JPS51138310A - Ringing signal sending system - Google Patents

Ringing signal sending system

Info

Publication number
JPS51138310A
JPS51138310A JP6201075A JP6201075A JPS51138310A JP S51138310 A JPS51138310 A JP S51138310A JP 6201075 A JP6201075 A JP 6201075A JP 6201075 A JP6201075 A JP 6201075A JP S51138310 A JPS51138310 A JP S51138310A
Authority
JP
Japan
Prior art keywords
signal sending
ringing signal
sending system
ringing
economical
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
JP6201075A
Other languages
English (en)
Inventor
Shige Miyoshi
Takuji Mukaemachi
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP6201075A priority Critical patent/JPS51138310A/ja
Publication of JPS51138310A publication Critical patent/JPS51138310A/ja
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)
JP6201075A 1975-05-26 1975-05-26 Ringing signal sending system Pending JPS51138310A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6201075A JPS51138310A (en) 1975-05-26 1975-05-26 Ringing signal sending system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6201075A JPS51138310A (en) 1975-05-26 1975-05-26 Ringing signal sending system

Publications (1)

Publication Number Publication Date
JPS51138310A true JPS51138310A (en) 1976-11-29

Family

ID=13187745

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6201075A Pending JPS51138310A (en) 1975-05-26 1975-05-26 Ringing signal sending system

Country Status (1)

Country Link
JP (1) JPS51138310A (ja)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3492437A (en) * 1966-10-12 1970-01-27 Bell Telephone Labor Inc Time-shared telephone ringing arrangement

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3492437A (en) * 1966-10-12 1970-01-27 Bell Telephone Labor Inc Time-shared telephone ringing arrangement

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