JPS5274201A - Display control circuit for key telephone system - Google Patents

Display control circuit for key telephone system

Info

Publication number
JPS5274201A
JPS5274201A JP15112375A JP15112375A JPS5274201A JP S5274201 A JPS5274201 A JP S5274201A JP 15112375 A JP15112375 A JP 15112375A JP 15112375 A JP15112375 A JP 15112375A JP S5274201 A JPS5274201 A JP S5274201A
Authority
JP
Japan
Prior art keywords
control circuit
display control
telephone system
key telephone
lines
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
JP15112375A
Other languages
Japanese (ja)
Other versions
JPS552111B2 (en
Inventor
Osamu Enomoto
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.)
NEC Corp
Original Assignee
NEC Corp
Nippon 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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP15112375A priority Critical patent/JPS5274201A/en
Publication of JPS5274201A publication Critical patent/JPS5274201A/en
Publication of JPS552111B2 publication Critical patent/JPS552111B2/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
    • H04M9/003—Transmission of control signals from or to the key telephone set; signalling equipment at key telephone set, e.g. keyboard or display equipment

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Alarm Systems (AREA)
  • Time-Division Multiplex Systems (AREA)
  • Sub-Exchange Stations And Push- Button Telephones (AREA)
  • Audible And Visible Signals (AREA)

Abstract

PURPOSE:To enable the circuit to use lines economically, by connecting telephones to the lines to be used with key information and making necessary display.
JP15112375A 1975-12-17 1975-12-17 Display control circuit for key telephone system Granted JPS5274201A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15112375A JPS5274201A (en) 1975-12-17 1975-12-17 Display control circuit for key telephone system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15112375A JPS5274201A (en) 1975-12-17 1975-12-17 Display control circuit for key telephone system

Publications (2)

Publication Number Publication Date
JPS5274201A true JPS5274201A (en) 1977-06-22
JPS552111B2 JPS552111B2 (en) 1980-01-18

Family

ID=15511856

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15112375A Granted JPS5274201A (en) 1975-12-17 1975-12-17 Display control circuit for key telephone system

Country Status (1)

Country Link
JP (1) JPS5274201A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57110994U (en) * 1980-12-26 1982-07-09

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS49130109A (en) * 1973-04-13 1974-12-13

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS49130109A (en) * 1973-04-13 1974-12-13

Also Published As

Publication number Publication date
JPS552111B2 (en) 1980-01-18

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