JPS52116005A - Privacy talk circuit - Google Patents

Privacy talk circuit

Info

Publication number
JPS52116005A
JPS52116005A JP3247476A JP3247476A JPS52116005A JP S52116005 A JPS52116005 A JP S52116005A JP 3247476 A JP3247476 A JP 3247476A JP 3247476 A JP3247476 A JP 3247476A JP S52116005 A JPS52116005 A JP S52116005A
Authority
JP
Japan
Prior art keywords
privacy
talk circuit
talk
circuit
circuitly
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.)
Granted
Application number
JP3247476A
Other languages
English (en)
Japanese (ja)
Other versions
JPS5440406B2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html
Inventor
Masaki Ogawa
Yuichiro Takagawa
Minoru Sasai
Yoshio Nagasaki
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 Telegraph and Telephone Corp
Kanda Tsushin Kogyo Co Ltd
Original Assignee
Nippon Telegraph and Telephone Corp
Kanda Tsushin Kogyo 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 Telegraph and Telephone Corp, Kanda Tsushin Kogyo Co Ltd filed Critical Nippon Telegraph and Telephone Corp
Priority to JP3247476A priority Critical patent/JPS52116005A/ja
Publication of JPS52116005A publication Critical patent/JPS52116005A/ja
Publication of JPS5440406B2 publication Critical patent/JPS5440406B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/68—Circuit arrangements for preventing eavesdropping
    • H04M1/70—Lock-out or secrecy arrangements in party-line systems

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
JP3247476A 1976-03-26 1976-03-26 Privacy talk circuit Granted JPS52116005A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3247476A JPS52116005A (en) 1976-03-26 1976-03-26 Privacy talk circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3247476A JPS52116005A (en) 1976-03-26 1976-03-26 Privacy talk circuit

Publications (2)

Publication Number Publication Date
JPS52116005A true JPS52116005A (en) 1977-09-29
JPS5440406B2 JPS5440406B2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1979-12-03

Family

ID=12359965

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3247476A Granted JPS52116005A (en) 1976-03-26 1976-03-26 Privacy talk circuit

Country Status (1)

Country Link
JP (1) JPS52116005A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Also Published As

Publication number Publication date
JPS5440406B2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1979-12-03

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