DE2138816C3 - - Google Patents

Info

Publication number
DE2138816C3
DE2138816C3 DE19712138816 DE2138816A DE2138816C3 DE 2138816 C3 DE2138816 C3 DE 2138816C3 DE 19712138816 DE19712138816 DE 19712138816 DE 2138816 A DE2138816 A DE 2138816A DE 2138816 C3 DE2138816 C3 DE 2138816C3
Authority
DE
Germany
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
DE19712138816
Other languages
German (de)
Other versions
DE2138816B2 (en
DE2138816A1 (en
Inventor
Hermann Bendel
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 AG
Original Assignee
Siemens AG
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 Siemens AG filed Critical Siemens AG
Priority to DE19712138816 priority Critical patent/DE2138816B2/en
Priority to GB182772A priority patent/GB1358457A/en
Priority to NL7201006A priority patent/NL7201006A/xx
Priority to JP976172A priority patent/JPS5210605B1/ja
Priority to IL38648A priority patent/IL38648A/en
Priority to AU38422/72A priority patent/AU466309B2/en
Priority to FR7202648A priority patent/FR2124879A5/fr
Priority to IT19936/72A priority patent/IT947086B/en
Priority to SE7200984A priority patent/SE380956B/en
Publication of DE2138816A1 publication Critical patent/DE2138816A1/en
Publication of DE2138816B2 publication Critical patent/DE2138816B2/en
Application granted granted Critical
Publication of DE2138816C3 publication Critical patent/DE2138816C3/de
Granted 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)
DE19712138816 1971-01-29 1971-08-03 ECHO BARRIER FOR A SPEAKER CIRCUIT ON A FOUR WIRE TRANSMISSION SYSTEM Granted DE2138816B2 (en)

Priority Applications (9)

Application Number Priority Date Filing Date Title
DE19712138816 DE2138816B2 (en) 1971-08-03 1971-08-03 ECHO BARRIER FOR A SPEAKER CIRCUIT ON A FOUR WIRE TRANSMISSION SYSTEM
GB182772A GB1358457A (en) 1971-01-29 1972-01-14 Echo traps for telecommunications systems
NL7201006A NL7201006A (en) 1971-01-29 1972-01-25
IL38648A IL38648A (en) 1971-01-29 1972-01-26 Echo traps for telecommunications systems
JP976172A JPS5210605B1 (en) 1971-01-29 1972-01-26
AU38422/72A AU466309B2 (en) 1971-01-29 1972-01-27 Improvements in or relating to echo traps for telecommunications systems
FR7202648A FR2124879A5 (en) 1971-01-29 1972-01-27
IT19936/72A IT947086B (en) 1971-01-29 1972-01-28 ECO SUPPRESSOR FOR A TELEPHONE CIRCUIT ON A FOUR-WIRE TRANSMISSION SYSTEM
SE7200984A SE380956B (en) 1971-01-29 1972-01-28 ECOSPERR, CONNECTED TO A SPEECH CIRCUIT IN A FOUR-TERM TRANSFER SYSTEM

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19712138816 DE2138816B2 (en) 1971-08-03 1971-08-03 ECHO BARRIER FOR A SPEAKER CIRCUIT ON A FOUR WIRE TRANSMISSION SYSTEM

Publications (3)

Publication Number Publication Date
DE2138816A1 DE2138816A1 (en) 1973-02-15
DE2138816B2 DE2138816B2 (en) 1973-08-30
DE2138816C3 true DE2138816C3 (en) 1974-03-28

Family

ID=5815662

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19712138816 Granted DE2138816B2 (en) 1971-01-29 1971-08-03 ECHO BARRIER FOR A SPEAKER CIRCUIT ON A FOUR WIRE TRANSMISSION SYSTEM

Country Status (1)

Country Link
DE (1) DE2138816B2 (en)

Also Published As

Publication number Publication date
DE2138816B2 (en) 1973-08-30
DE2138816A1 (en) 1973-02-15

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Legal Events

Date Code Title Description
C3 Grant after two publication steps (3rd publication)
E77 Valid patent as to the heymanns-index 1977
EHJ Ceased/non-payment of the annual fee