JPS51132905A - Telephone call apparatus - Google Patents

Telephone call apparatus

Info

Publication number
JPS51132905A
JPS51132905A JP5826875A JP5826875A JPS51132905A JP S51132905 A JPS51132905 A JP S51132905A JP 5826875 A JP5826875 A JP 5826875A JP 5826875 A JP5826875 A JP 5826875A JP S51132905 A JPS51132905 A JP S51132905A
Authority
JP
Japan
Prior art keywords
telephone call
call apparatus
econominize
miniaturize
simplify
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
JP5826875A
Other languages
Japanese (ja)
Other versions
JPS5439089B2 (en
Inventor
Shigeharu Tango
Mitsuru Hamada
Yasushi Ishida
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.)
TOEI DENKI KOGYO KK
TOUEI DENKI KOUGIYOU KK
Original Assignee
TOEI DENKI KOGYO KK
TOUEI DENKI KOUGIYOU KK
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 TOEI DENKI KOGYO KK, TOUEI DENKI KOUGIYOU KK filed Critical TOEI DENKI KOGYO KK
Priority to JP5826875A priority Critical patent/JPS51132905A/en
Publication of JPS51132905A publication Critical patent/JPS51132905A/en
Publication of JPS5439089B2 publication Critical patent/JPS5439089B2/ja
Granted 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 simplify the circuit constitution of the telephone call apparatus, to miniaturize and to econominize the apparatus by decreasing of the parts number, and, also, to improve the electric sound conversion efficiency.
JP5826875A 1975-05-14 1975-05-14 Telephone call apparatus Granted JPS51132905A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5826875A JPS51132905A (en) 1975-05-14 1975-05-14 Telephone call apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5826875A JPS51132905A (en) 1975-05-14 1975-05-14 Telephone call apparatus

Publications (2)

Publication Number Publication Date
JPS51132905A true JPS51132905A (en) 1976-11-18
JPS5439089B2 JPS5439089B2 (en) 1979-11-26

Family

ID=13079413

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5826875A Granted JPS51132905A (en) 1975-05-14 1975-05-14 Telephone call apparatus

Country Status (1)

Country Link
JP (1) JPS51132905A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53119810U (en) * 1977-02-28 1978-09-22

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53119810U (en) * 1977-02-28 1978-09-22

Also Published As

Publication number Publication date
JPS5439089B2 (en) 1979-11-26

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