JPH0320945B2 - - Google Patents

Info

Publication number
JPH0320945B2
JPH0320945B2 JP58030513A JP3051383A JPH0320945B2 JP H0320945 B2 JPH0320945 B2 JP H0320945B2 JP 58030513 A JP58030513 A JP 58030513A JP 3051383 A JP3051383 A JP 3051383A JP H0320945 B2 JPH0320945 B2 JP H0320945B2
Authority
JP
Japan
Prior art keywords
circuit
level
signal
pin
output
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 - Lifetime
Application number
JP58030513A
Other languages
English (en)
Japanese (ja)
Other versions
JPS59156053A (ja
Inventor
Osamu Hamaya
Makoto Kitatsume
Masahiro Mizuma
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.)
Nippon Dentsu Co Ltd
Original Assignee
Nippon Dentsu Construction 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 Nippon Dentsu Construction Co Ltd filed Critical Nippon Dentsu Construction Co Ltd
Priority to JP3051383A priority Critical patent/JPS59156053A/ja
Publication of JPS59156053A publication Critical patent/JPS59156053A/ja
Publication of JPH0320945B2 publication Critical patent/JPH0320945B2/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
    • H04M19/04—Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone the ringing-current being generated at the substations

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
JP3051383A 1983-02-24 1983-02-24 電話機付加用の呼出信号変換装置 Granted JPS59156053A (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3051383A JPS59156053A (ja) 1983-02-24 1983-02-24 電話機付加用の呼出信号変換装置

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3051383A JPS59156053A (ja) 1983-02-24 1983-02-24 電話機付加用の呼出信号変換装置

Publications (2)

Publication Number Publication Date
JPS59156053A JPS59156053A (ja) 1984-09-05
JPH0320945B2 true JPH0320945B2 (enExample) 1991-03-20

Family

ID=12305887

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3051383A Granted JPS59156053A (ja) 1983-02-24 1983-02-24 電話機付加用の呼出信号変換装置

Country Status (1)

Country Link
JP (1) JPS59156053A (enExample)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5081711A (enExample) * 1973-11-24 1975-07-02
JPS5490906A (en) * 1977-12-27 1979-07-19 Seiko Epson Corp Telephone set
JPS57112196A (en) * 1980-12-29 1982-07-13 Fujitsu Ltd Ringing detection circuit
US4415776A (en) * 1981-04-17 1983-11-15 Tang Robin K L Telephone music-on-hold device

Also Published As

Publication number Publication date
JPS59156053A (ja) 1984-09-05

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