JPS53138609A - Key telephone set - Google Patents

Key telephone set

Info

Publication number
JPS53138609A
JPS53138609A JP5402077A JP5402077A JPS53138609A JP S53138609 A JPS53138609 A JP S53138609A JP 5402077 A JP5402077 A JP 5402077A JP 5402077 A JP5402077 A JP 5402077A JP S53138609 A JPS53138609 A JP S53138609A
Authority
JP
Japan
Prior art keywords
telephone set
key telephone
assured
flashing
discrimination
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
JP5402077A
Other languages
Japanese (ja)
Inventor
Teruo Nakamura
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 JP5402077A priority Critical patent/JPS53138609A/en
Publication of JPS53138609A publication Critical patent/JPS53138609A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/02—Constructional features of telephone sets
    • H04M1/22—Illumination; Arrangements for improving the visibility of characters on dials

Landscapes

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

Abstract

PURPOSE:To have an assured discrimination of the flashing by controlling the current supplied to LED, etc. according to the peripheral brightness of the display element.
JP5402077A 1977-05-10 1977-05-10 Key telephone set Pending JPS53138609A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5402077A JPS53138609A (en) 1977-05-10 1977-05-10 Key telephone set

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5402077A JPS53138609A (en) 1977-05-10 1977-05-10 Key telephone set

Publications (1)

Publication Number Publication Date
JPS53138609A true JPS53138609A (en) 1978-12-04

Family

ID=12958894

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5402077A Pending JPS53138609A (en) 1977-05-10 1977-05-10 Key telephone set

Country Status (1)

Country Link
JP (1) JPS53138609A (en)

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