JPS57185757A - Branching coupling circuit for conference telephone - Google Patents

Branching coupling circuit for conference telephone

Info

Publication number
JPS57185757A
JPS57185757A JP7120281A JP7120281A JPS57185757A JP S57185757 A JPS57185757 A JP S57185757A JP 7120281 A JP7120281 A JP 7120281A JP 7120281 A JP7120281 A JP 7120281A JP S57185757 A JPS57185757 A JP S57185757A
Authority
JP
Japan
Prior art keywords
line
circuit
loss
transmission
amount
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
JP7120281A
Other languages
English (en)
Japanese (ja)
Other versions
JPS6155307B2 (enrdf_load_stackoverflow
Inventor
Hitoshi Fuda
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
NEC Corp
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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP7120281A priority Critical patent/JPS57185757A/ja
Publication of JPS57185757A publication Critical patent/JPS57185757A/ja
Publication of JPS6155307B2 publication Critical patent/JPS6155307B2/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

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Interconnected Communication Systems, Intercoms, And Interphones (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
JP7120281A 1981-05-11 1981-05-11 Branching coupling circuit for conference telephone Granted JPS57185757A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7120281A JPS57185757A (en) 1981-05-11 1981-05-11 Branching coupling circuit for conference telephone

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7120281A JPS57185757A (en) 1981-05-11 1981-05-11 Branching coupling circuit for conference telephone

Publications (2)

Publication Number Publication Date
JPS57185757A true JPS57185757A (en) 1982-11-16
JPS6155307B2 JPS6155307B2 (enrdf_load_stackoverflow) 1986-11-27

Family

ID=13453845

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7120281A Granted JPS57185757A (en) 1981-05-11 1981-05-11 Branching coupling circuit for conference telephone

Country Status (1)

Country Link
JP (1) JPS57185757A (enrdf_load_stackoverflow)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59153344A (ja) * 1983-02-21 1984-09-01 Nec Corp 光放送通信網
JPS59153367A (ja) * 1983-02-21 1984-09-01 Hitachi Ltd レベル制御会議通話方式
JPS60148263A (ja) * 1984-01-12 1985-08-05 Nippon Telegr & Teleph Corp <Ntt> 会議電話方式
JPS62154A (ja) * 1985-03-01 1987-01-06 Nec Corp 音声加算分配装置
JPH0332266A (ja) * 1989-06-29 1991-02-12 Nec Commun Syst Ltd 会議通話方式

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0418977U (enrdf_load_stackoverflow) * 1990-06-05 1992-02-18

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59153344A (ja) * 1983-02-21 1984-09-01 Nec Corp 光放送通信網
JPS59153367A (ja) * 1983-02-21 1984-09-01 Hitachi Ltd レベル制御会議通話方式
JPS60148263A (ja) * 1984-01-12 1985-08-05 Nippon Telegr & Teleph Corp <Ntt> 会議電話方式
JPS62154A (ja) * 1985-03-01 1987-01-06 Nec Corp 音声加算分配装置
JPH0332266A (ja) * 1989-06-29 1991-02-12 Nec Commun Syst Ltd 会議通話方式

Also Published As

Publication number Publication date
JPS6155307B2 (enrdf_load_stackoverflow) 1986-11-27

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