JPS52127012A - Audible incoming call indicator for telephone - Google Patents

Audible incoming call indicator for telephone

Info

Publication number
JPS52127012A
JPS52127012A JP4339476A JP4339476A JPS52127012A JP S52127012 A JPS52127012 A JP S52127012A JP 4339476 A JP4339476 A JP 4339476A JP 4339476 A JP4339476 A JP 4339476A JP S52127012 A JPS52127012 A JP S52127012A
Authority
JP
Japan
Prior art keywords
telephone
incoming call
call indicator
audible incoming
audible
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
JP4339476A
Other languages
Japanese (ja)
Inventor
Kunio Suzuki
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
Original Assignee
Nippon Telegraph and Telephone 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 Nippon Telegraph and Telephone Corp filed Critical Nippon Telegraph and Telephone Corp
Priority to JP4339476A priority Critical patent/JPS52127012A/en
Publication of JPS52127012A publication Critical patent/JPS52127012A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M19/00—Current supply arrangements for telephone systems
    • H04M19/02—Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone
    • H04M19/04—Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone the ringing-current being generated at the substations

Landscapes

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

Abstract

PURPOSE:To obtain an indication sound with a high reliability, unique tone and with volume variable for a wide range in a small and light weight device by constituting an electronic circuit with a less number of electronic parts to issue sounds from a loud speaker.
JP4339476A 1976-04-16 1976-04-16 Audible incoming call indicator for telephone Pending JPS52127012A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4339476A JPS52127012A (en) 1976-04-16 1976-04-16 Audible incoming call indicator for telephone

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4339476A JPS52127012A (en) 1976-04-16 1976-04-16 Audible incoming call indicator for telephone

Publications (1)

Publication Number Publication Date
JPS52127012A true JPS52127012A (en) 1977-10-25

Family

ID=12662562

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4339476A Pending JPS52127012A (en) 1976-04-16 1976-04-16 Audible incoming call indicator for telephone

Country Status (1)

Country Link
JP (1) JPS52127012A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63245159A (en) * 1987-03-31 1988-10-12 Iwatsu Electric Co Ltd Incoming circuit

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63245159A (en) * 1987-03-31 1988-10-12 Iwatsu Electric Co Ltd Incoming circuit

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