IT1161440B - Circuito per un telefono a dialogo libero - Google Patents

Circuito per un telefono a dialogo libero

Info

Publication number
IT1161440B
IT1161440B IT12485/78A IT1248578A IT1161440B IT 1161440 B IT1161440 B IT 1161440B IT 12485/78 A IT12485/78 A IT 12485/78A IT 1248578 A IT1248578 A IT 1248578A IT 1161440 B IT1161440 B IT 1161440B
Authority
IT
Italy
Prior art keywords
phone
circuit
dialog
free
free dialog
Prior art date
Application number
IT12485/78A
Other languages
English (en)
Italian (it)
Other versions
IT7812485A0 (it
Original Assignee
Dasy Int Sa
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
Priority claimed from DE19772751248 external-priority patent/DE2751248C3/de
Priority claimed from DE19772751261 external-priority patent/DE2751261C3/de
Application filed by Dasy Int Sa filed Critical Dasy Int Sa
Publication of IT7812485A0 publication Critical patent/IT7812485A0/it
Application granted granted Critical
Publication of IT1161440B publication Critical patent/IT1161440B/it

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
    • H04M9/10—Two-way loud-speaking telephone systems with means for conditioning the signal, e.g. for suppressing echoes for one or both directions of traffic with switching of direction of transmission by voice frequency

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Interconnected Communication Systems, Intercoms, And Interphones (AREA)
IT12485/78A 1977-11-16 1978-02-20 Circuito per un telefono a dialogo libero IT1161440B (it)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19772751248 DE2751248C3 (de) 1977-11-16 1977-11-16 Schaltungsanordnung für ein Freisprechertelefon
DE19772751261 DE2751261C3 (de) 1977-11-16 1977-11-16 Schaltungsanordnung für ein Freisprechertelefon mit selbsttätiger Signalamplitudenbegrenzung

Publications (2)

Publication Number Publication Date
IT7812485A0 IT7812485A0 (it) 1978-02-20
IT1161440B true IT1161440B (it) 1987-03-18

Family

ID=25773095

Family Applications (1)

Application Number Title Priority Date Filing Date
IT12485/78A IT1161440B (it) 1977-11-16 1978-02-20 Circuito per un telefono a dialogo libero

Country Status (10)

Country Link
JP (1) JPS5472906A (de)
CH (1) CH626485A5 (de)
DK (1) DK74878A (de)
FI (1) FI780555A (de)
FR (1) FR2409645A2 (de)
GB (1) GB1568329A (de)
IT (1) IT1161440B (de)
LU (1) LU79026A1 (de)
NL (1) NL7801820A (de)
SE (1) SE7801902L (de)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB8317706D0 (en) * 1983-06-29 1983-08-03 Standard Telephones Cables Ltd Telephone subsets
US4724540A (en) * 1986-09-02 1988-02-09 Motorola, Inc. Speakerphone with fast idle mode
JPH06338934A (ja) * 1993-05-25 1994-12-06 Exar Corp 事象駆動型制御回路を有するスピーカーホーン

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4051325A (en) * 1975-01-31 1977-09-27 Matsushita Electric Industrial Co., Ltd. Speech intercommunication system
DE2638286C3 (de) * 1976-08-25 1979-03-01 Dasy Inter S.A., Genf (Schweiz) Schaltungsanordnung für ein Freisprechertelefon

Also Published As

Publication number Publication date
IT7812485A0 (it) 1978-02-20
DK74878A (da) 1979-05-17
CH626485A5 (en) 1981-11-13
SE7801902L (sv) 1979-05-17
LU79026A1 (de) 1978-06-21
GB1568329A (en) 1980-05-29
JPS5472906A (en) 1979-06-11
NL7801820A (nl) 1979-05-18
FI780555A (fi) 1979-05-17
FR2409645A2 (fr) 1979-06-15

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