JPS5673956A - Callout system for telephone set - Google Patents

Callout system for telephone set

Info

Publication number
JPS5673956A
JPS5673956A JP15114779A JP15114779A JPS5673956A JP S5673956 A JPS5673956 A JP S5673956A JP 15114779 A JP15114779 A JP 15114779A JP 15114779 A JP15114779 A JP 15114779A JP S5673956 A JPS5673956 A JP S5673956A
Authority
JP
Japan
Prior art keywords
signal
callout
main device
telephone set
control signal
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
JP15114779A
Other languages
Japanese (ja)
Inventor
Shuichi Nishimuta
Kensaku Yoshizawa
Hiroshi Ooyama
Akihiko Suzuki
Noriyoshi Kobayakawa
Masaaki Kato
Juichi Tanabe
Setsuo Oshima
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.)
HASEGAWA DENKI SEISAKUSHO KK
NAKAYO TSUSHINKI KK
Meisei Electric Co Ltd
NEC Platforms Ltd
Iwatsu Electric Co Ltd
Nippon Telegraph and Telephone Corp
Taiko Electric Works Ltd
Kanda Tsushin Kogyo Co Ltd
Nakayo Telecommunications Inc
Original Assignee
HASEGAWA DENKI SEISAKUSHO KK
NAKAYO TSUSHINKI KK
Meisei Electric Co Ltd
Iwatsu Electric Co Ltd
Nippon Telegraph and Telephone Corp
Taiko Electric Works Ltd
Kanda Tsushin Kogyo Co Ltd
Nakayo Telecommunications Inc
Nitsuko 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 HASEGAWA DENKI SEISAKUSHO KK, NAKAYO TSUSHINKI KK, Meisei Electric Co Ltd, Iwatsu Electric Co Ltd, Nippon Telegraph and Telephone Corp, Taiko Electric Works Ltd, Kanda Tsushin Kogyo Co Ltd, Nakayo Telecommunications Inc, Nitsuko Corp filed Critical HASEGAWA DENKI SEISAKUSHO KK
Priority to JP15114779A priority Critical patent/JPS5673956A/en
Publication of JPS5673956A publication Critical patent/JPS5673956A/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

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Sub-Exchange Stations And Push- Button Telephones (AREA)

Abstract

PURPOSE:To simplify the circuit constitution, by commonly using the signal lines for callout signal and control signal, between a main device and each telephone set. CONSTITUTION:Each of a plurality of telephone sets TL1-TLn connected in parallel with a main device ME, is provided with circuits A1-An which amplify the callout signal from the main device ME, and speakers SP1-SPn to transmit the callout signal and the control signal of the amplifying circuit from the main device ME. In this case, the callout signal and the control signal are transmitted through the use of signal lines L1-Ln.
JP15114779A 1979-11-21 1979-11-21 Callout system for telephone set Pending JPS5673956A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15114779A JPS5673956A (en) 1979-11-21 1979-11-21 Callout system for telephone set

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15114779A JPS5673956A (en) 1979-11-21 1979-11-21 Callout system for telephone set

Publications (1)

Publication Number Publication Date
JPS5673956A true JPS5673956A (en) 1981-06-19

Family

ID=15512392

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15114779A Pending JPS5673956A (en) 1979-11-21 1979-11-21 Callout system for telephone set

Country Status (1)

Country Link
JP (1) JPS5673956A (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50124507A (en) * 1974-03-19 1975-09-30
JPS51101402A (en) * 1975-03-05 1976-09-07 Iwatsu Electric Co Ltd
JPS5234601A (en) * 1975-09-12 1977-03-16 Iwatsu Electric Co Ltd Calling circuit

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50124507A (en) * 1974-03-19 1975-09-30
JPS51101402A (en) * 1975-03-05 1976-09-07 Iwatsu Electric Co Ltd
JPS5234601A (en) * 1975-09-12 1977-03-16 Iwatsu Electric Co Ltd Calling circuit

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