JPS5396706A - Crosstalk listening prevention circuit for telephone set - Google Patents

Crosstalk listening prevention circuit for telephone set

Info

Publication number
JPS5396706A
JPS5396706A JP1072277A JP1072277A JPS5396706A JP S5396706 A JPS5396706 A JP S5396706A JP 1072277 A JP1072277 A JP 1072277A JP 1072277 A JP1072277 A JP 1072277A JP S5396706 A JPS5396706 A JP S5396706A
Authority
JP
Japan
Prior art keywords
crosstalk
listening
telephone set
prevention circuit
signals
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
JP1072277A
Other languages
Japanese (ja)
Inventor
Kunihiro Kato
Masakazu Nishino
Harumitsu Saito
Ryoichi Okayasu
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
Original Assignee
Nippon Telegraph and Telephone Corp
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 filed Critical Nippon Telegraph and Telephone Corp
Priority to JP1072277A priority Critical patent/JPS5396706A/en
Publication of JPS5396706A publication Critical patent/JPS5396706A/en
Pending legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04MTELEPHONIC COMMUNICATION
    • H04M1/00Substation equipment, e.g. for use by subscribers
    • H04M1/60Substation equipment, e.g. for use by subscribers including speech amplifiers

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)

Abstract

PURPOSE:To make it possible to constantly keep receiving signals at a sufficient volume by adding noise signals to receiving signals to make low-level crosstalk signals impossible to hear.
JP1072277A 1977-02-04 1977-02-04 Crosstalk listening prevention circuit for telephone set Pending JPS5396706A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1072277A JPS5396706A (en) 1977-02-04 1977-02-04 Crosstalk listening prevention circuit for telephone set

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1072277A JPS5396706A (en) 1977-02-04 1977-02-04 Crosstalk listening prevention circuit for telephone set

Publications (1)

Publication Number Publication Date
JPS5396706A true JPS5396706A (en) 1978-08-24

Family

ID=11758169

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1072277A Pending JPS5396706A (en) 1977-02-04 1977-02-04 Crosstalk listening prevention circuit for telephone set

Country Status (1)

Country Link
JP (1) JPS5396706A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61193545A (en) * 1985-02-21 1986-08-28 Matsushita Electric Ind Co Ltd Key telephone set

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61193545A (en) * 1985-02-21 1986-08-28 Matsushita Electric Ind Co Ltd Key telephone set

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