JPS5649029B2 - - Google Patents

Info

Publication number
JPS5649029B2
JPS5649029B2 JP3251975A JP3251975A JPS5649029B2 JP S5649029 B2 JPS5649029 B2 JP S5649029B2 JP 3251975 A JP3251975 A JP 3251975A JP 3251975 A JP3251975 A JP 3251975A JP S5649029 B2 JPS5649029 B2 JP S5649029B2
Authority
JP
Japan
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
JP3251975A
Other versions
JPS50128905A (ja
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 filed Critical
Publication of JPS50128905A publication Critical patent/JPS50128905A/ja
Publication of JPS5649029B2 publication Critical patent/JPS5649029B2/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)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Interconnected Communication Systems, Intercoms, And Interphones (AREA)
  • Interface Circuits In Exchanges (AREA)
JP3251975A 1974-03-22 1975-03-19 Expired JPS5649029B2 (ja)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US453705A US3882276A (en) 1974-03-22 1974-03-22 Conferencing system utilizing oppositely phased hybrids

Publications (2)

Publication Number Publication Date
JPS50128905A JPS50128905A (ja) 1975-10-11
JPS5649029B2 true JPS5649029B2 (ja) 1981-11-19

Family

ID=23801718

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3251975A Expired JPS5649029B2 (ja) 1974-03-22 1975-03-19

Country Status (12)

Country Link
US (1) US3882276A (ja)
JP (1) JPS5649029B2 (ja)
BE (1) BE826833A (ja)
CA (1) CA997876A (ja)
CH (1) CH583996A5 (ja)
DE (1) DE2511776C2 (ja)
ES (1) ES435539A1 (ja)
FR (1) FR2265234B1 (ja)
GB (1) GB1501231A (ja)
IT (1) IT1034402B (ja)
NL (1) NL179778C (ja)
SE (1) SE7502732L (ja)

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2607480C2 (de) * 1976-02-20 1982-11-25 Deutsche Telephonwerke Und Kabelindustrie Ag, 1000 Berlin Schaltungsanordnung für eine Gabel
US4045615A (en) * 1976-05-21 1977-08-30 Bell Telephone Laboratories, Incorporated Monobus interface circuit using opto-coupled hybrids
US4049920A (en) * 1976-10-18 1977-09-20 Bell Telephone Laboratories, Incorporated Analog signal summing conference circuit
FR2390864A1 (fr) * 1977-05-09 1978-12-08 France Etat Systeme d'audioconference par liaison telephonique
JPS5940341B2 (ja) * 1977-06-29 1984-09-29 株式会社東芝 時分割交換会議システム
US4153817A (en) * 1977-11-25 1979-05-08 Stromberg-Carlson Corporation Digital conference circuit
JPS5919506B2 (ja) * 1978-04-14 1984-05-07 株式会社東芝 電話交換機
JPS54139411A (en) * 1978-04-21 1979-10-29 Nec Corp Conference trunk circuit
DE2833712C3 (de) * 1978-07-28 1982-04-08 Siemens AG, 1000 Berlin und 8000 München Nachrichtenübertragungseinrichtung mit mehreren aus separaten Sende- und Empfangsleitungen gebildeten Übertragungswegen
JPS5829032B2 (ja) * 1978-12-29 1983-06-20 富士通株式会社 会議通話における鳴音防止方式
US4253000A (en) * 1979-01-18 1981-02-24 Rolm Corporation Method and system for reducing conference bridge oscillations
FR2450541A1 (fr) * 1979-03-02 1980-09-26 Jeumont Schneider Reseau de connexion pour conference telephonique en mia
DE3013208C2 (de) * 1980-04-03 1983-01-05 Siemens AG, 1000 Berlin und 8000 München Schaltungsanordnung für eine Fernsprechanlage, insbesondere Fernsprechnebenstellenanlage, mit Fernsprechkonferenzmöglichkeit über ein Konferenznetzwerk
NL8006518A (nl) * 1980-12-01 1982-07-01 Philips Nv Conferentiestelsel voor telefonie.
NL8006519A (nl) * 1980-12-01 1982-07-01 Philips Nv Conferentiestelsel voor telefonie.
JPH0783409B2 (ja) * 1986-01-22 1995-09-06 岩崎通信機株式会社 割込通話方式
US5282157A (en) * 1990-09-13 1994-01-25 Telecom Analysis Systems, Inc. Input impedance derived from a transfer network
US20080259824A1 (en) 2007-04-23 2008-10-23 Frankel David P Identity-based conferencing systems and methods

Family Cites Families (7)

* 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
DE1931985C3 (de) * 1969-06-24 1975-05-22 Siemens Ag, 1000 Berlin Und 8000 Muenchen Fernsprechkonferenzanlage
US3761624A (en) * 1972-07-31 1973-09-25 Bell Telephone Labor Inc Time division signal transfer network
US3828146A (en) * 1973-03-22 1974-08-06 Bell Telephone Labor Inc Time division conference hybrid circuit
US3824344A (en) * 1973-03-22 1974-07-16 Bell Telephone Labor Inc Conference bridge circuit

Also Published As

Publication number Publication date
NL179778C (nl) 1986-11-03
FR2265234B1 (ja) 1979-05-25
BE826833A (fr) 1975-07-16
US3882276A (en) 1975-05-06
ES435539A1 (es) 1976-12-16
AU7921675A (en) 1976-09-23
NL7503141A (nl) 1975-09-24
JPS50128905A (ja) 1975-10-11
CH583996A5 (ja) 1977-01-14
DE2511776A1 (de) 1975-09-25
SE7502732L (ja) 1975-09-23
CA997876A (en) 1976-09-28
FR2265234A1 (ja) 1975-10-17
DE2511776C2 (de) 1985-06-27
GB1501231A (en) 1978-02-15
IT1034402B (it) 1979-09-10
NL179778B (nl) 1986-06-02

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