JPS5440506A - First ringing control system for time-division exchange - Google Patents

First ringing control system for time-division exchange

Info

Publication number
JPS5440506A
JPS5440506A JP10664077A JP10664077A JPS5440506A JP S5440506 A JPS5440506 A JP S5440506A JP 10664077 A JP10664077 A JP 10664077A JP 10664077 A JP10664077 A JP 10664077A JP S5440506 A JPS5440506 A JP S5440506A
Authority
JP
Japan
Prior art keywords
time
control system
ringing control
division exchange
ringing
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
JP10664077A
Other languages
Japanese (ja)
Inventor
Kaoru Tokunaga
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 JP10664077A priority Critical patent/JPS5440506A/en
Publication of JPS5440506A publication Critical patent/JPS5440506A/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)
  • Use Of Switch Circuits For Exchanges And Methods Of Control Of Multiplex Exchanges (AREA)

Abstract

PURPOSE:To ensure an economical ringing control as well as to enhance the service for the time-difision telephone exchange, by adding the first ringing function to the common signal tone trunk.
JP10664077A 1977-09-07 1977-09-07 First ringing control system for time-division exchange Pending JPS5440506A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10664077A JPS5440506A (en) 1977-09-07 1977-09-07 First ringing control system for time-division exchange

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10664077A JPS5440506A (en) 1977-09-07 1977-09-07 First ringing control system for time-division exchange

Publications (1)

Publication Number Publication Date
JPS5440506A true JPS5440506A (en) 1979-03-30

Family

ID=14438706

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10664077A Pending JPS5440506A (en) 1977-09-07 1977-09-07 First ringing control system for time-division exchange

Country Status (1)

Country Link
JP (1) JPS5440506A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5769967A (en) * 1980-10-20 1982-04-30 Sanyo Denki Kk Power supply device for telephone signal

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5769967A (en) * 1980-10-20 1982-04-30 Sanyo Denki Kk Power supply device for telephone signal
JPS6322505B2 (en) * 1980-10-20 1988-05-12 Sanyo Denki Kk

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