FR2450017B1 - - Google Patents

Info

Publication number
FR2450017B1
FR2450017B1 FR8003681A FR8003681A FR2450017B1 FR 2450017 B1 FR2450017 B1 FR 2450017B1 FR 8003681 A FR8003681 A FR 8003681A FR 8003681 A FR8003681 A FR 8003681A FR 2450017 B1 FR2450017 B1 FR 2450017B1
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.)
Expired
Application number
FR8003681A
Other languages
French (fr)
Other versions
FR2450017A1 (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.)
Nortel Networks Ltd
Original Assignee
Northern Telecom Ltd
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 Northern Telecom Ltd filed Critical Northern Telecom Ltd
Publication of FR2450017A1 publication Critical patent/FR2450017A1/fr
Application granted granted Critical
Publication of FR2450017B1 publication Critical patent/FR2450017B1/fr
Granted legal-status Critical Current

Links

Classifications

    • 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)
  • Computer Networks & Wireless Communication (AREA)
  • Time-Division Multiplex Systems (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
  • Interface Circuits In Exchanges (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Electrophonic Musical Instruments (AREA)
  • Use Of Switch Circuits For Exchanges And Methods Of Control Of Multiplex Exchanges (AREA)
FR8003681A 1979-02-22 1980-02-20 Recepteur pour signalisation numerique destine a la reception de sons modules par impulsions codees (mic) Granted FR2450017A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA322,112A CA1111531A (en) 1979-02-22 1979-02-22 Digital signalling receiver for receiving pcm tones

Publications (2)

Publication Number Publication Date
FR2450017A1 FR2450017A1 (fr) 1980-09-19
FR2450017B1 true FR2450017B1 (de) 1984-05-11

Family

ID=4113607

Family Applications (1)

Application Number Title Priority Date Filing Date
FR8003681A Granted FR2450017A1 (fr) 1979-02-22 1980-02-20 Recepteur pour signalisation numerique destine a la reception de sons modules par impulsions codees (mic)

Country Status (9)

Country Link
JP (1) JPS55137788A (de)
AT (1) AT386312B (de)
CA (1) CA1111531A (de)
DE (1) DE3005740A1 (de)
FR (1) FR2450017A1 (de)
GB (1) GB2044039B (de)
IT (1) IT1140634B (de)
NL (1) NL8001026A (de)
SE (1) SE452388B (de)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5779751A (en) * 1980-11-05 1982-05-19 Nec Corp Signal receiver
FR2504754A1 (fr) * 1981-04-27 1982-10-29 Thomson Csf Mat Tel Dispositif sequenceur a memoires mortes
US4519072A (en) * 1982-11-10 1985-05-21 Rockwell International Corporation Answer supervision system
JPH07171782A (ja) * 1991-07-16 1995-07-11 Haruo Konagai 真空吸着装置

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1603175A (de) * 1968-07-30 1971-03-22
US3863030A (en) * 1972-06-01 1975-01-28 Gte Automatic Electric Lab Inc Pcm tone receiver using digital spectrum analysis
JPS51112218A (en) * 1975-03-28 1976-10-04 Hitachi Ltd Multifrequency signal receiver
JPS5918916B2 (ja) * 1975-10-06 1984-05-01 株式会社日立製作所 多周波信号受信器
IT1072242B (it) * 1976-12-17 1985-04-10 Cselt Centro Studi Lab Telecom Procedimento e dispositivo per il riconoscimento di segnali telefonici in codice multifrequenza convertiti in forma numerica

Also Published As

Publication number Publication date
FR2450017A1 (fr) 1980-09-19
AT386312B (de) 1988-08-10
GB2044039B (en) 1983-05-11
GB2044039A (en) 1980-10-08
SE452388B (sv) 1987-11-23
CA1111531A (en) 1981-10-27
SE8001315L (sv) 1980-08-23
JPS55137788A (en) 1980-10-27
IT8019986A1 (it) 1981-08-18
IT8019986A0 (it) 1980-02-18
ATA96280A (de) 1987-12-15
NL8001026A (nl) 1980-08-26
DE3005740A1 (de) 1980-09-04
IT1140634B (it) 1986-10-01

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Legal Events

Date Code Title Description
ST Notification of lapse