JPS55109070A - Howler signal sending system - Google Patents

Howler signal sending system

Info

Publication number
JPS55109070A
JPS55109070A JP1666979A JP1666979A JPS55109070A JP S55109070 A JPS55109070 A JP S55109070A JP 1666979 A JP1666979 A JP 1666979A JP 1666979 A JP1666979 A JP 1666979A JP S55109070 A JPS55109070 A JP S55109070A
Authority
JP
Japan
Prior art keywords
voltage
output
howler
period
signal
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
JP1666979A
Other languages
English (en)
Japanese (ja)
Other versions
JPH0542189B2 (de
Inventor
Kunio Nagashima
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 JP1666979A priority Critical patent/JPS55109070A/ja
Publication of JPS55109070A publication Critical patent/JPS55109070A/ja
Publication of JPH0542189B2 publication Critical patent/JPH0542189B2/ja
Granted 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)
JP1666979A 1979-02-14 1979-02-14 Howler signal sending system Granted JPS55109070A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1666979A JPS55109070A (en) 1979-02-14 1979-02-14 Howler signal sending system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1666979A JPS55109070A (en) 1979-02-14 1979-02-14 Howler signal sending system

Publications (2)

Publication Number Publication Date
JPS55109070A true JPS55109070A (en) 1980-08-21
JPH0542189B2 JPH0542189B2 (de) 1993-06-25

Family

ID=11922718

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1666979A Granted JPS55109070A (en) 1979-02-14 1979-02-14 Howler signal sending system

Country Status (1)

Country Link
JP (1) JPS55109070A (de)

Also Published As

Publication number Publication date
JPH0542189B2 (de) 1993-06-25

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