GB1358457A - Echo traps for telecommunications systems - Google Patents

Echo traps for telecommunications systems

Info

Publication number
GB1358457A
GB1358457A GB182772A GB182772A GB1358457A GB 1358457 A GB1358457 A GB 1358457A GB 182772 A GB182772 A GB 182772A GB 182772 A GB182772 A GB 182772A GB 1358457 A GB1358457 A GB 1358457A
Authority
GB
United Kingdom
Prior art keywords
speech
echo
level
comparator
hybrid
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
GB182772A
Other languages
English (en)
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.)
Siemens Corp
Original Assignee
Siemens 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
Priority claimed from DE2104280A external-priority patent/DE2104280C3/de
Priority claimed from DE19712138817 external-priority patent/DE2138817C/de
Priority claimed from DE19712138816 external-priority patent/DE2138816B2/de
Application filed by Siemens Corp filed Critical Siemens Corp
Publication of GB1358457A publication Critical patent/GB1358457A/en
Expired legal-status Critical Current

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

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Interface Circuits In Exchanges (AREA)
GB182772A 1971-01-29 1972-01-14 Echo traps for telecommunications systems Expired GB1358457A (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE2104280A DE2104280C3 (de) 1971-01-29 1971-01-29 Echosperre für einen Sprechkreis auf einem Vierdraht-Übertragungssystem
DE19712138817 DE2138817C (de) 1971-08-03 Echosperre fur einen Sprechkreis auf einem Vierdraht Übertragungssystem
DE19712138816 DE2138816B2 (de) 1971-08-03 1971-08-03 Echosperre fuer einen sprechkreis auf einem vierdraht-uebertragungssystem
DE19712138818 DE2138818C (de) 1971-08-03 Echosperre fur einen Sprechkreis auf einem Vierdraht Übertragungssystem

Publications (1)

Publication Number Publication Date
GB1358457A true GB1358457A (en) 1974-07-03

Family

ID=27431199

Family Applications (1)

Application Number Title Priority Date Filing Date
GB182772A Expired GB1358457A (en) 1971-01-29 1972-01-14 Echo traps for telecommunications systems

Country Status (6)

Country Link
FR (1) FR2124879A5 (enExample)
GB (1) GB1358457A (enExample)
IL (1) IL38648A (enExample)
IT (1) IT947086B (enExample)
NL (1) NL7201006A (enExample)
SE (1) SE380956B (enExample)

Also Published As

Publication number Publication date
NL7201006A (enExample) 1972-08-01
SE380956B (sv) 1975-11-17
IL38648A0 (en) 1972-04-27
IL38648A (en) 1975-12-31
FR2124879A5 (enExample) 1972-09-22
IT947086B (it) 1973-05-21

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee