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

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Legal Events

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