FR2294595A1 - Installation telephonique mains libres a commande numerique - Google Patents

Installation telephonique mains libres a commande numerique

Info

Publication number
FR2294595A1
FR2294595A1 FR7538184A FR7538184A FR2294595A1 FR 2294595 A1 FR2294595 A1 FR 2294595A1 FR 7538184 A FR7538184 A FR 7538184A FR 7538184 A FR7538184 A FR 7538184A FR 2294595 A1 FR2294595 A1 FR 2294595A1
Authority
FR
France
Prior art keywords
hands
digital control
telephone system
free telephone
free
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.)
Withdrawn
Application number
FR7538184A
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.)
Nortel Networks Ltd
Original Assignee
Northern Electric Co Ltd
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 Northern Electric Co Ltd filed Critical Northern Electric Co Ltd
Publication of FR2294595A1 publication Critical patent/FR2294595A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M9/00—Arrangements for interconnection not involving centralised switching
    • H04M9/08—Two-way loud-speaking telephone systems with means for conditioning the signal, e.g. for suppressing echoes for one or both directions of traffic
    • H04M9/085—Two-way loud-speaking telephone systems with means for conditioning the signal, e.g. for suppressing echoes for one or both directions of traffic using digital techniques

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Control Of Amplification And Gain Control (AREA)
  • Analogue/Digital Conversion (AREA)
  • Interconnected Communication Systems, Intercoms, And Interphones (AREA)
  • Transceivers (AREA)
FR7538184A 1974-12-12 1975-12-12 Installation telephonique mains libres a commande numerique Withdrawn FR2294595A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA215,876A CA996692A (en) 1974-12-12 1974-12-12 Digital control of a loudspeaking telephone system

Publications (1)

Publication Number Publication Date
FR2294595A1 true FR2294595A1 (fr) 1976-07-09

Family

ID=4101835

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7538184A Withdrawn FR2294595A1 (fr) 1974-12-12 1975-12-12 Installation telephonique mains libres a commande numerique

Country Status (9)

Country Link
JP (1) JPS5183709A (fr)
CA (1) CA996692A (fr)
DE (1) DE2555552A1 (fr)
FR (1) FR2294595A1 (fr)
GB (1) GB1519607A (fr)
IT (1) IT1050035B (fr)
NL (1) NL7514138A (fr)
NO (1) NO754207L (fr)
SE (1) SE414856B (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2375786A1 (fr) * 1976-12-27 1978-07-21 Dasy Int Sa Disposition de circuit pour eviter les accrochages
EP0120325A1 (fr) * 1983-03-01 1984-10-03 Alcatel N.V. Circuit pour poste téléphonique "mains libres"
EP0271948A2 (fr) * 1986-12-16 1988-06-22 Alcatel N.V. Circuit pour télécommunications

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2952122A1 (de) * 1979-12-22 1981-06-25 Deutsche Itt Industries Gmbh, 7800 Freiburg Schaltungsanordnung fuer sprachgesteuerte freisprechgeraete
JPS5797262A (en) * 1980-12-09 1982-06-16 Nippon Telegr & Teleph Corp <Ntt> Loud speaker telephone set system
GB2161047B (en) * 1984-06-28 1987-09-16 Stc Plc Improvements in telephone instruments
GB2174578B (en) * 1985-05-04 1988-11-09 Stc Plc Loud speaking telephone
GB2197166A (en) * 1986-11-07 1988-05-11 Storno As Controlling gain in speech-controlled telephones
DE4130045A1 (de) * 1991-09-10 1993-03-18 Standard Elektrik Lorenz Ag Schaltungsanordnung zur dynamiksteuerung eines sprachendgeraetes

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2375786A1 (fr) * 1976-12-27 1978-07-21 Dasy Int Sa Disposition de circuit pour eviter les accrochages
EP0120325A1 (fr) * 1983-03-01 1984-10-03 Alcatel N.V. Circuit pour poste téléphonique "mains libres"
EP0271948A2 (fr) * 1986-12-16 1988-06-22 Alcatel N.V. Circuit pour télécommunications
EP0271948A3 (fr) * 1986-12-16 1989-05-03 Alcatel N.V. Circuit pour télécommunications

Also Published As

Publication number Publication date
IT1050035B (it) 1981-03-10
CA996692A (en) 1976-09-07
SE414856B (sv) 1980-08-18
JPS5183709A (fr) 1976-07-22
NL7514138A (nl) 1976-06-15
NO754207L (fr) 1976-06-15
SE7514036L (sv) 1976-06-14
DE2555552A1 (de) 1976-06-16
GB1519607A (en) 1978-08-02

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Legal Events

Date Code Title Description
CD Change of name or company name
ST Notification of lapse