GB1524756A - Telephone system - Google Patents

Telephone system

Info

Publication number
GB1524756A
GB1524756A GB23793/77A GB2379377A GB1524756A GB 1524756 A GB1524756 A GB 1524756A GB 23793/77 A GB23793/77 A GB 23793/77A GB 2379377 A GB2379377 A GB 2379377A GB 1524756 A GB1524756 A GB 1524756A
Authority
GB
United Kingdom
Prior art keywords
signal
fed
comparator
counter
input
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
GB23793/77A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of GB1524756A publication Critical patent/GB1524756A/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)
  • Exchange Systems With Centralized Control (AREA)
  • Liquid Developers In Electrophotography (AREA)
  • Mobile Radio Communication Systems (AREA)
GB23793/77A 1976-06-08 1977-06-03 Telephone system Expired GB1524756A (en)

Applications Claiming Priority (1)

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

Publications (1)

Publication Number Publication Date
GB1524756A true GB1524756A (en) 1978-09-13

Family

ID=20328149

Family Applications (1)

Application Number Title Priority Date Filing Date
GB23793/77A Expired GB1524756A (en) 1976-06-08 1977-06-03 Telephone system

Country Status (8)

Country Link
US (1) US4123620A (US20020095090A1-20020718-M00002.png)
AU (1) AU508617B2 (US20020095090A1-20020718-M00002.png)
DE (1) DE2726060A1 (US20020095090A1-20020718-M00002.png)
DK (1) DK142390B (US20020095090A1-20020718-M00002.png)
FR (1) FR2354668A1 (US20020095090A1-20020718-M00002.png)
GB (1) GB1524756A (US20020095090A1-20020718-M00002.png)
NO (1) NO141968B (US20020095090A1-20020718-M00002.png)
SE (1) SE399502B (US20020095090A1-20020718-M00002.png)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2122851A (en) * 1982-06-10 1984-01-18 Standard Telephones Cables Ltd Loudspeaking telephones
GB2174578A (en) * 1985-05-04 1986-11-05 Stc Plc Loudspeaking telephone

Families Citing this family (5)

* 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
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

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2122851A (en) * 1982-06-10 1984-01-18 Standard Telephones Cables Ltd Loudspeaking telephones
GB2174578A (en) * 1985-05-04 1986-11-05 Stc Plc Loudspeaking telephone

Also Published As

Publication number Publication date
AU508617B2 (en) 1980-03-27
AU2580577A (en) 1978-12-07
DK142390B (da) 1980-10-20
US4123620A (en) 1978-10-31
SE399502B (sv) 1978-02-13
NO141968B (no) 1980-02-25
FR2354668A1 (fr) 1978-01-06
DK142390C (US20020095090A1-20020718-M00002.png) 1981-03-16
SE7606399L (sv) 1977-12-09
DE2726060A1 (de) 1977-12-22
NO771984L (no) 1977-12-09
DK254577A (US20020095090A1-20020718-M00002.png) 1977-12-09

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee