JPS5478908A - Telephone set - Google Patents

Telephone set

Info

Publication number
JPS5478908A
JPS5478908A JP14646577A JP14646577A JPS5478908A JP S5478908 A JPS5478908 A JP S5478908A JP 14646577 A JP14646577 A JP 14646577A JP 14646577 A JP14646577 A JP 14646577A JP S5478908 A JPS5478908 A JP S5478908A
Authority
JP
Japan
Prior art keywords
absence
telephone set
display
illuminated
operator
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
JP14646577A
Other languages
Japanese (ja)
Inventor
Tatsuya Kato
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 JP14646577A priority Critical patent/JPS5478908A/en
Publication of JPS5478908A publication Critical patent/JPS5478908A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M19/00—Current supply arrangements for telephone systems
    • H04M19/02—Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Devices For Supply Of Signal Current (AREA)
  • Sub-Exchange Stations And Push- Button Telephones (AREA)

Abstract

PURPOSE:To prevent useless call out by displaying absence and busy condition, through the display of the absence of the operator for the telephone set with the busy condition display unit, in a key answering telephone set. CONSTITUTION:When the telephone #1 is in off-hook, LED-L1 of the display unit D is illuminated with the operation of the hook switch HS, performing the busy display. Further, in the telephone set #n for which the operator is absent, the operation of the absence hold relay B is held with the absence switch BS closed and the LED-Ln of the unit D is illuminated, performing the absence display.
JP14646577A 1977-12-06 1977-12-06 Telephone set Pending JPS5478908A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14646577A JPS5478908A (en) 1977-12-06 1977-12-06 Telephone set

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14646577A JPS5478908A (en) 1977-12-06 1977-12-06 Telephone set

Publications (1)

Publication Number Publication Date
JPS5478908A true JPS5478908A (en) 1979-06-23

Family

ID=15408242

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14646577A Pending JPS5478908A (en) 1977-12-06 1977-12-06 Telephone set

Country Status (1)

Country Link
JP (1) JPS5478908A (en)

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