FR2138208A1 - - Google Patents

Info

Publication number
FR2138208A1
FR2138208A1 FR7118151A FR7118151A FR2138208A1 FR 2138208 A1 FR2138208 A1 FR 2138208A1 FR 7118151 A FR7118151 A FR 7118151A FR 7118151 A FR7118151 A FR 7118151A FR 2138208 A1 FR2138208 A1 FR 2138208A1
Authority
FR
France
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.)
Granted
Application number
FR7118151A
Other languages
French (fr)
Other versions
FR2138208B1 (cs
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.)
Laboratoire Central de Telecommunications SA
Original Assignee
Laboratoire Central de Telecommunications SA
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 Laboratoire Central de Telecommunications SA filed Critical Laboratoire Central de Telecommunications SA
Priority to FR717118151A priority Critical patent/FR2138208B1/fr
Priority to ZA722858A priority patent/ZA722858B/xx
Priority to GB2213072A priority patent/GB1337101A/en
Priority to CH722572A priority patent/CH586489A5/xx
Priority to DE2223861A priority patent/DE2223861C3/de
Priority to IT24366/72A priority patent/IT1001487B/it
Priority to BE783554A priority patent/BE783554R/xx
Priority to ES402899A priority patent/ES402899A1/es
Publication of FR2138208A1 publication Critical patent/FR2138208A1/fr
Application granted granted Critical
Publication of FR2138208B1 publication Critical patent/FR2138208B1/fr
Expired legal-status Critical Current

Links

Classifications

    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/20—Repeater circuits; Relay circuits
    • H04L25/22—Repeaters for converting two wires to four wires; Repeaters for converting single current to double current

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Power Engineering (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)
FR717118151A 1971-05-19 1971-05-19 Expired FR2138208B1 (cs)

Priority Applications (8)

Application Number Priority Date Filing Date Title
FR717118151A FR2138208B1 (cs) 1971-05-19 1971-05-19
ZA722858A ZA722858B (en) 1971-05-19 1972-04-28 Two-wire to four-wire conversion circuit for a data switcing centre
GB2213072A GB1337101A (cs) 1971-05-19 1972-05-11
DE2223861A DE2223861C3 (de) 1971-05-19 1972-05-16 Schaltungsanordnung für den Übergang von Zwei- auf Vierdrahtbetrieb, insbesondere für Fernmeldevermittlungsanlagen
CH722572A CH586489A5 (cs) 1971-05-19 1972-05-16
IT24366/72A IT1001487B (it) 1971-05-19 1972-05-16 Perfezionamento nei circuiti di conversione da due fili a quattro fili per un centro di commutazione di dati
BE783554A BE783554R (fr) 1971-05-19 1972-05-17 Circuit de conversion 2 fils-4 fils pour un centre de commutation de donnees
ES402899A ES402899A1 (es) 1971-05-19 1972-05-18 Mejoras en los circuitos de conversion de dos a cuatro hi- los para los centros de conmutacion de datos.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR717118151A FR2138208B1 (cs) 1971-05-19 1971-05-19

Publications (2)

Publication Number Publication Date
FR2138208A1 true FR2138208A1 (cs) 1973-01-05
FR2138208B1 FR2138208B1 (cs) 1973-05-11

Family

ID=9077306

Family Applications (1)

Application Number Title Priority Date Filing Date
FR717118151A Expired FR2138208B1 (cs) 1971-05-19 1971-05-19

Country Status (8)

Country Link
BE (1) BE783554R (cs)
CH (1) CH586489A5 (cs)
DE (1) DE2223861C3 (cs)
ES (1) ES402899A1 (cs)
FR (1) FR2138208B1 (cs)
GB (1) GB1337101A (cs)
IT (1) IT1001487B (cs)
ZA (1) ZA722858B (cs)

Also Published As

Publication number Publication date
BE783554R (fr) 1972-11-17
ES402899A1 (es) 1975-04-16
DE2223861A1 (de) 1972-12-07
ZA722858B (en) 1973-04-25
GB1337101A (cs) 1973-11-14
IT1001487B (it) 1976-04-20
DE2223861C3 (de) 1979-01-11
FR2138208B1 (cs) 1973-05-11
DE2223861B2 (de) 1978-05-03
CH586489A5 (cs) 1977-03-31

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Legal Events

Date Code Title Description
ST Notification of lapse