FR2331910A1 - Amplificateur de conference telephonique - Google Patents

Amplificateur de conference telephonique

Info

Publication number
FR2331910A1
FR2331910A1 FR7634568A FR7634568A FR2331910A1 FR 2331910 A1 FR2331910 A1 FR 2331910A1 FR 7634568 A FR7634568 A FR 7634568A FR 7634568 A FR7634568 A FR 7634568A FR 2331910 A1 FR2331910 A1 FR 2331910A1
Authority
FR
France
Prior art keywords
telephone conference
conference amplifier
amplifier
telephone
conference
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
FR7634568A
Other languages
English (en)
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.)
Post Office
Original Assignee
Post Office
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 Post Office filed Critical Post Office
Publication of FR2331910A1 publication Critical patent/FR2331910A1/fr
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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/40—Applications of speech amplifiers

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Amplifiers (AREA)
FR7634568A 1975-11-17 1976-11-17 Amplificateur de conference telephonique Pending FR2331910A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB47251/75A GB1559839A (en) 1975-11-17 1975-11-17 Tlephone conference amplifier

Publications (1)

Publication Number Publication Date
FR2331910A1 true FR2331910A1 (fr) 1977-06-10

Family

ID=10444310

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7634568A Pending FR2331910A1 (fr) 1975-11-17 1976-11-17 Amplificateur de conference telephonique

Country Status (7)

Country Link
US (1) US4085290A (fr)
BE (1) BE848439A (fr)
CA (1) CA1061489A (fr)
FR (1) FR2331910A1 (fr)
GB (1) GB1559839A (fr)
NL (1) NL7612727A (fr)
SE (1) SE423297B (fr)

Citations (1)

* 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

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3321581A (en) * 1963-07-05 1967-05-23 Itt Voice operated gain adjusting device
US3371231A (en) * 1964-10-22 1968-02-27 Johnson Service Co Electronic control affording modulating control of a load current in accordance with a sensed condition
US3299296A (en) * 1964-11-12 1967-01-17 Collins Radio Co Low level threshold detector with temperature compensation
JPS5320343B2 (fr) * 1973-03-29 1978-06-26

Patent Citations (1)

* 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

Also Published As

Publication number Publication date
BE848439A (fr) 1977-03-16
SE423297B (sv) 1982-04-26
CA1061489A (fr) 1979-08-28
NL7612727A (nl) 1977-05-20
US4085290A (en) 1978-04-18
SE7612611L (sv) 1977-05-18
GB1559839A (en) 1980-01-30

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