NL8202667A - Vierdraadsversterkte lijn en conferentieschakeling bevattende dergelijke vierdraadsversterkte lijnen. - Google Patents

Vierdraadsversterkte lijn en conferentieschakeling bevattende dergelijke vierdraadsversterkte lijnen. Download PDF

Info

Publication number
NL8202667A
NL8202667A NL8202667A NL8202667A NL8202667A NL 8202667 A NL8202667 A NL 8202667A NL 8202667 A NL8202667 A NL 8202667A NL 8202667 A NL8202667 A NL 8202667A NL 8202667 A NL8202667 A NL 8202667A
Authority
NL
Netherlands
Prior art keywords
wire
line
wire line
communication
conference
Prior art date
Application number
NL8202667A
Other languages
English (en)
Dutch (nl)
Original Assignee
Philips Nv
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 Philips Nv filed Critical Philips Nv
Priority to NL8202667A priority Critical patent/NL8202667A/nl
Priority to EP83200956A priority patent/EP0100111B1/en
Priority to DE8383200956T priority patent/DE3374751D1/de
Priority to JP58116253A priority patent/JPS5913463A/ja
Priority to US06/509,821 priority patent/US4560836A/en
Publication of NL8202667A publication Critical patent/NL8202667A/nl

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
    • H04M3/40—Applications of speech amplifiers

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Interface Circuits In Exchanges (AREA)
  • Telephonic Communication Services (AREA)
NL8202667A 1982-07-02 1982-07-02 Vierdraadsversterkte lijn en conferentieschakeling bevattende dergelijke vierdraadsversterkte lijnen. NL8202667A (nl)

Priority Applications (5)

Application Number Priority Date Filing Date Title
NL8202667A NL8202667A (nl) 1982-07-02 1982-07-02 Vierdraadsversterkte lijn en conferentieschakeling bevattende dergelijke vierdraadsversterkte lijnen.
EP83200956A EP0100111B1 (en) 1982-07-02 1983-06-28 Four-wire amplified line and conference circuit comprising such fourwire amplified lines
DE8383200956T DE3374751D1 (en) 1982-07-02 1983-06-28 Four-wire amplified line and conference circuit comprising such fourwire amplified lines
JP58116253A JPS5913463A (ja) 1982-07-02 1983-06-29 会議電話用４線式増幅回線
US06/509,821 US4560836A (en) 1982-07-02 1983-06-30 Four-wire communication line circuit and conference network comprising such circuits

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL8202667 1982-07-02
NL8202667A NL8202667A (nl) 1982-07-02 1982-07-02 Vierdraadsversterkte lijn en conferentieschakeling bevattende dergelijke vierdraadsversterkte lijnen.

Publications (1)

Publication Number Publication Date
NL8202667A true NL8202667A (nl) 1984-02-01

Family

ID=19839961

Family Applications (1)

Application Number Title Priority Date Filing Date
NL8202667A NL8202667A (nl) 1982-07-02 1982-07-02 Vierdraadsversterkte lijn en conferentieschakeling bevattende dergelijke vierdraadsversterkte lijnen.

Country Status (5)

Country Link
US (1) US4560836A (ja)
EP (1) EP0100111B1 (ja)
JP (1) JPS5913463A (ja)
DE (1) DE3374751D1 (ja)
NL (1) NL8202667A (ja)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62270450A (ja) * 1986-05-16 1987-11-24 イソライト工業株式会社 ケ−ブル延焼防止用耐火充填材
JP4754681B2 (ja) * 2000-11-14 2011-08-24 釜屋化学工業株式会社 蓋付き容器

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL302439A (ja) *
DE1094306B (de) * 1959-01-21 1960-12-08 Siemens Ag Pegelregelung bei Lautfernsprechanlagen und Funksprechendeinrichtungen mit Rueckkopplungssperre
US3135829A (en) * 1959-10-09 1964-06-02 Itt Conference call circuit
US3128353A (en) * 1962-03-06 1964-04-07 Bell Telephone Labor Inc Transmission control in signaling system
US3168619A (en) * 1962-07-13 1965-02-02 Bankers Trust Co Two-way audio communication
DE2016394C3 (de) * 1970-04-06 1973-11-15 Siemens Ag, 1000 Berlin U. 8000 Muenchen Echosperre fur einen Sprechkreis auf einem Vierdraht Übertragungssystem bei einem Übergang auf einen Zweidraht Über tragungsweg
US3745261A (en) * 1971-09-20 1973-07-10 Bell Telephone Labor Inc Telephone set speech network
JPS5242643B2 (ja) * 1973-10-18 1977-10-26
US4008376A (en) * 1975-10-17 1977-02-15 Bell Telephone Laboratories, Incorporated Loudspeaking teleconferencing circuit
GB1602473A (en) * 1978-05-31 1981-11-11 Warman B J Telephone systems providing conference facilities
JPS56157164A (en) * 1980-05-07 1981-12-04 Nec Corp Conference system
NL8006519A (nl) * 1980-12-01 1982-07-01 Philips Nv Conferentiestelsel voor telefonie.
JPS57133755A (en) * 1981-02-13 1982-08-18 Nec Corp Branch coupling circuit for conference telephone set

Also Published As

Publication number Publication date
EP0100111A1 (en) 1984-02-08
DE3374751D1 (en) 1988-01-07
US4560836A (en) 1985-12-24
JPH0336350B2 (ja) 1991-05-31
EP0100111B1 (en) 1987-11-25
JPS5913463A (ja) 1984-01-24

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Legal Events

Date Code Title Description
A1B A search report has been drawn up
A85 Still pending on 85-01-01
BV The patent application has lapsed