CA951381A - Closed data loop test method and apparatus for data transmission modem - Google Patents

Closed data loop test method and apparatus for data transmission modem

Info

Publication number
CA951381A
CA951381A CA143,560,A CA143560A CA951381A CA 951381 A CA951381 A CA 951381A CA 143560 A CA143560 A CA 143560A CA 951381 A CA951381 A CA 951381A
Authority
CA
Canada
Prior art keywords
test method
loop test
data transmission
transmission modem
data
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
CA143,560,A
Other languages
English (en)
Other versions
CA143560S (en
Inventor
Steven J. Davis
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.)
General Datacomm Inc
Original Assignee
General Datacomm Inc
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 General Datacomm Inc filed Critical General Datacomm Inc
Application granted granted Critical
Publication of CA951381A publication Critical patent/CA951381A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/24—Testing correct operation
    • H04L1/242—Testing correct operation by comparing a transmitted test signal with a locally generated replica
    • H04L1/243—Testing correct operation by comparing a transmitted test signal with a locally generated replica at the transmitter, using a loop-back

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Maintenance And Management Of Digital Transmission (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
  • Dc Digital Transmission (AREA)
  • Monitoring And Testing Of Transmission In General (AREA)
  • Detection And Prevention Of Errors In Transmission (AREA)
  • Bidirectional Digital Transmission (AREA)
  • Communication Control (AREA)
CA143,560,A 1971-08-10 1972-05-31 Closed data loop test method and apparatus for data transmission modem Expired CA951381A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US17042871A 1971-08-10 1971-08-10

Publications (1)

Publication Number Publication Date
CA951381A true CA951381A (en) 1974-07-16

Family

ID=22619815

Family Applications (1)

Application Number Title Priority Date Filing Date
CA143,560,A Expired CA951381A (en) 1971-08-10 1972-05-31 Closed data loop test method and apparatus for data transmission modem

Country Status (8)

Country Link
US (1) US3743938A (en:Method)
JP (1) JPS5528449B2 (en:Method)
BE (1) BE787359A (en:Method)
CA (1) CA951381A (en:Method)
DE (1) DE2231869C3 (en:Method)
FR (1) FR2150020A5 (en:Method)
GB (1) GB1399659A (en:Method)
IT (1) IT959320B (en:Method)

Families Citing this family (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3952163A (en) * 1972-04-24 1976-04-20 General Datacomm Industries, Inc. Method and apparatus for testing in FDM system
US4039751A (en) * 1972-04-24 1977-08-02 General Datacomm Industries, Inc. Method and apparatus for closed loop testing of first and second modulators and demodulators
DE2240218B2 (de) * 1972-08-16 1977-05-18 TEKA DE Feiten & Guilleaume Fernmeldeanlagen GmbH, 500 Nürnberg Ueberwachungseinrichtung fuer ein pulscodemodulationssystem
DE2422504B2 (de) * 1974-05-09 1977-09-29 TE KA DE Feiten & Guilleaume Fernmeldeanlagen GmbH, 8500 Nürnberg Nachrichtenuebertragungssystem
US4004097A (en) * 1975-01-03 1977-01-18 Badger Meter, Inc. Automatic meter reading device
DE2530633C3 (de) * 1975-07-09 1979-04-05 Siemens Ag, 1000 Berlin Und 8000 Muenchen Verfahren zur automatischen Überprüfung der Funktionstüchtigkeit von Datenübertragungssystemen
US4055808A (en) * 1976-05-20 1977-10-25 Intertel, Inc. Data communications network testing system
JPS5320707A (en) * 1976-08-10 1978-02-25 Nippon Telegr & Teleph Corp <Ntt> Automatic return system for subscriber line base band transmission system
FR2365922A1 (fr) * 1976-09-24 1978-04-21 Materiel Telephonique Unite de signalisation pour central telephonique
LU79451A1 (de) * 1978-04-17 1978-09-28 Cea Elektronik Automat Gmbh Vorrichtung zum erkennen von fehlern in datenfernuebertragungsanlagen
JPS54159105A (en) * 1978-06-07 1979-12-15 Hitachi Ltd Multiple signal-distribution unit
DE2829076A1 (de) * 1978-07-01 1980-01-10 Tekade Felten & Guilleaume Testanordnung fuer datenuebertragungsstrecken
DE2838816A1 (de) * 1978-09-06 1980-03-20 Tekade Felten & Guilleaume Schleifentest fuer datenuebertragungsstrecken
US4402082A (en) * 1980-10-31 1983-08-30 Foster Wheeler Energy Corporation Automatic line termination in distributed industrial process control system
US4498186A (en) * 1980-10-10 1985-02-05 At&T Bell Laboratories Data set diagnostic system
JPS5842328A (ja) * 1981-09-07 1983-03-11 Hitachi Ltd 遠隔折返し制御方式
JPS58175335A (ja) * 1982-04-07 1983-10-14 Hitachi Ltd ル−プ式デ−タ伝送システムのル−プバツク制御方法
JPS59222943A (ja) * 1983-06-01 1984-12-14 Hitachi Ltd 半導体装置
DE3371023D1 (en) * 1983-06-30 1987-05-21 Ibm Interface module for telephone lines
US4977579A (en) * 1984-06-14 1990-12-11 The United States Of America As Represented By The Secretary Of The Navy Test set for a navigational satellite receiver
JPS61264852A (ja) * 1985-05-20 1986-11-22 Fujitsu Ltd ディジタル加入者線試験方式
JPH04315246A (ja) * 1991-04-15 1992-11-06 Mitsubishi Electric Corp 半導体集積回路装置
US5463633A (en) * 1994-02-22 1995-10-31 Rockwell International Corporation Use of at commands to test modem with HP3065
FR2731309A1 (fr) * 1995-03-01 1996-09-06 Trt Telecom Radio Electr Systeme de controle d'une chaine de transmission
DE102004039061A1 (de) * 2004-08-11 2006-02-23 BSH Bosch und Siemens Hausgeräte GmbH Schaltungsanordnung zur Unterdrückung von Störsignalen im Empfangszweig eines Modems eines Hausgerätes
DE102004039396A1 (de) * 2004-08-13 2006-02-23 BSH Bosch und Siemens Hausgeräte GmbH Schaltungsanordnung zur Unterdrückung von Störsignalen im Empfangszweig eines Modems eines Hausgerätes

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2840797A (en) * 1952-08-14 1958-06-24 Westinghouse Electric Corp Supervisory control systems and apparatus
US2864943A (en) * 1954-02-24 1958-12-16 Motorola Inc Central station interrogation via relays of unattended data satellites which answer back
US3655915A (en) * 1970-05-07 1972-04-11 Gen Datacomm Ind Inc Closed loop test method and apparatus for duplex data transmission modem

Also Published As

Publication number Publication date
DE2231869C3 (de) 1981-06-19
JPS5528449B2 (en:Method) 1980-07-28
BE787359A (fr) 1973-02-09
US3743938A (en) 1973-07-03
DE2231869B2 (de) 1980-08-28
DE2231869A1 (de) 1973-02-15
GB1399659A (en) 1975-07-02
JPS4826406A (en:Method) 1973-04-07
IT959320B (it) 1973-11-10
FR2150020A5 (en:Method) 1973-03-30

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