FR2450017A1 - RECEIVER FOR DIGITAL SIGNALING FOR THE RECEPTION OF SOUND MODULES BY PULSE CODE (MIC) - Google Patents

RECEIVER FOR DIGITAL SIGNALING FOR THE RECEPTION OF SOUND MODULES BY PULSE CODE (MIC)

Info

Publication number
FR2450017A1
FR2450017A1 FR8003681A FR8003681A FR2450017A1 FR 2450017 A1 FR2450017 A1 FR 2450017A1 FR 8003681 A FR8003681 A FR 8003681A FR 8003681 A FR8003681 A FR 8003681A FR 2450017 A1 FR2450017 A1 FR 2450017A1
Authority
FR
France
Prior art keywords
signals
mic
filter
receiver
reception
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.)
Granted
Application number
FR8003681A
Other languages
French (fr)
Other versions
FR2450017B1 (en
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/en
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)
  • Interface Circuits In Exchanges (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
  • Use Of Switch Circuits For Exchanges And Methods Of Control Of Multiplex Exchanges (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Electrophonic Musical Instruments (AREA)

Abstract

LE RECEPTEUR 1B DE L'INVENTION CONVERTIT UNE SIGNALISATION MIC EN FORMAT DE SIGNAL COMPATIBLE AVEC UN DISPOSITIF DE COMMANDE D'UN SYSTEME DE COMMUTATION TELEPHONIQUE MULTIPLEX A REPARTITION DANS LE TEMPS 1A. DES SIGNAUX DE COMMANDE SONT PRODUITS EN SYNCHRONISME AVEC LE FONCTIONNEMENT DU SYSTEME DE COMMUTATION POUR COMMANDER UN FILTRE A TEMPS PARTAGE. LE FILTRE EXECUTE DES FILTRAGES AVEC DES SIGNAUX MIC PROVENANT DU SYSTEME 1A ET PRODUIT DES SIGNAUX CONCERNANT CHAQUE FILTRAGE. UN DISPOSITIF DE CONVERSION 50 IDENTIFIE DEUX SIGNAUX DE FILTRE D'AMPLITUDE SUPERIEURE A CELLE DES AUTRES, ET S'ILS RESTENT SENSIBLEMENT ININTERROMPUS A PENDANT UNE DUREE PREDETERMINEE, B DANS UNE CERTAINE GAMME D'AMPLITUDES, ET C SI L'UN DES SIGNAUX A UN RAPPORT SIGNALBRUIT PREDETERMINE PAR RAPPORT A UN AUTRE SIGNAL FILTRE CORRESPONDANT A UN FILTRAGE PASSE-TOUT, LE DISPOSITIF 50 INDIQUE LA RECEPTION D'UNE SIGNALISATION MULTIFREQUENCE EN PRODUISANT DES SIGNAUX DANS LE FORMAT DE SIGNAL REQUIS.THE RECEIVER 1B OF THE INVENTION CONVERTS A MIC SIGNALING INTO SIGNAL FORMAT COMPATIBLE WITH A CONTROL DEVICE OF A TIME-DISTRIBUTED MULTIPLEX TELEPHONE SWITCHING SYSTEM 1A. CONTROL SIGNALS ARE GENERATED IN SYNCHRONISM WITH THE OPERATION OF THE SWITCHING SYSTEM TO CONTROL A TIME-SHARED FILTER. THE FILTER PERFORMS FILTERS WITH MIC SIGNALS FROM SYSTEM 1A AND PRODUCES SIGNALS REGARDING EACH FILTERING. A 50 CONVERSION DEVICE IDENTIFIES TWO FILTER SIGNALS WITH GREATER AMPLITUDE THAN THE OTHERS, AND IF THEY REMAIN SENSITIVELY UNINTERRUPTED A FOR A PREDETERMINED TIME, B IN A SOME RANGE OF AMPLITUDE, AND C IF ONE OF THE SIGNALS A A PREDETERMINED SIGNAL NOISE RATIO TO ANOTHER FILTER SIGNAL CORRESPONDING TO MASTER FILTERING, DEVICE 50 INDICATES RECEPTION OF MULTI-FREQUENCY SIGNALING BY GENERATING SIGNALS IN THE REQUIRED SIGNAL FORMAT.

FR8003681A 1979-02-22 1980-02-20 RECEIVER FOR DIGITAL SIGNALING FOR THE RECEPTION OF SOUND MODULES BY PULSE CODE (MIC) Granted FR2450017A1 (en)

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 true FR2450017A1 (en) 1980-09-19
FR2450017B1 FR2450017B1 (en) 1984-05-11

Family

ID=4113607

Family Applications (1)

Application Number Title Priority Date Filing Date
FR8003681A Granted FR2450017A1 (en) 1979-02-22 1980-02-20 RECEIVER FOR DIGITAL SIGNALING FOR THE RECEPTION OF SOUND MODULES BY PULSE CODE (MIC)

Country Status (9)

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

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2504754A1 (en) * 1981-04-27 1982-10-29 Thomson Csf Mat Tel Sequencer for ROMs in digital waveform generator - uses program in master ROM to control operational sequences from slave ROMs via clocked bistable multivibrator circuits

Families Citing this family (3)

* 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
US4519072A (en) * 1982-11-10 1985-05-21 Rockwell International Corporation Answer supervision system
JPH07171782A (en) * 1991-07-16 1995-07-11 Haruo Konagai Vacuum suction device

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3683162A (en) * 1968-07-30 1972-08-08 Cit Alcatel Digital filtering for detecting component frequencies from a set of predetermined frequencies
US3863030A (en) * 1972-06-01 1975-01-28 Gte Automatic Electric Lab Inc Pcm tone receiver using digital spectrum analysis
FR2374808A1 (en) * 1976-12-17 1978-07-13 Cselt Centro Studi Lab Telecom METHOD AND DEVICE FOR RECOGNIZING TELEPHONE SIGNALS CODED IN MULTI-FREQUENCY TRANSFORMED INTO DIGITAL FORM

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51112218A (en) * 1975-03-28 1976-10-04 Hitachi Ltd Multifrequency signal receiver
JPS5918916B2 (en) * 1975-10-06 1984-05-01 株式会社日立製作所 multifrequency signal receiver

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3683162A (en) * 1968-07-30 1972-08-08 Cit Alcatel Digital filtering for detecting component frequencies from a set of predetermined frequencies
US3863030A (en) * 1972-06-01 1975-01-28 Gte Automatic Electric Lab Inc Pcm tone receiver using digital spectrum analysis
FR2374808A1 (en) * 1976-12-17 1978-07-13 Cselt Centro Studi Lab Telecom METHOD AND DEVICE FOR RECOGNIZING TELEPHONE SIGNALS CODED IN MULTI-FREQUENCY TRANSFORMED INTO DIGITAL FORM

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
COMMUTATION ET ELECTRONIQUE, no.59, octobre 1977, ISSY Les Moulineaux *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2504754A1 (en) * 1981-04-27 1982-10-29 Thomson Csf Mat Tel Sequencer for ROMs in digital waveform generator - uses program in master ROM to control operational sequences from slave ROMs via clocked bistable multivibrator circuits

Also Published As

Publication number Publication date
IT8019986A0 (en) 1980-02-18
SE452388B (en) 1987-11-23
SE8001315L (en) 1980-08-23
NL8001026A (en) 1980-08-26
FR2450017B1 (en) 1984-05-11
IT8019986A1 (en) 1981-08-18
GB2044039B (en) 1983-05-11
DE3005740A1 (en) 1980-09-04
CA1111531A (en) 1981-10-27
IT1140634B (en) 1986-10-01
AT386312B (en) 1988-08-10
GB2044039A (en) 1980-10-08
JPS55137788A (en) 1980-10-27
ATA96280A (en) 1987-12-15

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Legal Events

Date Code Title Description
ST Notification of lapse