JPS5691566A - Signal transmission system of key telephone set - Google Patents

Signal transmission system of key telephone set

Info

Publication number
JPS5691566A
JPS5691566A JP16994479A JP16994479A JPS5691566A JP S5691566 A JPS5691566 A JP S5691566A JP 16994479 A JP16994479 A JP 16994479A JP 16994479 A JP16994479 A JP 16994479A JP S5691566 A JPS5691566 A JP S5691566A
Authority
JP
Japan
Prior art keywords
signal
various signals
pass filters
signal transmission
cables
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
JP16994479A
Other languages
English (en)
Japanese (ja)
Other versions
JPS6322119B2 (enrdf_load_stackoverflow
Inventor
Koichi Sekiguchi
Hideaki Naganami
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.)
Iwatsu Electric Co Ltd
Original Assignee
Iwatsu 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 Iwatsu Electric Co Ltd filed Critical Iwatsu Electric Co Ltd
Priority to JP16994479A priority Critical patent/JPS5691566A/ja
Publication of JPS5691566A publication Critical patent/JPS5691566A/ja
Publication of JPS6322119B2 publication Critical patent/JPS6322119B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M9/00—Arrangements for interconnection not involving centralised switching
    • H04M9/002—Arrangements for interconnection not involving centralised switching with subscriber controlled access to a line, i.e. key telephone systems
    • H04M9/005—Arrangements for interconnection not involving centralised switching with subscriber controlled access to a line, i.e. key telephone systems with subscriber controlled access to an exchange line

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Devices For Supply Of Signal Current (AREA)
  • Sub-Exchange Stations And Push- Button Telephones (AREA)
JP16994479A 1979-12-26 1979-12-26 Signal transmission system of key telephone set Granted JPS5691566A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16994479A JPS5691566A (en) 1979-12-26 1979-12-26 Signal transmission system of key telephone set

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16994479A JPS5691566A (en) 1979-12-26 1979-12-26 Signal transmission system of key telephone set

Publications (2)

Publication Number Publication Date
JPS5691566A true JPS5691566A (en) 1981-07-24
JPS6322119B2 JPS6322119B2 (enrdf_load_stackoverflow) 1988-05-10

Family

ID=15895779

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16994479A Granted JPS5691566A (en) 1979-12-26 1979-12-26 Signal transmission system of key telephone set

Country Status (1)

Country Link
JP (1) JPS5691566A (enrdf_load_stackoverflow)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS596693A (ja) * 1982-07-02 1984-01-13 Meisei Electric Co Ltd 簡易電話交換装置の制御信号伝送方式
JPS59131288A (ja) * 1983-01-17 1984-07-28 Iwatsu Electric Co Ltd ボタン電話装置の受信安定化回路
JPS60210092A (ja) * 1984-03-30 1985-10-22 Fujitsu Ltd ボタン電話装置におけるデ−タ伝送方式
JPS63283390A (ja) * 1987-04-23 1988-11-21 アメリカン　テレフォン　アンド　テレグラフ　カムパニー 電話装置

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS438975Y1 (enrdf_load_stackoverflow) * 1964-06-16 1968-04-19
JPS4875104A (enrdf_load_stackoverflow) * 1972-01-10 1973-10-09
JPS5250104A (en) * 1975-10-21 1977-04-21 Nec Corp Ordering communication system by amplified call
JPS52130517A (en) * 1976-04-26 1977-11-01 Kokusai Denshin Denwa Co Ltd Complex communication system

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS438975Y1 (enrdf_load_stackoverflow) * 1964-06-16 1968-04-19
JPS4875104A (enrdf_load_stackoverflow) * 1972-01-10 1973-10-09
JPS5250104A (en) * 1975-10-21 1977-04-21 Nec Corp Ordering communication system by amplified call
JPS52130517A (en) * 1976-04-26 1977-11-01 Kokusai Denshin Denwa Co Ltd Complex communication system

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS596693A (ja) * 1982-07-02 1984-01-13 Meisei Electric Co Ltd 簡易電話交換装置の制御信号伝送方式
JPS59131288A (ja) * 1983-01-17 1984-07-28 Iwatsu Electric Co Ltd ボタン電話装置の受信安定化回路
JPS60210092A (ja) * 1984-03-30 1985-10-22 Fujitsu Ltd ボタン電話装置におけるデ−タ伝送方式
JPS63283390A (ja) * 1987-04-23 1988-11-21 アメリカン　テレフォン　アンド　テレグラフ　カムパニー 電話装置

Also Published As

Publication number Publication date
JPS6322119B2 (enrdf_load_stackoverflow) 1988-05-10

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