JPS5472906A - Loudspeaking telephone circuit - Google Patents

Loudspeaking telephone circuit

Info

Publication number
JPS5472906A
JPS5472906A JP1840878A JP1840878A JPS5472906A JP S5472906 A JPS5472906 A JP S5472906A JP 1840878 A JP1840878 A JP 1840878A JP 1840878 A JP1840878 A JP 1840878A JP S5472906 A JPS5472906 A JP S5472906A
Authority
JP
Japan
Prior art keywords
telephone circuit
loudspeaking telephone
loudspeaking
circuit
telephone
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
JP1840878A
Other languages
English (en)
Japanese (ja)
Inventor
Burosou Yorugen
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.)
Dasy Inter SA
Original Assignee
Dasy Inter 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 Inter SA filed Critical Dasy Inter SA
Publication of JPS5472906A publication Critical patent/JPS5472906A/ja
Pending 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
    • H04M9/10—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)
JP1840878A 1977-11-16 1978-02-20 Loudspeaking telephone circuit Pending JPS5472906A (en)

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 (1)

Publication Number Publication Date
JPS5472906A true JPS5472906A (en) 1979-06-11

Family

ID=25773095

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1840878A Pending JPS5472906A (en) 1977-11-16 1978-02-20 Loudspeaking telephone circuit

Country Status (10)

Country Link
JP (1) JPS5472906A (da)
CH (1) CH626485A5 (da)
DK (1) DK74878A (da)
FI (1) FI780555A7 (da)
FR (1) FR2409645A2 (da)
GB (1) GB1568329A (da)
IT (1) IT1161440B (da)
LU (1) LU79026A1 (da)
NL (1) NL7801820A (da)
SE (1) SE7801902L (da)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6037860A (ja) * 1983-06-29 1985-02-27 エステイーシー・ピーエルシー 電話機の改良

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6037860A (ja) * 1983-06-29 1985-02-27 エステイーシー・ピーエルシー 電話機の改良

Also Published As

Publication number Publication date
CH626485A5 (en) 1981-11-13
FI780555A7 (fi) 1979-05-17
SE7801902L (sv) 1979-05-17
DK74878A (da) 1979-05-17
IT1161440B (it) 1987-03-18
IT7812485A0 (it) 1978-02-20
FR2409645A2 (fr) 1979-06-15
LU79026A1 (de) 1978-06-21
GB1568329A (en) 1980-05-29
NL7801820A (nl) 1979-05-18

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