BE693524A - - Google Patents

Info

Publication number
BE693524A
BE693524A BE693524DA BE693524A BE 693524 A BE693524 A BE 693524A BE 693524D A BE693524D A BE 693524DA BE 693524 A BE693524 A BE 693524A
Authority
BE
Belgium
Application number
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 BE693524A publication Critical patent/BE693524A/xx

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)
  • Telephonic Communication Services (AREA)
BE693524D 1966-02-02 1967-02-02 BE693524A (ja)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US52457966A 1966-02-02 1966-02-02

Publications (1)

Publication Number Publication Date
BE693524A true BE693524A (ja) 1967-07-17

Family

ID=24089795

Family Applications (1)

Application Number Title Priority Date Filing Date
BE693524D BE693524A (ja) 1966-02-02 1967-02-02

Country Status (2)

Country Link
US (1) US3511931A (ja)
BE (1) BE693524A (ja)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1395495A (en) * 1971-06-30 1975-05-29 Post Office Telephone conference amplifier
US3761624A (en) * 1972-07-31 1973-09-25 Bell Telephone Labor Inc Time division signal transfer network
US3824344A (en) * 1973-03-22 1974-07-16 Bell Telephone Labor Inc Conference bridge circuit
US4278843A (en) * 1974-04-01 1981-07-14 Anaconda-Ericsson Inc. Two-way amplifier arrangement

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA602932A (en) * 1960-08-02 Northern Electric Company Telephone conference system
US2035536A (en) * 1934-06-09 1936-03-31 American Telephone & Telegraph Interconnection of transmission lines
US3060265A (en) * 1960-01-26 1962-10-23 Itt Conference call circuit
US3399275A (en) * 1964-07-13 1968-08-27 Stromberg Carlson Corp Conference circuit with suppressed sidetones

Also Published As

Publication number Publication date
US3511931A (en) 1970-05-12

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