AU508617B2 - Voice switched telephone loudspeakers - Google Patents

Voice switched telephone loudspeakers

Info

Publication number
AU508617B2
AU508617B2 AU25805/77A AU2580577A AU508617B2 AU 508617 B2 AU508617 B2 AU 508617B2 AU 25805/77 A AU25805/77 A AU 25805/77A AU 2580577 A AU2580577 A AU 2580577A AU 508617 B2 AU508617 B2 AU 508617B2
Authority
AU
Australia
Prior art keywords
loudspeakers
switched telephone
voice switched
voice
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.)
Expired
Application number
AU25805/77A
Other languages
English (en)
Other versions
AU2580577A (en
Inventor
L. P. Toft au ) n Karlsson
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.)
KARLSSON LP
Original Assignee
KARLSSON LP
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 KARLSSON LP filed Critical KARLSSON LP
Publication of AU2580577A publication Critical patent/AU2580577A/en
Application granted granted Critical
Publication of AU508617B2 publication Critical patent/AU508617B2/en
Expired 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)
  • Interconnected Communication Systems, Intercoms, And Interphones (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Exchange Systems With Centralized Control (AREA)
  • Liquid Developers In Electrophotography (AREA)
AU25805/77A 1976-06-08 1977-06-03 Voice switched telephone loudspeakers Expired AU508617B2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE7606399A SE399502B (sv) 1976-06-08 1976-06-08 For telefonanleggningar med hogtalarforsedda telefonapparater avsedd styranordning
SESE7,606,39 1976-06-08

Publications (2)

Publication Number Publication Date
AU2580577A AU2580577A (en) 1978-12-07
AU508617B2 true AU508617B2 (en) 1980-03-27

Family

ID=20328149

Family Applications (1)

Application Number Title Priority Date Filing Date
AU25805/77A Expired AU508617B2 (en) 1976-06-08 1977-06-03 Voice switched telephone loudspeakers

Country Status (8)

Country Link
US (1) US4123620A (cg-RX-API-DMAC7.html)
AU (1) AU508617B2 (cg-RX-API-DMAC7.html)
DE (1) DE2726060A1 (cg-RX-API-DMAC7.html)
DK (1) DK142390B (cg-RX-API-DMAC7.html)
FR (1) FR2354668A1 (cg-RX-API-DMAC7.html)
GB (1) GB1524756A (cg-RX-API-DMAC7.html)
NO (1) NO141968B (cg-RX-API-DMAC7.html)
SE (1) SE399502B (cg-RX-API-DMAC7.html)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1149524A (en) * 1980-10-03 1983-07-05 David H.A. Black Noise signal level control in a tasi system
GB2122851B (en) * 1982-06-10 1986-03-19 Standard Telephones Cables Ltd Loudspeaking telephones
GB2174578B (en) * 1985-05-04 1988-11-09 Stc Plc Loud speaking telephone
DE4130045A1 (de) * 1991-09-10 1993-03-18 Standard Elektrik Lorenz Ag Schaltungsanordnung zur dynamiksteuerung eines sprachendgeraetes
US5384838A (en) * 1992-05-19 1995-01-24 Hoffman; Ronald J. System for communicating through partitions
US8284926B2 (en) * 2007-09-26 2012-10-09 Avaya Inc. Enterprise-distributed noise management
US10751001B2 (en) 2013-12-03 2020-08-25 General Electric Company Systems and methods for tracking and analysis of electrical-physiological interference

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3849603A (en) * 1972-10-30 1974-11-19 Mosler Safe Co Remote banking intercom system
US3832491A (en) * 1973-02-13 1974-08-27 Communications Satellite Corp Digital voice switch with an adaptive digitally-controlled threshold
US3958084A (en) * 1974-09-30 1976-05-18 Rockwell International Corporation Conferencing apparatus
US4024345A (en) * 1976-01-14 1977-05-17 Strom Industries International, Inc. Audio program and telephonic communication system

Also Published As

Publication number Publication date
DE2726060A1 (de) 1977-12-22
SE7606399L (sv) 1977-12-09
GB1524756A (en) 1978-09-13
DK254577A (cg-RX-API-DMAC7.html) 1977-12-09
FR2354668A1 (fr) 1978-01-06
NO771984L (no) 1977-12-09
SE399502B (sv) 1978-02-13
AU2580577A (en) 1978-12-07
DK142390B (da) 1980-10-20
NO141968B (no) 1980-02-25
DK142390C (cg-RX-API-DMAC7.html) 1981-03-16
US4123620A (en) 1978-10-31

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