JPS5220708A - Button telephone set - Google Patents

Button telephone set

Info

Publication number
JPS5220708A
JPS5220708A JP50097027A JP9702775A JPS5220708A JP S5220708 A JPS5220708 A JP S5220708A JP 50097027 A JP50097027 A JP 50097027A JP 9702775 A JP9702775 A JP 9702775A JP S5220708 A JPS5220708 A JP S5220708A
Authority
JP
Japan
Prior art keywords
telephone set
button telephone
button
simplification
wiring
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
JP50097027A
Other languages
Japanese (ja)
Inventor
Takashi Oyamada
Mitsuo Masuda
Toshiji Kinoshita
Noritomo Arai
Yoshio Shinoda
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.)
Tamura Electric Works Ltd
Original Assignee
Tamura Electric Works 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 Tamura Electric Works Ltd filed Critical Tamura Electric Works Ltd
Priority to JP50097027A priority Critical patent/JPS5220708A/en
Priority to US05/711,975 priority patent/US4125749A/en
Publication of JPS5220708A publication Critical patent/JPS5220708A/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
    • H04M1/71—Substation extension arrangements

Abstract

PURPOSE:Simplification of the wiring of button telephone set by connecting the main unit and each telephone set with two pairs of cable.
JP50097027A 1975-08-09 1975-08-09 Button telephone set Pending JPS5220708A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP50097027A JPS5220708A (en) 1975-08-09 1975-08-09 Button telephone set
US05/711,975 US4125749A (en) 1975-08-09 1976-08-05 Key telephone systems

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP50097027A JPS5220708A (en) 1975-08-09 1975-08-09 Button telephone set

Publications (1)

Publication Number Publication Date
JPS5220708A true JPS5220708A (en) 1977-02-16

Family

ID=14180944

Family Applications (1)

Application Number Title Priority Date Filing Date
JP50097027A Pending JPS5220708A (en) 1975-08-09 1975-08-09 Button telephone set

Country Status (1)

Country Link
JP (1) JPS5220708A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5213706A (en) * 1975-07-23 1977-02-02 Kanda Tsushin Kogyo Kk Key telephone system

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5213706A (en) * 1975-07-23 1977-02-02 Kanda Tsushin Kogyo Kk Key telephone system

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