FR2460575A1 - Poste telephonique d'abonne a niveau d'ecoute reglable - Google Patents

Poste telephonique d'abonne a niveau d'ecoute reglable Download PDF

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Publication number
FR2460575A1
FR2460575A1 FR7916969A FR7916969A FR2460575A1 FR 2460575 A1 FR2460575 A1 FR 2460575A1 FR 7916969 A FR7916969 A FR 7916969A FR 7916969 A FR7916969 A FR 7916969A FR 2460575 A1 FR2460575 A1 FR 2460575A1
Authority
FR
France
Prior art keywords
gain control
amplifier
circuit
telephone set
control 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.)
Granted
Application number
FR7916969A
Other languages
English (en)
French (fr)
Other versions
FR2460575B1 (enExample
Inventor
Tuan-Kiet Duong
Jean Montenot
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.)
Telecommunications Radioelectriques et Telephoniques SA TRT
Original Assignee
Telecommunications Radioelectriques et Telephoniques SA TRT
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 Telecommunications Radioelectriques et Telephoniques SA TRT filed Critical Telecommunications Radioelectriques et Telephoniques SA TRT
Priority to FR7916969A priority Critical patent/FR2460575A1/fr
Publication of FR2460575A1 publication Critical patent/FR2460575A1/fr
Application granted granted Critical
Publication of FR2460575B1 publication Critical patent/FR2460575B1/fr
Granted legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/60—Substation equipment, e.g. for use by subscribers including speech amplifiers
    • H04M1/6033—Substation equipment, e.g. for use by subscribers including speech amplifiers for providing handsfree use or a loudspeaker mode in telephone sets

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Control Of Amplification And Gain Control (AREA)
FR7916969A 1979-06-29 1979-06-29 Poste telephonique d'abonne a niveau d'ecoute reglable Granted FR2460575A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7916969A FR2460575A1 (fr) 1979-06-29 1979-06-29 Poste telephonique d'abonne a niveau d'ecoute reglable

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7916969A FR2460575A1 (fr) 1979-06-29 1979-06-29 Poste telephonique d'abonne a niveau d'ecoute reglable

Publications (2)

Publication Number Publication Date
FR2460575A1 true FR2460575A1 (fr) 1981-01-23
FR2460575B1 FR2460575B1 (enExample) 1981-07-10

Family

ID=9227342

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7916969A Granted FR2460575A1 (fr) 1979-06-29 1979-06-29 Poste telephonique d'abonne a niveau d'ecoute reglable

Country Status (1)

Country Link
FR (1) FR2460575A1 (enExample)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1984000270A1 (en) * 1982-07-01 1984-01-19 Western Electric Co Apparatus for controlling the application of telephone line power in a telephone set
EP0277031A3 (en) * 1987-01-30 1990-04-25 Nec Corporation Volume control circuit for use in portable telephone or the like

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2026658A1 (enExample) * 1968-12-20 1970-09-18 Siemens Ag
CH595027A5 (en) * 1975-07-17 1978-01-31 Astrologo Ets Pushbutton telephone with display device

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2026658A1 (enExample) * 1968-12-20 1970-09-18 Siemens Ag
CH595027A5 (en) * 1975-07-17 1978-01-31 Astrologo Ets Pushbutton telephone with display device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1984000270A1 (en) * 1982-07-01 1984-01-19 Western Electric Co Apparatus for controlling the application of telephone line power in a telephone set
US4488006A (en) * 1982-07-01 1984-12-11 At&T Bell Laboratories Apparatus for controlling the application of telephone line power in a telephone set
EP0277031A3 (en) * 1987-01-30 1990-04-25 Nec Corporation Volume control circuit for use in portable telephone or the like

Also Published As

Publication number Publication date
FR2460575B1 (enExample) 1981-07-10

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Legal Events

Date Code Title Description
ST Notification of lapse