JPS5213706A - Key telephone system - Google Patents

Key telephone system

Info

Publication number
JPS5213706A
JPS5213706A JP8921975A JP8921975A JPS5213706A JP S5213706 A JPS5213706 A JP S5213706A JP 8921975 A JP8921975 A JP 8921975A JP 8921975 A JP8921975 A JP 8921975A JP S5213706 A JPS5213706 A JP S5213706A
Authority
JP
Japan
Prior art keywords
telephone system
key telephone
key
economy
parallel
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
JP8921975A
Other languages
Japanese (ja)
Other versions
JPS5532258B2 (en
Inventor
Minoru Sasai
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.)
KANDA TSUUSHIN KOUGIYOU KK
Kanda Tsushin Kogyo Co Ltd
Original Assignee
KANDA TSUUSHIN KOUGIYOU KK
Kanda Tsushin Kogyo 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 KANDA TSUUSHIN KOUGIYOU KK, Kanda Tsushin Kogyo Co Ltd filed Critical KANDA TSUUSHIN KOUGIYOU KK
Priority to JP8921975A priority Critical patent/JPS5213706A/en
Priority to US05/707,324 priority patent/US4079212A/en
Publication of JPS5213706A publication Critical patent/JPS5213706A/en
Publication of JPS5532258B2 publication Critical patent/JPS5532258B2/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
    • H04M9/02—Arrangements for interconnection not involving centralised switching involving a common line for all parties

Landscapes

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

Abstract

PURPOSE:The main equipment and key telephones are connected in parallel in economy.
JP8921975A 1975-07-23 1975-07-23 Key telephone system Granted JPS5213706A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP8921975A JPS5213706A (en) 1975-07-23 1975-07-23 Key telephone system
US05/707,324 US4079212A (en) 1975-07-23 1976-07-21 Extension telephone system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8921975A JPS5213706A (en) 1975-07-23 1975-07-23 Key telephone system

Publications (2)

Publication Number Publication Date
JPS5213706A true JPS5213706A (en) 1977-02-02
JPS5532258B2 JPS5532258B2 (en) 1980-08-23

Family

ID=13964603

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8921975A Granted JPS5213706A (en) 1975-07-23 1975-07-23 Key telephone system

Country Status (1)

Country Link
JP (1) JPS5213706A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5220708A (en) * 1975-08-09 1977-02-16 Tamura Electric Works Ltd Button telephone set
JPS5287306A (en) * 1976-01-14 1977-07-21 Iwatsu Electric Co Ltd Push-phone type telephone
JPS52139306A (en) * 1976-05-17 1977-11-21 Iwatsu Electric Co Ltd Calling system for key telephone equipment
JPS52153603A (en) * 1976-06-17 1977-12-20 Tamura Electric Works Ltd Master and slave telephone system
JPS5330802A (en) * 1976-09-03 1978-03-23 Meisei Electric Co Ltd Key telephone system
JPS5385104A (en) * 1977-01-06 1978-07-27 Nakayo Telecommunications Privacy circuit for button telephone set

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5220708A (en) * 1975-08-09 1977-02-16 Tamura Electric Works Ltd Button telephone set
JPS5287306A (en) * 1976-01-14 1977-07-21 Iwatsu Electric Co Ltd Push-phone type telephone
JPS5522986B2 (en) * 1976-01-14 1980-06-20
JPS52139306A (en) * 1976-05-17 1977-11-21 Iwatsu Electric Co Ltd Calling system for key telephone equipment
JPS5543663B2 (en) * 1976-05-17 1980-11-07
JPS52153603A (en) * 1976-06-17 1977-12-20 Tamura Electric Works Ltd Master and slave telephone system
JPS5631788B2 (en) * 1976-06-17 1981-07-23
JPS5330802A (en) * 1976-09-03 1978-03-23 Meisei Electric Co Ltd Key telephone system
JPS5438003B2 (en) * 1976-09-03 1979-11-19
JPS5385104A (en) * 1977-01-06 1978-07-27 Nakayo Telecommunications Privacy circuit for button telephone set

Also Published As

Publication number Publication date
JPS5532258B2 (en) 1980-08-23

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