JPS5547759A - Conference circuit - Google Patents

Conference circuit

Info

Publication number
JPS5547759A
JPS5547759A JP8994279A JP8994279A JPS5547759A JP S5547759 A JPS5547759 A JP S5547759A JP 8994279 A JP8994279 A JP 8994279A JP 8994279 A JP8994279 A JP 8994279A JP S5547759 A JPS5547759 A JP S5547759A
Authority
JP
Japan
Prior art keywords
conference circuit
conference
circuit
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.)
Pending
Application number
JP8994279A
Other languages
English (en)
Inventor
Gurando Supaabaa Richiyaado
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 JPS5547759A publication Critical patent/JPS5547759A/ja
Pending 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)
  • Interface Circuits In Exchanges (AREA)
  • Telephonic Communication Services (AREA)
  • Sub-Exchange Stations And Push- Button Telephones (AREA)
JP8994279A 1978-07-17 1979-07-17 Conference circuit Pending JPS5547759A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US05/925,190 US4197429A (en) 1978-07-17 1978-07-17 Gain-adjusting conference circuit

Publications (1)

Publication Number Publication Date
JPS5547759A true JPS5547759A (en) 1980-04-04

Family

ID=25451355

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8994279A Pending JPS5547759A (en) 1978-07-17 1979-07-17 Conference circuit

Country Status (8)

Country Link
US (1) US4197429A (ja)
JP (1) JPS5547759A (ja)
CA (1) CA1119329A (ja)
DE (1) DE2928265C2 (ja)
FR (1) FR2431804A1 (ja)
GB (1) GB2025738B (ja)
NL (1) NL7905528A (ja)
SE (1) SE443270B (ja)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IE47520B1 (en) * 1977-12-05 1984-04-04 Post Office Improvements in or relating to audio teleconferencing
US4316059A (en) * 1980-06-10 1982-02-16 Northern Telecom Limited Gain controller for a teleconferencing bridge
US4499578A (en) * 1982-05-27 1985-02-12 At&T Bell Laboratories Method and apparatus for controlling signal level in a digital conference arrangement
US4535445A (en) * 1983-06-16 1985-08-13 At&T Information Systems Conferencing system adaptive signal conditioner
ATE38604T1 (de) * 1984-02-29 1988-11-15 Hertz Inst Heinrich Nachrichtensystem fuer bildkonferenzen.
US5471527A (en) 1993-12-02 1995-11-28 Dsc Communications Corporation Voice enhancement system and method
US5712954A (en) * 1995-08-23 1998-01-27 Rockwell International Corp. System and method for monitoring audio power level of agent speech in a telephonic switch
US20060136200A1 (en) * 2004-12-22 2006-06-22 Rhemtulla Amin F Intelligent active talker level control

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3050584A (en) * 1958-12-24 1962-08-21 American Telephone & Telegraph Conference telephone apparatus
US3423538A (en) * 1964-12-28 1969-01-21 Bell Telephone Labor Inc Telephone conference circuit
US3441678A (en) * 1965-09-03 1969-04-29 Bell Telephone Labor Inc Conference circuit with selective call splitting
US3991279A (en) * 1975-05-23 1976-11-09 Bell Telephone Laboratories, Incorporated Monobus interface circuit

Also Published As

Publication number Publication date
NL7905528A (nl) 1980-01-21
SE443270B (sv) 1986-02-17
DE2928265A1 (de) 1980-01-31
US4197429A (en) 1980-04-08
GB2025738B (en) 1982-08-18
SE7905958L (sv) 1980-01-18
GB2025738A (en) 1980-01-23
CA1119329A (en) 1982-03-02
FR2431804A1 (fr) 1980-02-15
DE2928265C2 (de) 1985-07-04

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