JPS5414603A - Electronic type key telephone unit - Google Patents

Electronic type key telephone unit

Info

Publication number
JPS5414603A
JPS5414603A JP7981877A JP7981877A JPS5414603A JP S5414603 A JPS5414603 A JP S5414603A JP 7981877 A JP7981877 A JP 7981877A JP 7981877 A JP7981877 A JP 7981877A JP S5414603 A JPS5414603 A JP S5414603A
Authority
JP
Japan
Prior art keywords
electronic type
key telephone
telephone unit
type key
tone
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
JP7981877A
Other languages
Japanese (ja)
Inventor
Ryoichi Yabata
Toshio Kita
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 JP7981877A priority Critical patent/JPS5414603A/en
Publication of JPS5414603A publication Critical patent/JPS5414603A/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
    • H04M1/26—Devices for calling a subscriber
    • H04M1/53—Generation of additional signals, e.g. additional pulses

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)

Abstract

PURPOSE:To enable to develop the confirming tone at the depression of dial button, by making unnecessary the ausio tone generating circuit through the use of the pulse from a switching regulator as sound source.
JP7981877A 1977-07-06 1977-07-06 Electronic type key telephone unit Pending JPS5414603A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7981877A JPS5414603A (en) 1977-07-06 1977-07-06 Electronic type key telephone unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7981877A JPS5414603A (en) 1977-07-06 1977-07-06 Electronic type key telephone unit

Publications (1)

Publication Number Publication Date
JPS5414603A true JPS5414603A (en) 1979-02-03

Family

ID=13700776

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7981877A Pending JPS5414603A (en) 1977-07-06 1977-07-06 Electronic type key telephone unit

Country Status (1)

Country Link
JP (1) JPS5414603A (en)

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