JPS5410602A - Communication system for key telephone system - Google Patents

Communication system for key telephone system

Info

Publication number
JPS5410602A
JPS5410602A JP7492877A JP7492877A JPS5410602A JP S5410602 A JPS5410602 A JP S5410602A JP 7492877 A JP7492877 A JP 7492877A JP 7492877 A JP7492877 A JP 7492877A JP S5410602 A JPS5410602 A JP S5410602A
Authority
JP
Japan
Prior art keywords
key telephone
communication system
telephone system
communication
save
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
JP7492877A
Other languages
English (en)
Other versions
JPS588798B2 (ja
Inventor
Koichi Sekiguchi
Hikari Takematsu
Kazutada Katsukura
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 JP7492877A priority Critical patent/JPS588798B2/ja
Priority to US05/917,578 priority patent/US4234765A/en
Publication of JPS5410602A publication Critical patent/JPS5410602A/ja
Publication of JPS588798B2 publication Critical patent/JPS588798B2/ja
Expired 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
    • H04M9/022—Multiplex systems

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Sub-Exchange Stations And Push- Button Telephones (AREA)
  • Use Of Switch Circuits For Exchanges And Methods Of Control Of Multiplex Exchanges (AREA)
JP7492877A 1977-06-25 1977-06-25 ボタン電話装置の通話方式 Expired JPS588798B2 (ja)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP7492877A JPS588798B2 (ja) 1977-06-25 1977-06-25 ボタン電話装置の通話方式
US05/917,578 US4234765A (en) 1977-06-25 1978-06-21 Key telephone system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7492877A JPS588798B2 (ja) 1977-06-25 1977-06-25 ボタン電話装置の通話方式

Publications (2)

Publication Number Publication Date
JPS5410602A true JPS5410602A (en) 1979-01-26
JPS588798B2 JPS588798B2 (ja) 1983-02-17

Family

ID=13561498

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7492877A Expired JPS588798B2 (ja) 1977-06-25 1977-06-25 ボタン電話装置の通話方式

Country Status (1)

Country Link
JP (1) JPS588798B2 (ja)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8257322B2 (en) 2010-06-02 2012-09-04 Smiths Medical Asd, Inc. Tip protector for a safety catheter

Also Published As

Publication number Publication date
JPS588798B2 (ja) 1983-02-17

Similar Documents

Publication Publication Date Title
JPS5555650A (en) Telephone communication system
JPS5410602A (en) Communication system for key telephone system
GB2005959B (en) Tone selective key telephone intercom system
JPS5213706A (en) Key telephone system
JPS53109405A (en) Door phone anwering system for button telephone set
JPS5279706A (en) Subscriber line calling system in key telephone unit
JPS5389606A (en) Conference telephone system
JPS5410604A (en) Main wire holding circuit for key telephone system
JPS5279707A (en) Key telephone main unit
JPS5362404A (en) Incoming call charging system
JPS5427702A (en) Overall digital switchboard
JPS5294005A (en) Key telephone system
JPS5410605A (en) Privacy system for key telephone system
JPS53105104A (en) Key telephone set
JPS5422109A (en) Charging system
JPS52138804A (en) Talkie equipment
JPS5410603A (en) Main wire catching circuit for key telephone system
JPS53135206A (en) Telephone repeating system
JPS53137608A (en) Common use system of trunks for call waiting meeting communication
JPS5442903A (en) B-board dial pulse transmission system
JPS5360507A (en) Channel holding system of service equipment
JPS5279705A (en) Privacy circuit in key telephone unit
JPS52136509A (en) Key telephone system
JPS5330802A (en) Key telephone system
JPS53130906A (en) Connection system for emergency secretary telephone