JPS5218111A - Signal sound supply supervisory circuit - Google Patents

Signal sound supply supervisory circuit

Info

Publication number
JPS5218111A
JPS5218111A JP9307775A JP9307775A JPS5218111A JP S5218111 A JPS5218111 A JP S5218111A JP 9307775 A JP9307775 A JP 9307775A JP 9307775 A JP9307775 A JP 9307775A JP S5218111 A JPS5218111 A JP S5218111A
Authority
JP
Japan
Prior art keywords
signal sound
supervisory circuit
supply supervisory
sound supply
circuit
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
JP9307775A
Other languages
Japanese (ja)
Inventor
Eiichi Suezaki
Sadayuki Hiraki
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 JP9307775A priority Critical patent/JPS5218111A/en
Publication of JPS5218111A publication Critical patent/JPS5218111A/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)
  • Monitoring And Testing Of Exchanges (AREA)
  • Devices For Supply Of Signal Current (AREA)

Abstract

PURPOSE:In order to reduce the actual mounting space through detecting the earth trouble by using a retardation coil, when the earth trouble is generated on the line between the signal power source and the signal sound supply supervisory circuit or within the circuit.
JP9307775A 1975-08-01 1975-08-01 Signal sound supply supervisory circuit Pending JPS5218111A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9307775A JPS5218111A (en) 1975-08-01 1975-08-01 Signal sound supply supervisory circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9307775A JPS5218111A (en) 1975-08-01 1975-08-01 Signal sound supply supervisory circuit

Publications (1)

Publication Number Publication Date
JPS5218111A true JPS5218111A (en) 1977-02-10

Family

ID=14072440

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9307775A Pending JPS5218111A (en) 1975-08-01 1975-08-01 Signal sound supply supervisory circuit

Country Status (1)

Country Link
JP (1) JPS5218111A (en)

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