JPS5915548B2 - 会議通話装置 - Google Patents

会議通話装置

Info

Publication number
JPS5915548B2
JPS5915548B2 JP52124124A JP12412477A JPS5915548B2 JP S5915548 B2 JPS5915548 B2 JP S5915548B2 JP 52124124 A JP52124124 A JP 52124124A JP 12412477 A JP12412477 A JP 12412477A JP S5915548 B2 JPS5915548 B2 JP S5915548B2
Authority
JP
Japan
Prior art keywords
circuit
conference call
conference
signal
terminal
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
JP52124124A
Other languages
English (en)
Japanese (ja)
Other versions
JPS5350603A (en
Inventor
ダイエツタ−・ジヨン・ヘンリ−・クノ−ルマン
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.)
AT&T Corp
Original Assignee
Western Electric Co Inc
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 Western Electric Co Inc filed Critical Western Electric Co Inc
Publication of JPS5350603A publication Critical patent/JPS5350603A/ja
Publication of JPS5915548B2 publication Critical patent/JPS5915548B2/ja
Expired 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
    • H04M3/561—Arrangements for connecting several subscribers to a common circuit, i.e. affording conference facilities by multiplexing

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Telephonic Communication Services (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Sub-Exchange Stations And Push- Button Telephones (AREA)
  • Interconnected Communication Systems, Intercoms, And Interphones (AREA)
JP52124124A 1976-10-18 1977-10-18 会議通話装置 Expired JPS5915548B2 (ja)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US05/733,380 US4049920A (en) 1976-10-18 1976-10-18 Analog signal summing conference circuit
US000000733380 1976-10-18

Publications (2)

Publication Number Publication Date
JPS5350603A JPS5350603A (en) 1978-05-09
JPS5915548B2 true JPS5915548B2 (ja) 1984-04-10

Family

ID=24947369

Family Applications (1)

Application Number Title Priority Date Filing Date
JP52124124A Expired JPS5915548B2 (ja) 1976-10-18 1977-10-18 会議通話装置

Country Status (10)

Country Link
US (1) US4049920A ( )
JP (1) JPS5915548B2 ( )
CA (1) CA1090927A ( )
CH (1) CH624520A5 ( )
DE (1) DE2746624C2 ( )
FR (1) FR2368186A1 ( )
GB (1) GB1562937A ( )
IT (1) IT1087789B ( )
NL (1) NL7711366A ( )
SE (1) SE7711282L ( )

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL7807043A (nl) * 1977-07-19 1979-01-23 Siemens Ag Schakelinichting voor het omzetten van analoge signalen in digitale signalen en omgekeerd.
US4253000A (en) * 1979-01-18 1981-02-24 Rolm Corporation Method and system for reducing conference bridge oscillations
US4293946A (en) * 1979-11-21 1981-10-06 International Telephone And Telegraph Corporation Trilateral duplex path conferencing system with broadcast capability
US4340960A (en) * 1980-07-25 1982-07-20 Bell Telephone Laboratories, Incorporated Time division switching system
NL8006518A (nl) * 1980-12-01 1982-07-01 Philips Nv Conferentiestelsel voor telefonie.
GB2110057B (en) * 1981-10-22 1986-06-25 Bloomfield James Warman Improvements in and relating to telephone conference amplifiers, and telephone conference bridges incorporating the same
US4558180A (en) * 1983-10-25 1985-12-10 At&T Bell Laboratories Programmable audio mixer
SE449152B (sv) * 1986-03-19 1987-04-06 Paul Gosta Wilhelm Rosen Kommunikationsanleggning innefattande ett flertal enheter vilka kan uppretthalla en konferenskoppling
US5231629A (en) * 1990-10-01 1993-07-27 Motorola, Inc. Full-duplex communication system
DE4126814A1 (de) * 1991-08-09 1993-02-11 Deutsche Telephonwerk Kabel Schaltungsanordnung fuer eine konferenzeinrichtung
JPH069555U (ja) * 1992-07-14 1994-02-08 株式会社河合楽器製作所 収納ケース
US20040190701A1 (en) * 2003-03-28 2004-09-30 Versatel Networks Inc. Apparatus and method for a distributed conference bridge

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3108157A (en) * 1959-06-15 1963-10-22 Bell Telephone Labor Inc Multiple station communication circuit
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
NL7016339A ( ) * 1970-11-09 1972-05-12
JPS5544752B2 ( ) * 1973-02-01 1980-11-13
US3835259A (en) * 1973-03-22 1974-09-10 Bell Telephone Labor Inc Time division conference hybrid circuit
US3828146A (en) * 1973-03-22 1974-08-06 Bell Telephone Labor Inc Time division conference hybrid circuit
JPS5052064A ( ) * 1973-09-11 1975-05-09
US3843636A (en) * 1974-01-25 1974-10-22 Morton Norwich Products Inc 1-(5-(p-methoxyphenyl)furfurylidene)amino)hydantoin
US3857835A (en) * 1974-01-25 1974-12-31 Morton Norwich Products Inc 1-(5-(p-nitro phenyl)furfurylidene) amino)-5,6-dihydrouracil
US3882276A (en) * 1974-03-22 1975-05-06 Bell Telephone Labor Inc Conferencing system utilizing oppositely phased hybrids
US3991280A (en) * 1975-05-23 1976-11-09 Bell Telephone Laboratories, Incorporated Monobus variable resistance transmission circuit

Also Published As

Publication number Publication date
DE2746624A1 (de) 1978-04-20
CA1090927A (en) 1980-12-02
IT1087789B (it) 1985-06-04
CH624520A5 ( ) 1981-07-31
SE7711282L (sv) 1978-04-19
NL7711366A (nl) 1978-04-20
US4049920A (en) 1977-09-20
FR2368186B1 ( ) 1982-02-19
GB1562937A (en) 1980-03-19
FR2368186A1 (fr) 1978-05-12
DE2746624C2 (de) 1983-10-27
JPS5350603A (en) 1978-05-09

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