JPS5496305A - Display signal control system for key telephone device - Google Patents

Display signal control system for key telephone device

Info

Publication number
JPS5496305A
JPS5496305A JP311878A JP311878A JPS5496305A JP S5496305 A JPS5496305 A JP S5496305A JP 311878 A JP311878 A JP 311878A JP 311878 A JP311878 A JP 311878A JP S5496305 A JPS5496305 A JP S5496305A
Authority
JP
Japan
Prior art keywords
circuit
telephone device
key telephone
crosspoint
constitution
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
JP311878A
Other languages
Japanese (ja)
Other versions
JPS5910635B2 (en
Inventor
Yoshiichi Sano
Takao Yamamoto
Taiji Sato
Shinichi Shibata
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP311878A priority Critical patent/JPS5910635B2/en
Priority to US05/889,657 priority patent/US4184054A/en
Publication of JPS5496305A publication Critical patent/JPS5496305A/en
Publication of JPS5910635B2 publication Critical patent/JPS5910635B2/en
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

Landscapes

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

Abstract

PURPOSE:To simplify the constitution of the circuit part where the flashing control is given to the display element such as the lamp or the like by supplying the corresponding timing pulses to both the main wire and the extension circuit, and thus to simplify the overall constitution of the key telephone device of 3-paired line system. CONSTITUTION:In the key telephone device, main wire 1 and 2 are connected to talking crosspoint 5 via main wire circuit 3 and 4, and crosspoint 5 is connected to call- out crosspoint 8 via extension circuit 6 and extension call circuit 7. The state of circuit 3, 4 and 6 are givien to boss 500 in time division, and the necessary flashing period is given by lamp signal production circuit 400 and then delivered to output line 410 in the form of time division to be supplied in parallel to part 10B- 12B of each terminal circuit. Thus, the flashing is controlled for display elements 36-38 through downward control signal transmission lines 36-38. Circuit 3 performs the conventional function and also delivers the control signals to buses 501- 503 according to timing pulse 109 for calling, talking and holding each.
JP311878A 1977-03-28 1978-01-14 Display signal control method of button telephone device Expired JPS5910635B2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP311878A JPS5910635B2 (en) 1978-01-14 1978-01-14 Display signal control method of button telephone device
US05/889,657 US4184054A (en) 1977-03-28 1978-03-21 Key telephone system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP311878A JPS5910635B2 (en) 1978-01-14 1978-01-14 Display signal control method of button telephone device

Publications (2)

Publication Number Publication Date
JPS5496305A true JPS5496305A (en) 1979-07-30
JPS5910635B2 JPS5910635B2 (en) 1984-03-10

Family

ID=11548429

Family Applications (1)

Application Number Title Priority Date Filing Date
JP311878A Expired JPS5910635B2 (en) 1977-03-28 1978-01-14 Display signal control method of button telephone device

Country Status (1)

Country Link
JP (1) JPS5910635B2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60121831U (en) * 1984-01-25 1985-08-16 庄源　清治 TV stand for bed

Also Published As

Publication number Publication date
JPS5910635B2 (en) 1984-03-10

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