FR2180901B1 - - Google Patents

Info

Publication number
FR2180901B1
FR2180901B1 FR7313951A FR7313951A FR2180901B1 FR 2180901 B1 FR2180901 B1 FR 2180901B1 FR 7313951 A FR7313951 A FR 7313951A FR 7313951 A FR7313951 A FR 7313951A FR 2180901 B1 FR2180901 B1 FR 2180901B1
Authority
FR
France
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.)
Expired
Application number
FR7313951A
Other languages
French (fr)
Other versions
FR2180901A1 (de
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.)
Nederlanden Staat
Original Assignee
Nederlanden Staat
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 Nederlanden Staat filed Critical Nederlanden Staat
Publication of FR2180901A1 publication Critical patent/FR2180901A1/fr
Application granted granted Critical
Publication of FR2180901B1 publication Critical patent/FR2180901B1/fr
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J3/00—Time-division multiplex systems
    • H04J3/02—Details
    • H04J3/12—Arrangements providing for calling or supervisory signals
    • 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)
  • Signal Processing (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
FR7313951A 1972-04-17 1973-04-17 Expired FR2180901B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL7205132A NL154386B (nl) 1972-04-17 1972-04-17 Signaleringsstelsel.

Publications (2)

Publication Number Publication Date
FR2180901A1 FR2180901A1 (de) 1973-11-30
FR2180901B1 true FR2180901B1 (de) 1979-03-30

Family

ID=19815859

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7313951A Expired FR2180901B1 (de) 1972-04-17 1973-04-17

Country Status (5)

Country Link
DE (1) DE2318172C3 (de)
FR (1) FR2180901B1 (de)
IT (1) IT980245B (de)
NL (1) NL154386B (de)
SE (1) SE380701B (de)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL177169B (nl) * 1978-09-08 1985-03-01 Nederlanden Staat Inrichting om de aanwezigheid vast te stellen van een of meer van een aantal frequenties in pulscode-gemoduleerde signalen.
AT374325B (de) * 1980-04-18 1984-04-10 Siemens Ag Oesterreich Einrichtung zur erzeugung zweier zu ueberlagernder elektrischer schwingungen unterschiedlicher frequenzen, insbesondere zur erzeugung von codezeichen fuer mehrfrequenzcodewahl
US4620294A (en) * 1983-09-09 1986-10-28 Cts Corporation Digital signal processor modem
US4599583A (en) * 1983-11-19 1986-07-08 Fujitsu Limited Mixed dual frequency generating system
DE4408323C2 (de) * 1994-03-11 1999-03-11 Siemens Ag Verfahren zur Erzeugung eines digitalen Sinussignales mit einer vorgegebenen Abtastrate und Schaltungsanordnung zur Durchführung des Verfahrens

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL267387A (de) * 1960-08-23

Also Published As

Publication number Publication date
IT980245B (it) 1974-09-30
NL154386B (nl) 1977-08-15
DE2318172C3 (de) 1975-09-25
NL7205132A (de) 1973-10-19
DE2318172A1 (de) 1973-10-25
DE2318172B2 (de) 1975-02-20
SE380701B (sv) 1975-11-10
FR2180901A1 (de) 1973-11-30

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Legal Events

Date Code Title Description
ST Notification of lapse