JPS5511646A - Tone visible display system for telephone set - Google Patents

Tone visible display system for telephone set

Info

Publication number
JPS5511646A
JPS5511646A JP8433878A JP8433878A JPS5511646A JP S5511646 A JPS5511646 A JP S5511646A JP 8433878 A JP8433878 A JP 8433878A JP 8433878 A JP8433878 A JP 8433878A JP S5511646 A JPS5511646 A JP S5511646A
Authority
JP
Japan
Prior art keywords
receiver
tone
visible display
turned
switch
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
JP8433878A
Other languages
Japanese (ja)
Inventor
Nobuhiro Kataoka
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP8433878A priority Critical patent/JPS5511646A/en
Publication of JPS5511646A publication Critical patent/JPS5511646A/en
Pending 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
    • H04M1/82—Line monitoring circuits for call progress or status discrimination

Landscapes

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

Abstract

PURPOSE:To secure the visible display in accordance with the types of tones and then to facilitate the operation for calling by giving light emission to the light emitting element with the AC component of the tone. CONSTITUTION:Visible display unit K is inserted in parallel to telephone receiver T into the ordinary telephone set comprising dial mechanism DS, bell B, transmitter microphone T, telephone receiver R and others. Then switch SW of unit K is turned on with receiver R picked up, and thus relay RL turns on switch rl1 and off rl2 each. Then light emission is given to light emitting disde P with the AC component contained in the signal via conductance L and in accordance with the dial tone, the ringing and the busy tone each. Thus the types of tones can be identified by the transmittent state of the light emission without fitting the receiver to the ear. When the called subscriber picks up the handset, relay RL becomes inactive to secure the talking possible state under which switch rl1 turned off and rl2 turned on each.
JP8433878A 1978-07-11 1978-07-11 Tone visible display system for telephone set Pending JPS5511646A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8433878A JPS5511646A (en) 1978-07-11 1978-07-11 Tone visible display system for telephone set

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8433878A JPS5511646A (en) 1978-07-11 1978-07-11 Tone visible display system for telephone set

Publications (1)

Publication Number Publication Date
JPS5511646A true JPS5511646A (en) 1980-01-26

Family

ID=13827708

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8433878A Pending JPS5511646A (en) 1978-07-11 1978-07-11 Tone visible display system for telephone set

Country Status (1)

Country Link
JP (1) JPS5511646A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57138453U (en) * 1981-02-25 1982-08-30
JPS61121053U (en) * 1985-01-17 1986-07-30
JPS61218252A (en) * 1985-03-22 1986-09-27 Sanyo Electric Co Ltd Display circuit for telephone set
JPS62167441U (en) * 1986-04-11 1987-10-23
JPH0373059U (en) * 1989-11-16 1991-07-23
JPH0631253U (en) * 1992-09-29 1994-04-22 アイホン株式会社 Telephone with light emitting diode for call display

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57138453U (en) * 1981-02-25 1982-08-30
JPH021977Y2 (en) * 1981-02-25 1990-01-18
JPS61121053U (en) * 1985-01-17 1986-07-30
JPS61218252A (en) * 1985-03-22 1986-09-27 Sanyo Electric Co Ltd Display circuit for telephone set
JPH0422384B2 (en) * 1985-03-22 1992-04-16 Sanyo Electric Co
JPS62167441U (en) * 1986-04-11 1987-10-23
JPH0373059U (en) * 1989-11-16 1991-07-23
JPH0631253U (en) * 1992-09-29 1994-04-22 アイホン株式会社 Telephone with light emitting diode for call display

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