ZA757642B - Digital multifrequency signals receiver - Google Patents

Digital multifrequency signals receiver

Info

Publication number
ZA757642B
ZA757642B ZA757642A ZA757642A ZA757642B ZA 757642 B ZA757642 B ZA 757642B ZA 757642 A ZA757642 A ZA 757642A ZA 757642 A ZA757642 A ZA 757642A ZA 757642 B ZA757642 B ZA 757642B
Authority
ZA
South Africa
Prior art keywords
signals receiver
multifrequency signals
digital multifrequency
digital
receiver
Prior art date
Application number
ZA757642A
Inventor
Michael Louis Avignon
Louis Avignon Michael
Jean-Pierre Chevillon
Chevillon Jean-Pierre
Original Assignee
Int Standard Electric Corp
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 Int Standard Electric Corp filed Critical Int Standard Electric Corp
Publication of ZA757642B publication Critical patent/ZA757642B/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
ZA757642A 1974-12-18 1975-12-05 Digital multifrequency signals receiver ZA757642B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7441711A FR2295665A1 (en) 1974-12-18 1974-12-18 MULTI-FREQUENCY DIGITAL SIGNAL RECEIVER

Publications (1)

Publication Number Publication Date
ZA757642B true ZA757642B (en) 1976-11-24

Family

ID=9146325

Family Applications (1)

Application Number Title Priority Date Filing Date
ZA757642A ZA757642B (en) 1974-12-18 1975-12-05 Digital multifrequency signals receiver

Country Status (5)

Country Link
DE (1) DE2556354C2 (en)
FR (1) FR2295665A1 (en)
GB (1) GB1492310A (en)
IE (1) IE42621B1 (en)
ZA (1) ZA757642B (en)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2373926A1 (en) * 1976-12-10 1978-07-07 Constr Telephoniques MULTI-FREQUENCY SIGNAL RECEIVER
IT1072242B (en) * 1976-12-17 1985-04-10 Cselt Centro Studi Lab Telecom PROCEDURE AND DEVICE FOR THE RECOGNITION OF TELEPHONE SIGNALS IN MULTIFREQUENCY CODE CONVERTED IN NUMERICAL FORM
FR2440126A1 (en) * 1978-10-27 1980-05-23 Materiel Telephonique RECOGNITION DEVICE AND METHOD FOR A DIGITAL MULTI-FREQUENCY SIGNAL RECEIVER
NL7903346A (en) * 1979-04-27 1980-10-29 Bell Telephone Mfg DIGITAL SIGNALING SYSTEM.
CA1137565A (en) * 1979-05-22 1982-12-14 Masaharu Kawaguchi Digital multi-frequency receiver
US4460808A (en) * 1982-08-23 1984-07-17 At&T Bell Laboratories Adaptive signal receiving method and apparatus
DD266253A3 (en) * 1987-06-22 1989-03-29 Leipzig Rft Nachrichtenelekt UNIVERSAL DIGITAL MFC RECEPTIONER
DE3743755C2 (en) * 1987-12-23 1996-09-05 Sel Alcatel Ag Method and device for the secure transmission of block information between track interlockings
US4833399A (en) * 1988-06-13 1989-05-23 Texas Instruments Incorporated DTMF receiver

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1603175A (en) * 1968-07-30 1971-03-22
US3706076A (en) * 1970-12-21 1972-12-12 Bell Telephone Labor Inc Programmable digital filter apparatus

Also Published As

Publication number Publication date
DE2556354A1 (en) 1976-06-24
IE42621B1 (en) 1980-09-10
FR2295665A1 (en) 1976-07-16
IE42621L (en) 1976-06-18
DE2556354C2 (en) 1984-03-08
GB1492310A (en) 1977-11-16
FR2295665B1 (en) 1978-07-13

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