SE456061B - Mellanfrekvensforsterkare for anvendning i tvatradsforbindelser hos ett automatiskt telefonnet och ett forfarande for forsterkningsreglering av forsterkaren - Google Patents

Mellanfrekvensforsterkare for anvendning i tvatradsforbindelser hos ett automatiskt telefonnet och ett forfarande for forsterkningsreglering av forsterkaren

Info

Publication number
SE456061B
SE456061B SE8800381A SE8800381A SE456061B SE 456061 B SE456061 B SE 456061B SE 8800381 A SE8800381 A SE 8800381A SE 8800381 A SE8800381 A SE 8800381A SE 456061 B SE456061 B SE 456061B
Authority
SE
Sweden
Prior art keywords
amplifier
gain
control
level
controller
Prior art date
Application number
SE8800381A
Other languages
English (en)
Swedish (sv)
Other versions
SE8800381L (sv
SE8800381D0 (sv
Inventor
S Vesterinen
Original Assignee
Outel Oy
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 Outel Oy filed Critical Outel Oy
Publication of SE8800381L publication Critical patent/SE8800381L/
Publication of SE8800381D0 publication Critical patent/SE8800381D0/xx
Publication of SE456061B publication Critical patent/SE456061B/sv

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/02—Details
    • H04B3/20—Reducing echo effects or singing; Opening or closing transmitting path; Conditioning for transmission in one direction or the other
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/02—Details
    • H04B3/36—Repeater circuits
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/40—Applications of speech amplifiers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/42—Systems providing special services or facilities to subscribers
    • H04M3/54—Arrangements for diverting calls for one subscriber to another predetermined subscriber
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Interface Circuits In Exchanges (AREA)
  • Amplifiers (AREA)
  • Telephonic Communication Services (AREA)
SE8800381A 1985-08-06 1988-02-05 Mellanfrekvensforsterkare for anvendning i tvatradsforbindelser hos ett automatiskt telefonnet och ett forfarande for forsterkningsreglering av forsterkaren SE456061B (sv)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FI853013A FI73341C (fi) 1985-08-06 1985-08-06 Mellanfoerstaerkare som anvaends i tvaoledningsfoerbindelser i ett valbart telefonnaet samt foerfarande foer reglering av dess foerstaerkning.

Publications (3)

Publication Number Publication Date
SE8800381L SE8800381L (sv) 1988-02-05
SE8800381D0 SE8800381D0 (sv) 1988-02-05
SE456061B true SE456061B (sv) 1988-08-29

Family

ID=8521191

Family Applications (1)

Application Number Title Priority Date Filing Date
SE8800381A SE456061B (sv) 1985-08-06 1988-02-05 Mellanfrekvensforsterkare for anvendning i tvatradsforbindelser hos ett automatiskt telefonnet och ett forfarande for forsterkningsreglering av forsterkaren

Country Status (12)

Country Link
US (1) US4831651A (de)
JP (1) JPS63500417A (de)
AT (1) ATA904586A (de)
CH (1) CH673918A5 (de)
DE (2) DE3690413T (de)
DK (1) DK166896B1 (de)
FI (1) FI73341C (de)
FR (1) FR2586149B1 (de)
GB (1) GB2199217B (de)
NL (1) NL8620307A (de)
SE (1) SE456061B (de)
WO (1) WO1987000995A1 (de)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5007046A (en) * 1988-12-28 1991-04-09 At&T Bell Laboratories Computer controlled adaptive speakerphone
US4961218A (en) * 1989-05-17 1990-10-02 Tollgrade Communications, Inc. Enhanced line powered amplifier
US4980908A (en) * 1989-05-30 1990-12-25 Voicetek Corporation Voice-switched gain control for voice communication equipment connected to telephone lines
US5195132B1 (en) * 1990-12-03 1996-03-19 At & T Bell Lab Telephone network speech signal enhancement

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3128353A (en) * 1962-03-06 1964-04-07 Bell Telephone Labor Inc Transmission control in signaling system
DE2016394C3 (de) * 1970-04-06 1973-11-15 Siemens Ag, 1000 Berlin U. 8000 Muenchen Echosperre fur einen Sprechkreis auf einem Vierdraht Übertragungssystem bei einem Übergang auf einen Zweidraht Über tragungsweg
US3689711A (en) * 1971-01-27 1972-09-05 Bell Telephone Labor Inc Call diverter repeater
CA976677A (en) * 1973-03-12 1975-10-21 Northern Electric Company Loudspeaking communication terminal apparatus and method of operation
JPS5242643B2 (de) * 1973-10-18 1977-10-26
US3903378A (en) * 1974-03-27 1975-09-02 Gte Automatic Electric Lab Inc Arrangement for controlling the gain of two-way amplifiers in accordance with loop lengths
US4007340A (en) * 1975-02-25 1977-02-08 Edison Control Corporation Distance-related variable gain amplifier
JPS5432417U (de) * 1977-08-09 1979-03-03
US4165449A (en) * 1978-01-03 1979-08-21 Storage Technology Corporation Echo suppressor circuit
FR2461412A1 (fr) * 1979-07-06 1981-01-30 Connan Jean Louis Poste telephonique a ecoute amplifiee sur haut-parleur
CA1186826A (en) * 1981-03-18 1985-05-07 Jin H. Yun Loudspeaker telephone system
KR820001673B1 (ko) * 1981-03-18 1982-09-15 금성통신 주식회사 음성 스위칭 회로
FR2518854B1 (fr) * 1981-12-18 1986-08-08 Thomson Csf Mat Tel Poste telephonique a amplificateurs de parole
CA1181541A (en) * 1982-05-21 1985-01-22 Mitel Corporation Loudspeaking telephone
US4715063A (en) * 1985-08-20 1987-12-22 Motorola, Inc. Speakerphone for radio and landline telephones

Also Published As

Publication number Publication date
US4831651A (en) 1989-05-16
DE3690413T (de) 1988-07-14
FI853013A0 (fi) 1985-08-06
GB2199217B (en) 1989-07-26
DK166896B1 (da) 1993-07-26
ATA904586A (de) 1994-10-15
DK160587D0 (da) 1987-03-30
GB8802457D0 (en) 1988-03-02
FI853013L (fi) 1987-02-07
JPS63500417A (ja) 1988-02-12
NL8620307A (nl) 1988-05-02
DK160587A (da) 1987-03-30
FR2586149A1 (fr) 1987-02-13
WO1987000995A1 (en) 1987-02-12
FI73341C (fi) 1987-09-10
DE3690413C2 (de) 1994-11-03
SE8800381L (sv) 1988-02-05
FI73341B (fi) 1987-05-29
SE8800381D0 (sv) 1988-02-05
FR2586149B1 (fr) 1993-10-01
GB2199217A (en) 1988-06-29
CH673918A5 (de) 1990-04-12

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