DE1487640A1 - Verfahren zur UEbertragung von Zifferinformationen mittels tonfrequenter Zeichen - Google Patents

Verfahren zur UEbertragung von Zifferinformationen mittels tonfrequenter Zeichen

Info

Publication number
DE1487640A1
DE1487640A1 DE19661487640 DE1487640A DE1487640A1 DE 1487640 A1 DE1487640 A1 DE 1487640A1 DE 19661487640 DE19661487640 DE 19661487640 DE 1487640 A DE1487640 A DE 1487640A DE 1487640 A1 DE1487640 A1 DE 1487640A1
Authority
DE
Germany
Prior art keywords
frequency
character
shift register
transmission
time
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.)
Pending
Application number
DE19661487640
Other languages
German (de)
English (en)
Inventor
George Menicou
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.)
International Standard Electric Corp
Original Assignee
International 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 International Standard Electric Corp filed Critical International Standard Electric Corp
Publication of DE1487640A1 publication Critical patent/DE1487640A1/de
Pending 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
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/10—Frequency-modulated carrier systems, i.e. using frequency-shift keying
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements
    • H04Q3/0016—Arrangements providing connection between exchanges

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
  • Time-Division Multiplex Systems (AREA)
DE19661487640 1965-11-02 1966-10-28 Verfahren zur UEbertragung von Zifferinformationen mittels tonfrequenter Zeichen Pending DE1487640A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB46285/65A GB1066909A (en) 1965-11-02 1965-11-02 Improvements in or relating to electrical signalling systems

Publications (1)

Publication Number Publication Date
DE1487640A1 true DE1487640A1 (de) 1969-01-09

Family

ID=10440614

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19661487640 Pending DE1487640A1 (de) 1965-11-02 1966-10-28 Verfahren zur UEbertragung von Zifferinformationen mittels tonfrequenter Zeichen

Country Status (5)

Country Link
US (1) US3510592A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
DE (1) DE1487640A1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
FR (1) FR1502996A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
GB (1) GB1066909A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
NL (1) NL6615479A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2160038B2 (en) † 2008-07-16 2015-04-15 Tunstall Group Limited Tone Signalling

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3763322A (en) * 1971-10-01 1973-10-02 Integrated Systems Technology Digital-to-tone converter utilizing a relaxation oscillator
US4577333A (en) * 1984-09-13 1986-03-18 Gridcomm Inc. Composite shift keying communication system
GB2173675A (en) * 1985-03-22 1986-10-15 Steven Henry Lerman Communication system

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2947814A (en) * 1957-12-27 1960-08-02 Gen Railway Signal Co Carrier transmitter
US3121197A (en) * 1960-03-08 1964-02-11 Bell Telephone Labor Inc Voice-frequency binary data transmission system with return signal
US3268862A (en) * 1961-10-02 1966-08-23 Gen Signal Corp Code communication system
GB1026161A (en) * 1962-01-03 1966-04-14 Plessey Co Ltd Improvements in or relating to frequency-shift digital transmission systems
US3261922A (en) * 1962-12-28 1966-07-19 Bell Telephone Labor Inc Fdm data trunking system having a common tdm supervisory channel

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2160038B2 (en) † 2008-07-16 2015-04-15 Tunstall Group Limited Tone Signalling

Also Published As

Publication number Publication date
GB1066909A (en) 1967-04-26
FR1502996A (fr) 1967-11-24
US3510592A (en) 1970-05-05
NL6615479A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1967-05-03

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