JPS57119548A - Conference telephone system - Google Patents

Conference telephone system

Info

Publication number
JPS57119548A
JPS57119548A JP56189919A JP18991981A JPS57119548A JP S57119548 A JPS57119548 A JP S57119548A JP 56189919 A JP56189919 A JP 56189919A JP 18991981 A JP18991981 A JP 18991981A JP S57119548 A JPS57119548 A JP S57119548A
Authority
JP
Japan
Prior art keywords
telephone system
conference telephone
conference
telephone
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
JP56189919A
Other languages
English (en)
Japanese (ja)
Other versions
JPH0241946B2 (forum.php
Inventor
Uiruherumusu Maria Adorianusu
Furanshisukasu Petorus Yotsubu
Yozefu Niiman Aroishiusu
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.)
Koninklijke Philips NV
Original Assignee
Philips Gloeilampenfabrieken 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 Gloeilampenfabrieken NV filed Critical Philips Gloeilampenfabrieken NV
Publication of JPS57119548A publication Critical patent/JPS57119548A/ja
Publication of JPH0241946B2 publication Critical patent/JPH0241946B2/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)
  • Data Exchanges In Wide-Area Networks (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Interconnected Communication Systems, Intercoms, And Interphones (AREA)
  • Telephonic Communication Services (AREA)
JP56189919A 1980-12-01 1981-11-28 Conference telephone system Granted JPS57119548A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL8006518A NL8006518A (nl) 1980-12-01 1980-12-01 Conferentiestelsel voor telefonie.

Publications (2)

Publication Number Publication Date
JPS57119548A true JPS57119548A (en) 1982-07-26
JPH0241946B2 JPH0241946B2 (forum.php) 1990-09-20

Family

ID=19836263

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56189919A Granted JPS57119548A (en) 1980-12-01 1981-11-28 Conference telephone system

Country Status (9)

Country Link
US (1) US4477696A (forum.php)
JP (1) JPS57119548A (forum.php)
BE (1) BE891296A (forum.php)
CA (1) CA1188779A (forum.php)
DE (1) DE3146363A1 (forum.php)
FR (1) FR2495415A1 (forum.php)
GB (1) GB2088674B (forum.php)
NL (1) NL8006518A (forum.php)
SE (1) SE451287B (forum.php)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5913072A (ja) * 1982-07-09 1984-01-23 Tokuda Seisakusho Ltd スパツタリング装置

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19524425A1 (de) * 1995-07-05 1997-01-09 Deutsche Telekom Ag Verfahren zur Raum-Echokompensation für Endgeräte mit Freisprechmöglichkeit in digitalen Netzen
CN1058003C (zh) * 1996-11-08 2000-11-01 清华大学 4-甲基咪唑的合成工艺

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50128905A (forum.php) * 1974-03-22 1975-10-11
JPS5592066A (en) * 1978-12-29 1980-07-12 Fujitsu Ltd Antisinging system in conference service

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL146543A (forum.php) *
CH408129A (de) * 1963-11-17 1966-02-28 Standard Telephon & Radio Ag Konferenzschaltung für Telephon- Teilnehmer
CH489161A (de) * 1963-11-17 1970-04-15 Standard Telephon & Radio Ag Konferenzschaltung für Telephon-Teilnehmer
US4049920A (en) * 1976-10-18 1977-09-20 Bell Telephone Laboratories, Incorporated Analog signal summing conference circuit
NL8006519A (nl) * 1980-12-01 1982-07-01 Philips Nv Conferentiestelsel voor telefonie.

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50128905A (forum.php) * 1974-03-22 1975-10-11
JPS5592066A (en) * 1978-12-29 1980-07-12 Fujitsu Ltd Antisinging system in conference service

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5913072A (ja) * 1982-07-09 1984-01-23 Tokuda Seisakusho Ltd スパツタリング装置

Also Published As

Publication number Publication date
CA1188779A (en) 1985-06-11
SE451287B (sv) 1987-09-21
NL8006518A (nl) 1982-07-01
GB2088674B (en) 1984-07-18
FR2495415A1 (fr) 1982-06-04
GB2088674A (en) 1982-06-09
US4477696A (en) 1984-10-16
JPH0241946B2 (forum.php) 1990-09-20
DE3146363A1 (de) 1982-09-16
BE891296A (fr) 1982-06-01
DE3146363C2 (forum.php) 1990-05-31
FR2495415B1 (forum.php) 1984-12-14
SE8107089L (sv) 1982-06-02

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