FR2474785B1 - - Google Patents

Info

Publication number
FR2474785B1
FR2474785B1 FR8000388A FR8000388A FR2474785B1 FR 2474785 B1 FR2474785 B1 FR 2474785B1 FR 8000388 A FR8000388 A FR 8000388A FR 8000388 A FR8000388 A FR 8000388A FR 2474785 B1 FR2474785 B1 FR 2474785B1
Authority
FR
France
Prior art keywords
signals
generator
frequency
redundancy
monitoring
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
FR8000388A
Other languages
English (en)
French (fr)
Other versions
FR2474785A1 (fr
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.)
Nokia Inc
Original Assignee
Nokia 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 Nokia Inc filed Critical Nokia Inc
Priority to FR8000388A priority Critical patent/FR2474785A1/fr
Priority to US06/221,471 priority patent/US4385385A/en
Priority to DE8181100003T priority patent/DE3166650D1/de
Priority to AT81100003T priority patent/ATE9940T1/de
Priority to EP81100003A priority patent/EP0032365B1/fr
Priority to JP102581A priority patent/JPS56103584A/ja
Priority to IE29/81A priority patent/IE50950B1/en
Priority to CA000368136A priority patent/CA1152579A/fr
Priority to ZA00810115A priority patent/ZA81115B/xx
Publication of FR2474785A1 publication Critical patent/FR2474785A1/fr
Application granted granted Critical
Publication of FR2474785B1 publication Critical patent/FR2474785B1/fr
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M19/00—Current supply arrangements for telephone systems
    • H04M19/02—Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q1/00—Details of selecting apparatus or arrangements
    • H04Q1/18—Electrical details
    • H04Q1/30—Signalling arrangements; Manipulation of signalling currents
    • H04Q1/44—Signalling arrangements; Manipulation of signalling currents using alternate current
    • H04Q1/444—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies
    • H04Q1/45—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using multi-frequency signalling
    • H04Q1/457—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using multi-frequency signalling with conversion of multifrequency signals into digital signals
    • H04Q1/4575—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using multi-frequency signalling with conversion of multifrequency signals into digital signals which are transmitted in digital form

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Monitoring And Testing Of Transmission In General (AREA)
  • Detection And Prevention Of Errors In Transmission (AREA)
  • Time-Division Multiplex Systems (AREA)
  • Use Of Switch Circuits For Exchanges And Methods Of Control Of Multiplex Exchanges (AREA)
  • Emergency Protection Circuit Devices (AREA)
  • Circuits Of Receivers In General (AREA)
  • Selective Calling Equipment (AREA)
FR8000388A 1980-01-09 1980-01-09 Dispositif de controle d'un generateur numerique de signaux Granted FR2474785A1 (fr)

Priority Applications (9)

Application Number Priority Date Filing Date Title
FR8000388A FR2474785A1 (fr) 1980-01-09 1980-01-09 Dispositif de controle d'un generateur numerique de signaux
US06/221,471 US4385385A (en) 1980-01-09 1980-12-30 Circuit for monitoring a digital signal generator
AT81100003T ATE9940T1 (de) 1980-01-09 1981-01-02 Vorrichtung zum ueberwachen eines digitalen signalgenerators.
EP81100003A EP0032365B1 (fr) 1980-01-09 1981-01-02 Dispositif de contrôle d'un générateur numérique de signaux
DE8181100003T DE3166650D1 (en) 1980-01-09 1981-01-02 Supervision device for a digital signal generator
JP102581A JPS56103584A (en) 1980-01-09 1981-01-07 Digital sigal generator control device
IE29/81A IE50950B1 (en) 1980-01-09 1981-01-08 Circuit for monitoring a digital signal generator
CA000368136A CA1152579A (fr) 1980-01-09 1981-01-08 Dispositif de controle d'un generateur numerique de signaux
ZA00810115A ZA81115B (en) 1980-01-09 1981-01-08 Circuit for monitoring a digital signal generator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8000388A FR2474785A1 (fr) 1980-01-09 1980-01-09 Dispositif de controle d'un generateur numerique de signaux

Publications (2)

Publication Number Publication Date
FR2474785A1 FR2474785A1 (fr) 1981-07-31
FR2474785B1 true FR2474785B1 (oth) 1982-05-28

Family

ID=9237368

Family Applications (1)

Application Number Title Priority Date Filing Date
FR8000388A Granted FR2474785A1 (fr) 1980-01-09 1980-01-09 Dispositif de controle d'un generateur numerique de signaux

Country Status (9)

Country Link
US (1) US4385385A (oth)
EP (1) EP0032365B1 (oth)
JP (1) JPS56103584A (oth)
AT (1) ATE9940T1 (oth)
CA (1) CA1152579A (oth)
DE (1) DE3166650D1 (oth)
FR (1) FR2474785A1 (oth)
IE (1) IE50950B1 (oth)
ZA (1) ZA81115B (oth)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4527272A (en) * 1982-12-06 1985-07-02 Tektronix, Inc. Signature analysis using random probing and signature memory
DE3334367A1 (de) * 1983-09-22 1985-04-11 Siemens AG, 1000 Berlin und 8000 München Anordnung zur erzeugung von sinusspannungen mit unterschiedlicher frequenz und amplitude in einer leitungssimulationseinrichtung einer fernmeldeanlage, insbesondere fernsprechnebenstellenanlage
USRE33461E (en) * 1985-10-16 1990-11-27 Unisys Corporation Generation and diagnostic verification of complex timing cycles
US4726025A (en) * 1985-10-16 1988-02-16 Sperry Corporation Generation and diagnostic verification of complex timing cycles
US7117183B2 (en) * 2001-03-31 2006-10-03 First Data Coroporation Airline ticket payment and reservation system and methods
US20030076562A1 (en) * 2001-10-24 2003-04-24 Photonage, Inc. High speed optical transmitter and receiver with a serializer with a minimum frequency generator

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3582633A (en) * 1968-02-20 1971-06-01 Lockheed Aircraft Corp Method and apparatus for fault detection in a logic circuit
DE1952349B2 (de) * 1969-10-17 1973-06-20 Anordnung zur pruefung eines redundanten regelsystems
FR2098528A5 (oth) * 1970-07-17 1972-03-10 Lannionnais Electronique
US3924181A (en) * 1973-10-16 1975-12-02 Hughes Aircraft Co Test circuitry employing a cyclic code generator
FR2286564A1 (fr) * 1974-09-30 1976-04-23 Roche Bernard Dispositif synthetiseur de signaux a multifrequences
US3988670A (en) * 1975-04-15 1976-10-26 The United States Of America As Represented By The Secretary Of The Navy Automatic testing of digital logic systems
FR2345023A1 (fr) * 1976-03-16 1977-10-14 Labo Cent Telecommunicat Dispositif de verification des tonalites dans un centre de commutation mic
US4108359A (en) * 1977-03-30 1978-08-22 The United States Of America As Represented By The Secretary Of The Army Apparatus for verifying the execution of a sequence of coded instructions

Also Published As

Publication number Publication date
JPS56103584A (en) 1981-08-18
EP0032365A1 (fr) 1981-07-22
US4385385A (en) 1983-05-24
DE3166650D1 (en) 1984-11-22
FR2474785A1 (fr) 1981-07-31
IE810029L (en) 1981-07-09
CA1152579A (fr) 1983-08-23
ATE9940T1 (de) 1984-11-15
IE50950B1 (en) 1986-08-20
ZA81115B (en) 1982-01-27
EP0032365B1 (fr) 1984-10-17

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Legal Events

Date Code Title Description
ST Notification of lapse