NL6911559A - - Google Patents

Info

Publication number
NL6911559A
NL6911559A NL6911559A NL6911559A NL6911559A NL 6911559 A NL6911559 A NL 6911559A NL 6911559 A NL6911559 A NL 6911559A NL 6911559 A NL6911559 A NL 6911559A NL 6911559 A NL6911559 A NL 6911559A
Authority
NL
Netherlands
Application number
NL6911559A
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 filed Critical
Publication of NL6911559A publication Critical patent/NL6911559A/xx

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

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Complex Calculations (AREA)
  • Interface Circuits In Exchanges (AREA)
NL6911559A 1968-07-30 1969-07-29 NL6911559A (un)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR161172 1968-07-30

Publications (1)

Publication Number Publication Date
NL6911559A true NL6911559A (un) 1970-02-03

Family

ID=8653211

Family Applications (1)

Application Number Title Priority Date Filing Date
NL6911559A NL6911559A (un) 1968-07-30 1969-07-29

Country Status (8)

Country Link
US (1) US3683162A (un)
BE (1) BE736262A (un)
CH (1) CH504823A (un)
DE (1) DE1938804C3 (un)
FR (1) FR1603175A (un)
GB (1) GB1271528A (un)
NL (1) NL6911559A (un)
SE (1) SE344527B (un)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2116224B1 (un) * 1970-10-29 1974-10-31 Ibm France
FR2164544B1 (un) * 1971-12-21 1974-09-27 Ibm France
US3732409A (en) * 1972-03-20 1973-05-08 Nasa Counting digital filters
FR2295665A1 (fr) * 1974-12-18 1976-07-16 Labo Cent Telecommunicat Recepteur numerique de signaux multifrequences
JPS5827546B2 (ja) * 1975-04-22 1983-06-10 日本電気株式会社 エンザンソウチ
DE2659512B1 (de) * 1976-12-30 1978-05-24 Wandel & Goltermann Verfahren und Schaltungsanordnung zum Erzeugen eines Digitalsignals zum Pruefen einer PCM-Endstelle
CA1111531A (en) * 1979-02-22 1981-10-27 Jackylene K. Hood Digital signalling receiver for receiving pcm tones
US4203008A (en) * 1979-02-26 1980-05-13 Northern Telecom Limited Digital signalling receiver for receiving PCM tones
US4354248A (en) * 1979-11-28 1982-10-12 Motorola, Inc. Programmable multifrequency tone receiver
FR2485843B1 (fr) * 1980-06-25 1986-11-07 Cit Alcatel Recepteur numerique de frequences
FR2512306A1 (fr) * 1981-08-27 1983-03-04 Telecommunications Sa Dispositif numerique de reconnaissance de frequences
US6140568A (en) * 1997-11-06 2000-10-31 Innovative Music Systems, Inc. System and method for automatically detecting a set of fundamental frequencies simultaneously present in an audio signal
CN112042161B (zh) * 2018-01-26 2023-09-26 加州理工学院 通过在零点上调制数据来进行通信的系统和方法
SG11202108549YA (en) 2019-02-07 2021-09-29 California Inst Of Techn Systems and methods for communicating by modulating data on zeros in the presence of channel impairments

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3099742A (en) * 1959-03-13 1963-07-30 Westinghouse Air Brake Co Digital flow computer employing a logarithmic mode of computation
US3288940A (en) * 1963-10-24 1966-11-29 Automatic Elect Lab Multifrequency signal receiver
US3404231A (en) * 1965-01-05 1968-10-01 Bell Telephone Labor Inc Framing of pulse code transmission systems by use of an added tone signal
US3521042A (en) * 1967-07-19 1970-07-21 Ibm Simplified digital filter

Also Published As

Publication number Publication date
FR1603175A (un) 1971-03-22
SE344527B (un) 1972-04-17
DE1938804B2 (de) 1979-05-23
CH504823A (fr) 1971-03-15
BE736262A (un) 1970-01-19
US3683162A (en) 1972-08-08
DE1938804C3 (de) 1980-02-21
DE1938804A1 (de) 1970-02-05
GB1271528A (en) 1972-04-19

Similar Documents

Publication Publication Date Title
AU5506869A (un)
AU5184069A (un)
FR1603175A (un)
AU6168869A (un)
AU6171569A (un)
AU4811568A (un)
AR203075Q (un)
AU4744468A (un)
BE709319A (un)
BE709095A (un)
BE727128A (un)
BE727048A (un)
BE726670A (un)
BE726334A (un)
BE725561A (un)
BE719443A (un)
BE719110A (un)
BE709496A (un)
BE709484A (un)
BE709479A (un)
BE709446A (un)
BE709435A (un)
BE709415A (un)
BE709320A (un)
BE709301A (un)

Legal Events

Date Code Title Description
DNT Communications of changes of names of applicants whose applications have been laid open to public inspection

Free format text: COMPAGNIE INDUSTRIELLE DES TELECOMMUNICATIONS CIT-ALCATEL

BN A decision not to publish the application has become irrevocable