SE365375B - - Google Patents

Info

Publication number
SE365375B
SE365375B SE16533/72A SE1653372A SE365375B SE 365375 B SE365375 B SE 365375B SE 16533/72 A SE16533/72 A SE 16533/72A SE 1653372 A SE1653372 A SE 1653372A SE 365375 B SE365375 B SE 365375B
Authority
SE
Sweden
Application number
SE16533/72A
Inventor
O Lindgren
Original Assignee
Ericsson Telefon Ab L M
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 Ericsson Telefon Ab L M filed Critical Ericsson Telefon Ab L M
Priority to SE16533/72A priority Critical patent/SE365375B/xx
Priority to US419705A priority patent/US3902023A/en
Priority to NL7316587A priority patent/NL7316587A/xx
Priority to CA188,038A priority patent/CA993582A/en
Priority to ES421458A priority patent/ES421458A1/es
Priority to FR7345115A priority patent/FR2210872B1/fr
Priority to GB5868073A priority patent/GB1440340A/en
Priority to DE19732362927 priority patent/DE2362927C3/de
Priority to JP48140412A priority patent/JPS4991104A/ja
Priority to IT32245/73A priority patent/IT1002335B/it
Publication of SE365375B publication Critical patent/SE365375B/xx

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
    • 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)
  • Control Of Amplification And Gain Control (AREA)
  • Interconnected Communication Systems, Intercoms, And Interphones (AREA)
SE16533/72A 1972-12-18 1972-12-18 SE365375B (sv)

Priority Applications (10)

Application Number Priority Date Filing Date Title
SE16533/72A SE365375B (sv) 1972-12-18 1972-12-18
US419705A US3902023A (en) 1972-12-18 1973-11-23 Loud speaking telephone set
NL7316587A NL7316587A (sv) 1972-12-18 1973-12-04
CA188,038A CA993582A (en) 1972-12-18 1973-12-12 Loud speaking telephone set
ES421458A ES421458A1 (es) 1972-12-18 1973-12-14 Aparato telefonico con altavoz.
FR7345115A FR2210872B1 (sv) 1972-12-18 1973-12-17
GB5868073A GB1440340A (en) 1972-12-18 1973-12-18 Level-control arrangements
DE19732362927 DE2362927C3 (de) 1972-12-18 1973-12-18 Lautsprecher-Telefoneinrichtung
JP48140412A JPS4991104A (sv) 1972-12-18 1973-12-18
IT32245/73A IT1002335B (it) 1972-12-18 1973-12-27 Apparecchio telefonico con rice zione amplificata

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE16533/72A SE365375B (sv) 1972-12-18 1972-12-18

Publications (1)

Publication Number Publication Date
SE365375B true SE365375B (sv) 1974-03-18

Family

ID=20302394

Family Applications (1)

Application Number Title Priority Date Filing Date
SE16533/72A SE365375B (sv) 1972-12-18 1972-12-18

Country Status (9)

Country Link
US (1) US3902023A (sv)
JP (1) JPS4991104A (sv)
CA (1) CA993582A (sv)
ES (1) ES421458A1 (sv)
FR (1) FR2210872B1 (sv)
GB (1) GB1440340A (sv)
IT (1) IT1002335B (sv)
NL (1) NL7316587A (sv)
SE (1) SE365375B (sv)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5242643B2 (sv) * 1973-10-18 1977-10-26
US4002852A (en) * 1975-07-08 1977-01-11 International Telephone And Telegraph Corporation Electronic telephone network
FR2404355A1 (fr) * 1977-09-21 1979-04-20 Phoninter Sa Dispositif permettant d'amplifier ou de transmettre les signaux recus par un telephone et faisant office d'interphone
FR2500698B1 (fr) * 1981-02-20 1989-02-17 Thomson Csf Mat Tel Dispositif anti-effet larsen pour poste telephonique
CA1186826A (en) * 1981-03-18 1985-05-07 Jin H. Yun Loudspeaker telephone system
DE3148305A1 (de) * 1981-12-03 1983-06-09 Deutsche Telephonwerke Und Kabelindustrie Ag, 1000 Berlin Schaltungsanordnung fuer eine freisprecheinrichtung
GB2174578B (en) * 1985-05-04 1988-11-09 Stc Plc Loud speaking telephone
FR2593824B1 (fr) * 1986-02-03 1988-11-04 Inst Francais Du Petrole Procede de reformage catalytique a travers au moins trois lits de catalyseur
DE3629596A1 (de) * 1986-08-30 1988-03-03 Standard Elektrik Lorenz Ag Schaltungsanordnung zur entkopplung der uebertragungszweige einer freisprecheinrichtung
US4720856A (en) * 1986-09-02 1988-01-19 Motorola, Inc. Control circuit having a direct current control loop for controlling the gain of an attenuator
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
GB2285356B (en) * 1993-12-28 1998-02-25 Nec Corp Reception volume limiting circuit

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL267461A (sv) * 1960-10-04 1900-01-01
US3395255A (en) * 1964-07-01 1968-07-30 Bell Telephone Labor Inc Loudspeaking telephone
SE311031B (sv) * 1965-12-16 1969-05-27 Ericsson Telefon Ab L M
US3562791A (en) * 1967-12-07 1971-02-09 Int Standard Electric Corp Loudspeaker telephone circuit arrangement
SE339704B (sv) * 1970-12-22 1971-10-18 Ericsson Telefon Ab L M

Also Published As

Publication number Publication date
FR2210872B1 (sv) 1977-06-10
ES421458A1 (es) 1976-04-01
IT1002335B (it) 1976-05-20
CA993582A (en) 1976-07-20
DE2362927B2 (de) 1976-02-26
DE2362927A1 (de) 1974-07-04
NL7316587A (sv) 1974-06-20
GB1440340A (en) 1976-06-23
JPS4991104A (sv) 1974-08-30
FR2210872A1 (sv) 1974-07-12
US3902023A (en) 1975-08-26

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