BR7707827A - Procedimento e dispositivo para o reconhecimento de sinas telefonicos em codigo de multifrequencia convertidos em sinais numericos - Google Patents

Procedimento e dispositivo para o reconhecimento de sinas telefonicos em codigo de multifrequencia convertidos em sinais numericos

Info

Publication number
BR7707827A
BR7707827A BR7707827A BR7707827A BR7707827A BR 7707827 A BR7707827 A BR 7707827A BR 7707827 A BR7707827 A BR 7707827A BR 7707827 A BR7707827 A BR 7707827A BR 7707827 A BR7707827 A BR 7707827A
Authority
BR
Brazil
Prior art keywords
procedure
frequency code
code converted
number signs
recognizing telephone
Prior art date
Application number
BR7707827A
Other languages
English (en)
Inventor
F Melindo
R Tocci
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
Publication of BR7707827A publication Critical patent/BR7707827A/pt

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)
BR7707827A 1976-12-17 1977-11-24 Procedimento e dispositivo para o reconhecimento de sinas telefonicos em codigo de multifrequencia convertidos em sinais numericos BR7707827A (pt)

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
BR7707827A true BR7707827A (pt) 1978-08-22

Family

ID=11313285

Family Applications (1)

Application Number Title Priority Date Filing Date
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

Country Status (11)

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

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 (pt) * 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
EP3047618B1 (en) * 2013-09-20 2023-11-08 Otsuka Pharmaceutical Co., Ltd. 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
FR2374808A1 (fr) 1978-07-13
MX144395A (es) 1981-10-07
DE2756251B2 (de) 1981-03-26
AR216659A1 (es) 1980-01-15
SE437102B (sv) 1985-02-04
TR19857A (tr) 1980-03-01
SE7714181L (sv) 1978-06-18
FR2374808B1 (pt) 1982-03-19
GB1566164A (en) 1980-04-30
AU3132077A (en) 1979-06-14
JPS53121408A (en) 1978-10-23
DE2756251C3 (de) 1981-11-19
DE2756251A1 (de) 1978-06-22
IT1072242B (it) 1985-04-10
AU507727B2 (en) 1980-02-28
JPS5731342B2 (pt) 1982-07-03

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