GB1258677A - - Google Patents

Info

Publication number
GB1258677A
GB1258677A GB1258677DA GB1258677A GB 1258677 A GB1258677 A GB 1258677A GB 1258677D A GB1258677D A GB 1258677DA GB 1258677 A GB1258677 A GB 1258677A
Authority
GB
United Kingdom
Prior art keywords
bridge
receiver
send
diagonals
microphone
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
Other languages
English (en)
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 filed Critical
Publication of GB1258677A publication Critical patent/GB1258677A/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
    • 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)
GB1258677D 1970-04-10 1970-04-10 Expired GB1258677A (fi)

Applications Claiming Priority (1)

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

Publications (1)

Publication Number Publication Date
GB1258677A true GB1258677A (fi) 1971-12-30

Family

ID=10091169

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1258677D Expired GB1258677A (fi) 1970-04-10 1970-04-10

Country Status (3)

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

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
DE2117291C3 (de) 1979-02-08
DE2117291A1 (de) 1971-10-28
FR2089299A5 (fi) 1972-01-07

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Legal Events

Date Code Title Description
PS Patent sealed
PE20 Patent expired after termination of 20 years