DE2117291C3 - Fernsprechapparat für Vierdrahtanschluß - Google Patents

Fernsprechapparat für Vierdrahtanschluß

Info

Publication number
DE2117291C3
DE2117291C3 DE19712117291 DE2117291A DE2117291C3 DE 2117291 C3 DE2117291 C3 DE 2117291C3 DE 19712117291 DE19712117291 DE 19712117291 DE 2117291 A DE2117291 A DE 2117291A DE 2117291 C3 DE2117291 C3 DE 2117291C3
Authority
DE
Germany
Prior art keywords
bridge
microphone
receiving
branches
line
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
DE19712117291
Other languages
German (de)
English (en)
Other versions
DE2117291B2 (de
DE2117291A1 (de
Inventor
Robert Brough Richmond Surrey Ford (Grossbritannien)
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.)
International Standard Electric Corp
Original Assignee
International Standard Electric Corp
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 International Standard Electric Corp filed Critical International Standard Electric Corp
Publication of DE2117291A1 publication Critical patent/DE2117291A1/de
Publication of DE2117291B2 publication Critical patent/DE2117291B2/de
Application granted granted Critical
Publication of DE2117291C3 publication Critical patent/DE2117291C3/de
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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
    • H04B1/40—Circuits
    • H04B1/54—Circuits using the same frequency for two directions of communication
    • H04B1/58—Hybrid arrangements, i.e. arrangements for transition from single-path two-direction transmission to single-direction transmission on each of two paths or vice versa
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/58—Anti-side-tone circuits
    • H04M1/585—Anti-side-tone circuits implemented without inductive element

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
DE19712117291 1970-04-10 1971-04-08 Fernsprechapparat für Vierdrahtanschluß Expired DE2117291C3 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1721170 1970-04-10

Publications (3)

Publication Number Publication Date
DE2117291A1 DE2117291A1 (de) 1971-10-28
DE2117291B2 DE2117291B2 (de) 1978-06-15
DE2117291C3 true DE2117291C3 (de) 1979-02-08

Family

ID=10091169

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19712117291 Expired DE2117291C3 (de) 1970-04-10 1971-04-08 Fernsprechapparat für Vierdrahtanschluß

Country Status (3)

Country Link
DE (1) DE2117291C3 (enrdf_load_stackoverflow)
FR (1) FR2089299A5 (enrdf_load_stackoverflow)
GB (1) GB1258677A (enrdf_load_stackoverflow)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3512327A1 (de) * 1985-04-03 1986-10-09 Deutsche Telephonwerke Und Kabelindustrie Ag, 1000 Berlin Schaltungsanordnung zur speisung eines elektronischen wahlorgans in fernsprechteilnehmerstationen

Also Published As

Publication number Publication date
FR2089299A5 (enrdf_load_stackoverflow) 1972-01-07
DE2117291B2 (de) 1978-06-15
GB1258677A (enrdf_load_stackoverflow) 1971-12-30
DE2117291A1 (de) 1971-10-28

Similar Documents

Publication Publication Date Title
DE2914945C2 (enrdf_load_stackoverflow)
DE857649C (de) Vakuumroehrenverstaerker
DE3115892A1 (de) "transformatorlose zweidraht-/vierdrahtgabelschaltung"
DE2736136C3 (de) Schaltungsanordnung zur Fehlersignalkompensation in Zweidraht-Vierdraht-Gabelschaltung
DE2413075A1 (de) Konferenz-brueckenschaltung
DE2953171A1 (en) Driving point impedance
DE1130859B (de) Einstellbarer Kurvenform-Entzerrer zur Daempfungs- und Laufzeitentzerrung von UEbertragungssystemen
DE2756846C2 (de) Entzerrer
DE2705277B2 (de) Teilnehmerschaltung für Fernmelde-, insbesondere Fernsprechanlagen
DE3437378A1 (de) Audio-empfaenger mit symmetrischem basisband
DE2332316C2 (de) Ausgangsschaltungsanordnung
DE2117291C3 (de) Fernsprechapparat für Vierdrahtanschluß
DE2449281A1 (de) Doppeltgerichteter zweidrahtverstaerker fuer fernsprechanlagen
DE2928309C2 (enrdf_load_stackoverflow)
DE2512563C3 (de) Sprechschaltung für einen Fernsprechapparat
DE1512830B2 (de) Blindwiderstandsfreie gabelschaltung zur rueckhoerdaempfung fuer fernsprechapparate
DE2117292C3 (de) Fernsprechapparat
DE3108647C2 (de) Übertragerlose Gabelschaltung für die Teilnehmerschaltung einer Fernmelde-, insbesondere Fernsprechvermittlungsanlage
DE2243060C2 (de) Brückenschaltung zur rückwirkungsfreien Verbindung mehrerer erdsymmetrischer Verbraucher oder Sender
DE1762764A1 (de) Hybrid-Rueckkopplungsverstaerker
AT148301B (de) Verstärker.
DE2523620C3 (de) Konferenzschaltung
DE3942757A1 (de) Summierverstaerker mit einem komplexen gewichtungsfaktor und schnittstelle mit einem solchen summierverstaerker
DE521289C (de) UEbertragungssystem mit durch die zu uebertragenden Stroeme gesteuerten Vorrichtungen zur Regelung der UEbertragung
DE865465C (de) Schaltungsanordnung fuer Vierdraht-Zweidraht-Verbindungen

Legal Events

Date Code Title Description
C3 Grant after two publication steps (3rd publication)
EHJ Ceased/non-payment of the annual fee