP12739179A JP12739179A JPS5651150A JP S5651150 A JPS5651150 A JP S5651150A JP 12739179 A JP12739179 A JP 12739179A JP 12739179 A JP12739179 A JP 12739179A JP S5651150 A JPS5651150 A JP S5651150A
Authority
JP
Japan
Prior art keywords
dial
contact
circuit
push
button
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
JP12739179A
Other languages
Japanese (ja)
Other versions
JPS5814114B2 (en
Inventor
Yuji Tsuruga
Yutaka Nishino
Makoto Yoshitoshi
Akinobu Tomimori
Shiro Kotake
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
Iwatsu Electric Co Ltd
NEC Corp
Nippon Telegraph and Telephone Corp
Original Assignee
Toshiba Corp
Iwatsu Electric Co Ltd
NEC Corp
Nippon Telegraph and Telephone Corp
Tokyo Shibaura Electric Co Ltd
Nippon 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, Iwatsu Electric Co Ltd, NEC Corp, Nippon Telegraph and Telephone Corp, Tokyo Shibaura Electric Co Ltd, Nippon Electric Co Ltd filed Critical Toshiba Corp
Priority to JP12739179A priority Critical patent/JPS5814114B2/en
Publication of JPS5651150A publication Critical patent/JPS5651150A/en
Publication of JPS5814114B2 publication Critical patent/JPS5814114B2/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/26—Devices for calling a subscriber
    • H04M1/30—Devices which can set up and transmit only one digit at a time
    • H04M1/50—Devices which can set up and transmit only one digit at a time by generating or selecting currents of predetermined frequencies or combinations of frequencies

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)

Abstract

PURPOSE:To make it possible to set arbitrarily the DC characteristic of the dial state of the telephone set circuit, by giving the degrees of freedom to setting the DC current flowed to the dial confirmation tone circuit. CONSTITUTION:When the push-button of the push-button dial is depressed, meter contact M of switch SW is connected to remote control contact C, and the base current is applied through resistor RB to turn on switching element Q just before break contact B is disconnected from contact C. The DC current is flowed through varister VR, resistor RS, switching element Q and constant-voltage circuit ZD. Since push- button dial oscillating circuit PBOSC and transmitter T are in parallel with each other, the impedance of VR does not become small considerably though confirmation tone is small, and click tone can be reduced because DC change across contact points P1-P2 is small.
JP12739179A 1979-10-04 1979-10-04 Dial confirmation sound circuit Expired JPS5814114B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12739179A JPS5814114B2 (en) 1979-10-04 1979-10-04 Dial confirmation sound circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12739179A JPS5814114B2 (en) 1979-10-04 1979-10-04 Dial confirmation sound circuit

Publications (2)

Publication Number Publication Date
JPS5651150A true JPS5651150A (en) 1981-05-08
JPS5814114B2 JPS5814114B2 (en) 1983-03-17

Family

ID=14958825

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12739179A Expired JPS5814114B2 (en) 1979-10-04 1979-10-04 Dial confirmation sound circuit

Country Status (1)

Country Link
JP (1) JPS5814114B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0361496A2 (en) * 1988-09-30 1990-04-04 Nec Corporation Dialing confirmation tone output apparatus and method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0361496A2 (en) * 1988-09-30 1990-04-04 Nec Corporation Dialing confirmation tone output apparatus and method

Also Published As

Publication number Publication date
JPS5814114B2 (en) 1983-03-17

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