JPS637704B2 - - Google Patents

Info

Publication number
JPS637704B2
JPS637704B2 JP2750281A JP2750281A JPS637704B2 JP S637704 B2 JPS637704 B2 JP S637704B2 JP 2750281 A JP2750281 A JP 2750281A JP 2750281 A JP2750281 A JP 2750281A JP S637704 B2 JPS637704 B2 JP S637704B2
Authority
JP
Japan
Prior art keywords
circuit
potential
transformer
howler sound
time
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.)
Expired
Application number
JP2750281A
Other languages
English (en)
Japanese (ja)
Other versions
JPS57141168A (en
Inventor
Toshihiro Kawaguchi
Hitoshi Myazaki
Tadafumi Sato
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
Original Assignee
Fujitsu 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 filed Critical Fujitsu Ltd
Priority to JP2750281A priority Critical patent/JPS57141168A/ja
Publication of JPS57141168A publication Critical patent/JPS57141168A/ja
Publication of JPS637704B2 publication Critical patent/JPS637704B2/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)
JP2750281A 1981-02-26 1981-02-26 Howler tone sending circuit Granted JPS57141168A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2750281A JPS57141168A (en) 1981-02-26 1981-02-26 Howler tone sending circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2750281A JPS57141168A (en) 1981-02-26 1981-02-26 Howler tone sending circuit

Publications (2)

Publication Number Publication Date
JPS57141168A JPS57141168A (en) 1982-09-01
JPS637704B2 true JPS637704B2 (en:Method) 1988-02-18

Family

ID=12222913

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2750281A Granted JPS57141168A (en) 1981-02-26 1981-02-26 Howler tone sending circuit

Country Status (1)

Country Link
JP (1) JPS57141168A (en:Method)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60239168A (ja) * 1984-05-14 1985-11-28 Nec Corp ハウラ−信号発生回路

Also Published As

Publication number Publication date
JPS57141168A (en) 1982-09-01

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