FR2374808A1 - Procede et dispositif pour reconnaitre les signaux telephoniques codes en multifrequence transformes en forme numerique - Google Patents

Procede et dispositif pour reconnaitre les signaux telephoniques codes en multifrequence transformes en forme numerique

Info

Publication number
FR2374808A1
FR2374808A1 FR7737621A FR7737621A FR2374808A1 FR 2374808 A1 FR2374808 A1 FR 2374808A1 FR 7737621 A FR7737621 A FR 7737621A FR 7737621 A FR7737621 A FR 7737621A FR 2374808 A1 FR2374808 A1 FR 2374808A1
Authority
FR
France
Prior art keywords
signals
digital form
value
exchange
telephone signals
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
FR7737621A
Other languages
English (en)
French (fr)
Other versions
FR2374808B1 (it
Inventor
Flavio Melindo
Renato Rocci
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.)
Telecom Italia SpA
Original Assignee
CSELT Centro Studi e Laboratori Telecomunicazioni SpA
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 CSELT Centro Studi e Laboratori Telecomunicazioni SpA filed Critical CSELT Centro Studi e Laboratori Telecomunicazioni SpA
Publication of FR2374808A1 publication Critical patent/FR2374808A1/fr
Application granted granted Critical
Publication of FR2374808B1 publication Critical patent/FR2374808B1/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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q11/00—Selecting arrangements for multiplex systems
    • H04Q11/04—Selecting arrangements for multiplex systems for time-division multiplexing

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)
FR7737621A 1976-12-17 1977-12-14 Procede et dispositif pour reconnaitre les signaux telephoniques codes en multifrequence transformes en forme numerique Granted FR2374808A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT7000776A IT1072242B (it) 1976-12-17 1976-12-17 Procedimento e dispositivo per il riconoscimento di segnali telefonici in codice multifrequenza convertiti in forma numerica

Publications (2)

Publication Number Publication Date
FR2374808A1 true FR2374808A1 (fr) 1978-07-13
FR2374808B1 FR2374808B1 (it) 1982-03-19

Family

ID=11313285

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7737621A Granted FR2374808A1 (fr) 1976-12-17 1977-12-14 Procede et dispositif pour reconnaitre les signaux telephoniques codes en multifrequence transformes en forme numerique

Country Status (11)

Country Link
JP (1) JPS53121408A (it)
AR (1) AR216659A1 (it)
AU (1) AU507727B2 (it)
BR (1) BR7707827A (it)
DE (1) DE2756251C3 (it)
FR (1) FR2374808A1 (it)
GB (1) GB1566164A (it)
IT (1) IT1072242B (it)
MX (1) MX144395A (it)
SE (1) SE437102B (it)
TR (1) TR19857A (it)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0011018A1 (fr) * 1978-10-27 1980-05-14 Le Materiel Telephonique Thomson-Csf Dispositif et procédé de reconnaissance pour récepteur numérique de signaux multifréquences
FR2450017A1 (fr) * 1979-02-22 1980-09-19 Northern Telecom Ltd Recepteur pour signalisation numerique destine a la reception de sons modules par impulsions codees (mic)
FR2479631A1 (fr) * 1980-03-28 1981-10-02 Cit Alcatel Dispositif de confirmation de signaux
FR2485843A1 (fr) * 1980-06-25 1981-12-31 Cit Alcatel Recepteur numerique de frequences
FR2486748A1 (fr) * 1980-07-09 1982-01-15 Italtel Spa Unite de controle de la signalisation de type multifrequence, s'appliquant particulierement aux centraux telephoniques de transit de type numerique
US4355405A (en) * 1979-04-27 1982-10-19 International Standard Electric Corporation Digital signalling system
FR2504329A1 (fr) * 1981-04-15 1982-10-22 Western Electric Co Recepteur multifrequence
EP0184984A1 (de) * 1984-11-30 1986-06-18 Ascom Autophon Ag Auswerteeinrichtung für ein impulsweise auftretendes Tonsignal
EP0197433A2 (en) * 1985-03-30 1986-10-15 Fujitsu Limited Switching system having a tone trunk and method for generating digital codes therein

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4227055A (en) * 1978-12-07 1980-10-07 Bell Telephone Laboratories, Incorporated Multifrequency receiver
DE3424327A1 (de) * 1984-07-02 1986-01-09 Philips Patentverwaltung Gmbh, 2000 Hamburg Verfahren und schaltungsanordnung zur bestimmung der einhuellenden von signalkomponenten eines mehrfrequenzcodierten wahlzeichens
US4783845A (en) * 1985-12-20 1988-11-08 Itt Aerospace Optical Digital tone squelch detector
JPS62204652A (ja) * 1986-03-04 1987-09-09 Nec Corp 可聴周波信号識別方式
CA2965941C (en) * 2013-09-20 2020-01-28 Proteus Digital Health, Inc. Methods, devices and systems for receiving and decoding a signal in the presence of noise using slices and warping

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2195797A1 (it) * 1972-08-10 1974-03-08 Commw Of Australia

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3773981A (en) * 1972-08-07 1973-11-20 Ibm Parallel tone multiplexer-receiver
NL7316990A (nl) * 1973-12-12 1975-06-16 Philips Nv Mfc-ontvanger voor digitale signaalverwerking.
FR2295665A1 (fr) * 1974-12-18 1976-07-16 Labo Cent Telecommunicat Recepteur numerique de signaux multifrequences
DE2515769A1 (de) * 1975-04-10 1976-10-21 Standard Elektrik Lorenz Ag Frequenzselektiver signalempfaenger

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2195797A1 (it) * 1972-08-10 1974-03-08 Commw Of Australia

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
NV8089/76 *
NV8089/77 *

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0011018A1 (fr) * 1978-10-27 1980-05-14 Le Materiel Telephonique Thomson-Csf Dispositif et procédé de reconnaissance pour récepteur numérique de signaux multifréquences
FR2440126A1 (fr) * 1978-10-27 1980-05-23 Materiel Telephonique Dispositif et procede de reconnaissance pour recepteur numerique de signaux multifrequences
FR2450017A1 (fr) * 1979-02-22 1980-09-19 Northern Telecom Ltd Recepteur pour signalisation numerique destine a la reception de sons modules par impulsions codees (mic)
US4355405A (en) * 1979-04-27 1982-10-19 International Standard Electric Corporation Digital signalling system
FR2479631A1 (fr) * 1980-03-28 1981-10-02 Cit Alcatel Dispositif de confirmation de signaux
EP0037048A1 (fr) * 1980-03-28 1981-10-07 COMPAGNIE INDUSTRIELLE DES TELECOMMUNICATIONS CIT-ALCATEL S.A. dite: Dispositif de confirmation de signaux
EP0043320A1 (fr) * 1980-06-25 1982-01-06 COMPAGNIE INDUSTRIELLE DES TELECOMMUNICATIONS CIT-ALCATEL S.A. dite: Récepteur numérique de fréquences
FR2485843A1 (fr) * 1980-06-25 1981-12-31 Cit Alcatel Recepteur numerique de frequences
FR2486748A1 (fr) * 1980-07-09 1982-01-15 Italtel Spa Unite de controle de la signalisation de type multifrequence, s'appliquant particulierement aux centraux telephoniques de transit de type numerique
FR2504329A1 (fr) * 1981-04-15 1982-10-22 Western Electric Co Recepteur multifrequence
EP0184984A1 (de) * 1984-11-30 1986-06-18 Ascom Autophon Ag Auswerteeinrichtung für ein impulsweise auftretendes Tonsignal
CH672968A5 (it) * 1984-11-30 1990-01-15 Autophon Ascom Ag
EP0197433A2 (en) * 1985-03-30 1986-10-15 Fujitsu Limited Switching system having a tone trunk and method for generating digital codes therein
EP0197433A3 (en) * 1985-03-30 1988-08-24 Fujitsu Limited Switching system having a tone trunk and method for generating digital codes therein

Also Published As

Publication number Publication date
MX144395A (es) 1981-10-07
DE2756251A1 (de) 1978-06-22
TR19857A (tr) 1980-03-01
FR2374808B1 (it) 1982-03-19
IT1072242B (it) 1985-04-10
AU3132077A (en) 1979-06-14
AU507727B2 (en) 1980-02-28
GB1566164A (en) 1980-04-30
DE2756251C3 (de) 1981-11-19
BR7707827A (pt) 1978-08-22
SE7714181L (sv) 1978-06-18
SE437102B (sv) 1985-02-04
JPS5731342B2 (it) 1982-07-03
DE2756251B2 (de) 1981-03-26
JPS53121408A (en) 1978-10-23
AR216659A1 (es) 1980-01-15

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Legal Events

Date Code Title Description
ST Notification of lapse