JPS5353909A - Signal unit for call tone - Google Patents

Signal unit for call tone

Info

Publication number
JPS5353909A
JPS5353909A JP12922676A JP12922676A JPS5353909A JP S5353909 A JPS5353909 A JP S5353909A JP 12922676 A JP12922676 A JP 12922676A JP 12922676 A JP12922676 A JP 12922676A JP S5353909 A JPS5353909 A JP S5353909A
Authority
JP
Japan
Prior art keywords
signal unit
call tone
unit
call
thru
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
JP12922676A
Other languages
Japanese (ja)
Inventor
Takeo Konya
Masakatsu Higake
Naoaki Ikeda
Yukio Tanaka
Koichiro Fukumoto
Michio Takahashi
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.)
Fujitsu Ltd
NEC Corp
Nippon Telegraph and Telephone Corp
Original Assignee
Fujitsu Ltd
NEC Corp
Nippon Telegraph and Telephone 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 Fujitsu Ltd, NEC Corp, Nippon Telegraph and Telephone Corp, Nippon Electric Co Ltd filed Critical Fujitsu Ltd
Priority to JP12922676A priority Critical patent/JPS5353909A/en
Publication of JPS5353909A publication Critical patent/JPS5353909A/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)

Abstract

PURPOSE:To constitute the unit with economy, by stabilizing the operation and simplifying the variable modulating degree, thru the constitution of non-contact for the call signal tone transmission circuit.
JP12922676A 1976-10-26 1976-10-26 Signal unit for call tone Pending JPS5353909A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12922676A JPS5353909A (en) 1976-10-26 1976-10-26 Signal unit for call tone

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12922676A JPS5353909A (en) 1976-10-26 1976-10-26 Signal unit for call tone

Publications (1)

Publication Number Publication Date
JPS5353909A true JPS5353909A (en) 1978-05-16

Family

ID=15004261

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12922676A Pending JPS5353909A (en) 1976-10-26 1976-10-26 Signal unit for call tone

Country Status (1)

Country Link
JP (1) JPS5353909A (en)

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