BR7707827A - PROCEDURE AND DEVICE FOR RECOGNIZING TELEPHONE BELLS IN MULTI-FREQUENCY CODE CONVERTED TO NUMBER SIGNS - Google Patents

PROCEDURE AND DEVICE FOR RECOGNIZING TELEPHONE BELLS IN MULTI-FREQUENCY CODE CONVERTED TO NUMBER SIGNS

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
Portuguese (pt)
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/en

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
BR7707827A 1976-12-17 1977-11-24 PROCEDURE AND DEVICE FOR RECOGNIZING TELEPHONE BELLS IN MULTI-FREQUENCY CODE CONVERTED TO NUMBER SIGNS BR7707827A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT7000776A IT1072242B (en) 1976-12-17 1976-12-17 PROCEDURE AND DEVICE FOR THE RECOGNITION OF TELEPHONE SIGNALS IN MULTIFREQUENCY CODE CONVERTED IN NUMERICAL FORM

Publications (1)

Publication Number Publication Date
BR7707827A true BR7707827A (en) 1978-08-22

Family

ID=11313285

Family Applications (1)

Application Number Title Priority Date Filing Date
BR7707827A BR7707827A (en) 1976-12-17 1977-11-24 PROCEDURE AND DEVICE FOR RECOGNIZING TELEPHONE BELLS IN MULTI-FREQUENCY CODE CONVERTED TO NUMBER SIGNS

Country Status (11)

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

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2440126A1 (en) * 1978-10-27 1980-05-23 Materiel Telephonique RECOGNITION DEVICE AND METHOD FOR A DIGITAL MULTI-FREQUENCY SIGNAL RECEIVER
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 (en) * 1979-04-27 1980-10-29 Bell Telephone Mfg DIGITAL SIGNALING SYSTEM.
FR2479631B1 (en) * 1980-03-28 1986-07-25 Cit Alcatel SIGNAL CONFIRMATION DEVICE
FR2485843B1 (en) * 1980-06-25 1986-11-07 Cit Alcatel DIGITAL FREQUENCY RECEIVER
IT1148885B (en) * 1980-07-09 1986-12-03 Sits Soc It Telecom Siemens MULTIFREQUENCY TYPE SIGNALING CONTROL UNIT, OF PARTICULAR APPLICATION IN TELEPHONE UNITS FOR NUMERIC TYPES OF TRANSIT
US4385208A (en) * 1981-04-15 1983-05-24 Bell Telephone Laboratories, Incorporated Multifrequency receiver
DE3424327A1 (en) * 1984-07-02 1986-01-09 Philips Patentverwaltung Gmbh, 2000 Hamburg Method and circuit arrangement for identifying the envelope curves of signal components of a multi-frequency coded dial signal
CH672968A5 (en) * 1984-11-30 1990-01-15 Autophon Ascom Ag
JPS61225929A (en) * 1985-03-30 1986-10-07 Fujitsu Ltd Method for generating digital tone
US4783845A (en) * 1985-12-20 1988-11-08 Itt Aerospace Optical Digital tone squelch detector
JPS62204652A (en) * 1986-03-04 1987-09-09 Nec Corp Audible frequency signal identification system
CA2924815C (en) * 2013-09-20 2017-06-20 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 (en) * 1973-12-12 1975-06-16 Philips Nv MFC RECEIVER FOR DIGITAL SIGNAL PROCESSING.
FR2295665A1 (en) * 1974-12-18 1976-07-16 Labo Cent Telecommunicat MULTI-FREQUENCY DIGITAL SIGNAL RECEIVER
DE2515769A1 (en) * 1975-04-10 1976-10-21 Standard Elektrik Lorenz Ag FREQUENCY SELECTIVE SIGNAL RECEIVER

Also Published As

Publication number Publication date
DE2756251A1 (en) 1978-06-22
JPS53121408A (en) 1978-10-23
FR2374808A1 (en) 1978-07-13
JPS5731342B2 (en) 1982-07-03
AU3132077A (en) 1979-06-14
DE2756251C3 (en) 1981-11-19
SE7714181L (en) 1978-06-18
SE437102B (en) 1985-02-04
FR2374808B1 (en) 1982-03-19
TR19857A (en) 1980-03-01
DE2756251B2 (en) 1981-03-26
IT1072242B (en) 1985-04-10
AU507727B2 (en) 1980-02-28
AR216659A1 (en) 1980-01-15
GB1566164A (en) 1980-04-30
MX144395A (en) 1981-10-07

Similar Documents

Publication Publication Date Title
MX147075A (en) IMPROVEMENTS IN COMBINED LABELS AND METHOD TO PRODUCE IT
BR7707827A (en) PROCEDURE AND DEVICE FOR RECOGNIZING TELEPHONE BELLS IN MULTI-FREQUENCY CODE CONVERTED TO NUMBER SIGNS
MX147083A (en) IMPROVEMENTS IN ELECTRONIC MUSICAL DEVICE
AT354165B (en) ID CARD
BR7706685A (en) APPARATUS AND PROCESS FOR AGING DISTILLED ALCOHOLIC EXTRACTS
AR223131A1 (en) A PROCEDURE FOR DETECTING AND IDENTIFYING OBJECTS MARKED IN MAGNETIC BANDS, A HALF-MARKER WITH A MAGNETIC BAND TO BE USED IN SUCH PROCEDURE AND A DEVICE TO TAKE THE REFERRED PROCEDURE IN PRACTICE
SE433016B (en) IDENTIFICATION DEVICE
SE416914B (en) TICKET
IT8024120A0 (en) PROCEDURE AND DEVICE TO ELIMINATE AN IRREGULARITY IN A WIRE.
IT1072595B (en) COMPUTERIZED TICKET
IT1157708B (en) PORTABLE SIGNALING DEVICE
IT1203164B (en) PROCEDURE AND IDENTIFICATION DEVICE FOR CODED LABELS
BR7803096A (en) ELECTRONIC BELL FOR USE IN TELEPHONE DEVICES
FR2330097A1 (en) SELF-ADHESIVE LETTERS AND SIGNS
IT1165609B (en) PROCEDURE AND MAGNETIC CODING DEVICE MODIFYABLE IN OVERLAP
IT1203105B (en) DEVICE TO FORM TRANSFER CODES ON WINDED SPOOLS
DK3178A (en) CODED ADVERTISING COUPON
BR7605917A (en) WATER STERELIZATION PROCESS AND DEVICE
IT1106969B (en) PROCEDURE AND SIGNALING DEVICE IN A NUMERICAL COMMUNICATION SYSTEM
BR7706853A (en) IMPROVEMENT IN DIALIASIS DEVICE AND PROCESS TO PRODUCE THE DEVICE
IT1072865B (en) COIN METHOD AND DEVICE
IT1055258B (en) FOREWORD AND FORMS RECOGNITION DEVICE
BR7700407A (en) CHAINSAW CHAINSAW AND ITS GUIDE BAR SETS AND ANTI-KEEPING DEVICE
MX4412E (en) IMPROVEMENTS IN A SINGLE KEY CHORD SYSTEM FOR ELECTRONIC KEYBOARD INSTRUMENT
IT1058698B (en) LAMINATION PROCESS AND RELATED APPARATUS