IT1072242B - Procedimento e dispositivo per il riconoscimento di segnali telefonici in codice multifrequenza convertiti in forma numerica - Google Patents

Procedimento e dispositivo per il riconoscimento di segnali telefonici in codice multifrequenza convertiti in forma numerica

Info

Publication number
IT1072242B
IT1072242B IT7000776A IT7000776A IT1072242B IT 1072242 B IT1072242 B IT 1072242B IT 7000776 A IT7000776 A IT 7000776A IT 7000776 A IT7000776 A IT 7000776A IT 1072242 B IT1072242 B IT 1072242B
Authority
IT
Italy
Prior art keywords
recognition
procedure
telephone signals
numerical form
code converted
Prior art date
Application number
IT7000776A
Other languages
English (en)
Italian (it)
Inventor
Flavio Melindo
Renato Rocci
Original Assignee
Cselt Centro Studi Lab Telecom
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 Lab Telecom filed Critical Cselt Centro Studi Lab Telecom
Priority to IT7000776A priority Critical patent/IT1072242B/it
Priority to AR26966577A priority patent/AR216659A1/es
Priority to BR7707827A priority patent/BR7707827A/pt
Priority to JP14409877A priority patent/JPS53121408A/ja
Priority to AU31320/77A priority patent/AU507727B2/en
Priority to TR1985777A priority patent/TR19857A/xx
Priority to FR7737621A priority patent/FR2374808A1/fr
Priority to SE7714181A priority patent/SE437102B/sv
Priority to GB5258577A priority patent/GB1566164A/en
Priority to DE19772756251 priority patent/DE2756251C3/de
Priority to MX17182777A priority patent/MX144395A/es
Priority to US05/906,857 priority patent/US4185172A/en
Application granted granted Critical
Publication of IT1072242B publication Critical patent/IT1072242B/it

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

Priority Applications (12)

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
AR26966577A AR216659A1 (es) 1976-12-17 1977-10-20 Receptor numerico de senales en codigo multifrecuencia
BR7707827A BR7707827A (pt) 1976-12-17 1977-11-24 Procedimento e dispositivo para o reconhecimento de sinas telefonicos em codigo de multifrequencia convertidos em sinais numericos
JP14409877A JPS53121408A (en) 1976-12-17 1977-12-02 Method of and device for recognizing multiifrequency coded telephone signal converted to digital format
AU31320/77A AU507727B2 (en) 1976-12-17 1977-12-07 Recognizing Multifrequency Coded Telephone Signals Converted into Digital Foam
TR1985777A TR19857A (tr) 1976-12-17 1977-12-13 Dijital hale cevrilmis cok-frekansh kodlu telefon sinyallerinin taninmasi icin ameliye ve cihaz
FR7737621A FR2374808A1 (fr) 1976-12-17 1977-12-14 Procede et dispositif pour reconnaitre les signaux telephoniques codes en multifrequence transformes en forme numerique
SE7714181A SE437102B (sv) 1976-12-17 1977-12-14 Forfarande for detektering av digitala flerfrekvenskodade insignaler av pcm-typ och digital mottagare for genomforande av forfarandet
GB5258577A GB1566164A (en) 1976-12-17 1977-12-16 Method and apparatus for recognising and producing separated signals from multifrequency coded input signals
DE19772756251 DE2756251C3 (de) 1976-12-17 1977-12-16 Verfahren und Digitalempfänger zum Erkennen von mehrfrequenzcodierten digitalisierten Fernmeldesignalen
MX17182777A MX144395A (es) 1976-12-17 1977-12-16 Mejoras en procedimiento y receptor para el reconocimiento de senales telefonicas en codigo multifrecuencia
US05/906,857 US4185172A (en) 1976-12-17 1978-05-17 Method of and means for detecting digitized multi frequency-coded signals

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 (1)

Publication Number Publication Date
IT1072242B true IT1072242B (it) 1985-04-10

Family

ID=11313285

Family Applications (1)

Application Number Title Priority Date Filing Date
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

Country Status (11)

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

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2440126A1 (fr) * 1978-10-27 1980-05-23 Materiel Telephonique Dispositif et procede de reconnaissance pour recepteur numerique de signaux multifrequences
US4227055A (en) * 1978-12-07 1980-10-07 Bell Telephone Laboratories, Incorporated Multifrequency receiver
CA1111531A (en) * 1979-02-22 1981-10-27 Jackylene K. Hood Digital signalling receiver for receiving pcm tones
NL7903346A (nl) * 1979-04-27 1980-10-29 Bell Telephone Mfg Digitaal signaleringsstelsel.
FR2479631B1 (fr) * 1980-03-28 1986-07-25 Cit Alcatel Dispositif de confirmation de signaux
FR2485843B1 (fr) * 1980-06-25 1986-11-07 Cit Alcatel Recepteur numerique de frequences
IT1148885B (it) * 1980-07-09 1986-12-03 Sits Soc It Telecom Siemens Unita' di controllo della segnalazione di tipo multifrequenza,di particolare applicazione nelle centrali telefonichedi transito di tipo numerico
US4385208A (en) * 1981-04-15 1983-05-24 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
CH672968A5 (es) * 1984-11-30 1990-01-15 Autophon Ascom Ag
JPS61225929A (ja) * 1985-03-30 1986-10-07 Fujitsu Ltd デイジタルト−ンの生成方法
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

Family Cites Families (5)

* 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
CA984068A (en) * 1972-08-10 1976-02-17 Alexander D. Proudfoot Method and apparatus for detecting the presence of signal components of predetermined frequency in a multi-frequency signal
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

Also Published As

Publication number Publication date
DE2756251B2 (de) 1981-03-26
DE2756251A1 (de) 1978-06-22
SE437102B (sv) 1985-02-04
AU507727B2 (en) 1980-02-28
JPS53121408A (en) 1978-10-23
BR7707827A (pt) 1978-08-22
AR216659A1 (es) 1980-01-15
GB1566164A (en) 1980-04-30
AU3132077A (en) 1979-06-14
DE2756251C3 (de) 1981-11-19
MX144395A (es) 1981-10-07
SE7714181L (sv) 1978-06-18
FR2374808A1 (fr) 1978-07-13
FR2374808B1 (es) 1982-03-19
TR19857A (tr) 1980-03-01
JPS5731342B2 (es) 1982-07-03

Similar Documents

Publication Publication Date Title
SE426729B (sv) Festanordning
IT7849302A0 (it) Perfezionamento negli apparecchi di riconoscimento di segnali in fonia
SE7905299L (sv) Anropsteckningsanordning
IT1089043B (it) Dispositivo e procedimento per la combustione di rifiuti
IT1072242B (it) Procedimento e dispositivo per il riconoscimento di segnali telefonici in codice multifrequenza convertiti in forma numerica
IT1123346B (it) Chiave di conversazione
AT360593B (de) Funktelefoniesystem
IT1084673B (it) Dispositivo di sollevamento
NL7713405A (nl) Telefoontoestel.
ATA175777A (de) Sprechfunksystem
SE7712613L (sv) Telefonapparat
SE421577B (sv) Telefonlinjeutrustning
SE415639B (sv) Portabel svarvanordning
IT1113586B (it) Procedimento e dispositivo per il patentamento di vergella
IT1083218B (it) Perfezionamento negli apparecchi telefonici
NO148580C (no) Telefonapparat med tastatur
IT8152873V0 (it) Dispositivo blocca telefono
SE7707799L (sv) Telefonapparat
IT7920700V0 (it) Corpo astiforme in ceramica per accessori da bagno.
PL191026A1 (pl) Uklad telefoniczny
IT1081974B (it) Posto telefonico
AT363524B (de) Fernsprechapparat
SE404337B (sv) Festanordning
SE7606738L (sv) Festanordning
SE7604991L (sv) Festanordning