CA952197A - Closed loop test method and apparatus for duplex data transmission modem - Google Patents

Closed loop test method and apparatus for duplex data transmission modem

Info

Publication number
CA952197A
CA952197A CA106,773A CA106773A CA952197A CA 952197 A CA952197 A CA 952197A CA 106773 A CA106773 A CA 106773A CA 952197 A CA952197 A CA 952197A
Authority
CA
Canada
Prior art keywords
data transmission
test method
closed loop
loop test
duplex 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
CA106,773A
Other languages
English (en)
Other versions
CA106773S (en
Inventor
Richard A. Liberman
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 CA952197A publication Critical patent/CA952197A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/10—Frequency-modulated carrier systems, i.e. using frequency-shift keying
    • 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)
  • Monitoring And Testing Of Transmission In General (AREA)
CA106,773A 1970-05-07 1971-03-03 Closed loop test method and apparatus for duplex data transmission modem Expired CA952197A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US3545470A 1970-05-07 1970-05-07

Publications (1)

Publication Number Publication Date
CA952197A true CA952197A (en) 1974-07-30

Family

ID=21882775

Family Applications (1)

Application Number Title Priority Date Filing Date
CA106,773A Expired CA952197A (en) 1970-05-07 1971-03-03 Closed loop test method and apparatus for duplex data transmission modem

Country Status (4)

Country Link
US (1) US3655915A (fr)
BE (1) BE788177Q (fr)
CA (1) CA952197A (fr)
GB (1) GB1389939A (fr)

Families Citing this family (35)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3398234A (en) * 1964-08-04 1968-08-20 American Telephone & Telegraph Multiple address circuit
DE2102511C3 (de) * 1971-01-20 1974-01-03 Vierling, Oskar, Prof. Dr.Phil. Habil., 8553 Ebermannstadt Verfahren zum Messen der frequenzabhängigen Dämpfung einer Zweidrahtleitung
US3767856A (en) * 1971-07-20 1973-10-23 Burroughs Corp Data set tester
US3739338A (en) * 1971-07-23 1973-06-12 Xerox Corp Data coupling apparatus
US3743938A (en) * 1971-08-10 1973-07-03 Gen Datacomm Ind Inc Closed data loop test apparatus for data transmission modem
US3715496A (en) * 1971-10-21 1973-02-06 Ibm Digital band-pass filter for a single circuit full duplex transmission system
BE788949A (fr) * 1971-11-01 1973-03-19 Gen Datacomm Ind Inc Procede d'essai de modulateur-demodulateur
US3869580A (en) * 1971-11-15 1975-03-04 Milgo Electronic Corp Apparatus for testing data modems which simultaneously transmit and receive frequency multiplexed signals
US3869577A (en) * 1972-04-24 1975-03-04 Gen Datacomm Ind Inc Method and apparatus for control signaling 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
US3952163A (en) * 1972-04-24 1976-04-20 General Datacomm Industries, Inc. Method and apparatus for testing in FDM system
US3819878A (en) * 1972-12-18 1974-06-25 Antekna Inc Transmission test set for telephone circuit data communication systems
FR2230131B1 (fr) * 1973-05-14 1977-02-11 Honeywell Bull Soc Ind
US3846582A (en) * 1973-08-06 1974-11-05 Bell Telephone Labor Inc Data transmission terminal for fsk frequency duplexed systems
US3956589A (en) * 1973-11-26 1976-05-11 Paradyne Corporation Data telecommunication system
US3937882A (en) * 1974-04-11 1976-02-10 Vadic Corporation Full-duplex communication system on a two wire line
US4031329A (en) * 1974-06-13 1977-06-21 International Telephone And Telegraph Corporation Time limited telephone paging employs a relay switch actuated by dual frequency tone
US3956601A (en) * 1974-10-17 1976-05-11 Paradyne Corporation Telecommunications analyzer
GB1540900A (en) * 1975-06-30 1979-02-21 Ericsson L M Pty Ltd Digital testing and power control in a digital communication system
DE2530633C3 (de) * 1975-07-09 1979-04-05 Siemens Ag, 1000 Berlin Und 8000 Muenchen Verfahren zur automatischen Überprüfung der Funktionstüchtigkeit von Datenübertragungssystemen
US4101833A (en) * 1977-03-07 1978-07-18 The Vadic Corporation Duplex data transmission modem utilizing an injected tone for shifting power within the transmit spectrum
FR2386202A1 (fr) * 1977-03-31 1978-10-27 Cit Alcatel Dispositif de test en local pour un equipement de transmission de donnees duplex
FR2404970A1 (fr) * 1977-10-03 1979-04-27 Sfena Systeme de couplage pour transmission en duplex de donnees numeriques entre deux unites de traitement
DE2807785A1 (de) * 1978-02-23 1979-08-30 Siemens Ag Digitales nachrichtenuebertragungssystem
DE2829076A1 (de) * 1978-07-01 1980-01-10 Tekade Felten & Guilleaume Testanordnung fuer datenuebertragungsstrecken
EP0014583A1 (fr) * 1979-02-13 1980-08-20 Macwell Systems Limited Perfectionnements aux appareils de détection d'erreurs
FR2476946A1 (fr) * 1980-02-26 1981-08-28 Thomson Csf Modulateur-demodulateur a transfert de charges.
FR2485306A1 (fr) * 1980-06-23 1981-12-24 Trt Telecom Radio Electr Systeme de test local d'un modem utilisant la modulation par deplacement de frequence
US4471489A (en) * 1981-03-19 1984-09-11 General Datacomm Industries, Inc. Automatic answer/originate mode selection in modem
US4481622A (en) * 1982-04-01 1984-11-06 Anderson Jacobson, Inc. High speed dial-up telephone circuit full duplex data transmission techniques
US4654881A (en) * 1984-01-04 1987-03-31 Motorola, Inc. Remote control system having symmetrical tone, send/receive signaling circuits for radio communications
US4660194A (en) * 1984-04-05 1987-04-21 New York Telephone Company Method and apparatus for testing a subscriber's line circuit in a packet switched multiplexed data/voice communication system
EP0176646B1 (fr) * 1984-08-24 1988-07-20 International Business Machines Corporation Circuit d'interface de ligne
US7133441B1 (en) * 1999-02-23 2006-11-07 Actelis Networks Inc. High speed access system over copper cable plant
KR100467587B1 (ko) * 2002-06-07 2005-01-24 삼성전자주식회사 팩시 밀리의 자기 진단 방법 및 이 방법을 수행하는팩시밀리

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2864942A (en) * 1955-03-11 1958-12-16 Aircraft Radio Corp Receiver tuning in two-way radio
US2871289A (en) * 1955-10-10 1959-01-27 Gen Electric Error-checking system
US3049692A (en) * 1957-07-15 1962-08-14 Ibm Error detection circuit

Also Published As

Publication number Publication date
GB1389939A (en) 1975-04-09
US3655915A (en) 1972-04-11
BE788177Q (fr) 1972-12-18

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