JPS6328390B2 - - Google Patents

Info

Publication number
JPS6328390B2
JPS6328390B2 JP8617081A JP8617081A JPS6328390B2 JP S6328390 B2 JPS6328390 B2 JP S6328390B2 JP 8617081 A JP8617081 A JP 8617081A JP 8617081 A JP8617081 A JP 8617081A JP S6328390 B2 JPS6328390 B2 JP S6328390B2
Authority
JP
Japan
Prior art keywords
circuit
wire
echo
branching
line
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.)
Expired
Application number
JP8617081A
Other languages
English (en)
Japanese (ja)
Other versions
JPS57201365A (en
Inventor
Senji Furuya
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.)
NEC Corp
Original Assignee
Nippon Electric 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 Electric Co Ltd filed Critical Nippon Electric Co Ltd
Priority to JP8617081A priority Critical patent/JPS57201365A/ja
Publication of JPS57201365A publication Critical patent/JPS57201365A/ja
Publication of JPS6328390B2 publication Critical patent/JPS6328390B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/42—Systems providing special services or facilities to subscribers
    • H04M3/56—Arrangements for connecting several subscribers to a common circuit, i.e. affording conference facilities
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/002—Applications of echo suppressors or cancellers in telephonic connections

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
JP8617081A 1981-06-03 1981-06-03 Four-wire system branching and coupling circuit Granted JPS57201365A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8617081A JPS57201365A (en) 1981-06-03 1981-06-03 Four-wire system branching and coupling circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8617081A JPS57201365A (en) 1981-06-03 1981-06-03 Four-wire system branching and coupling circuit

Publications (2)

Publication Number Publication Date
JPS57201365A JPS57201365A (en) 1982-12-09
JPS6328390B2 true JPS6328390B2 (enrdf_load_stackoverflow) 1988-06-08

Family

ID=13879277

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8617081A Granted JPS57201365A (en) 1981-06-03 1981-06-03 Four-wire system branching and coupling circuit

Country Status (1)

Country Link
JP (1) JPS57201365A (enrdf_load_stackoverflow)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59219058A (ja) * 1983-05-27 1984-12-10 Toshiba Corp 拡声電話機用交換機
JPS60226262A (ja) * 1984-04-25 1985-11-11 Fujitsu Ltd 会議電話呼出制御方式
JPH0834503B2 (ja) * 1986-07-10 1996-03-29 株式会社東芝 電子会議システムの音声入力装置
JPH07183835A (ja) * 1993-12-22 1995-07-21 Nec Corp 会議用エコーキャンセラー装置

Also Published As

Publication number Publication date
JPS57201365A (en) 1982-12-09

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