NL7205132A - - Google Patents

Info

Publication number
NL7205132A
NL7205132A NL7205132A NL7205132A NL7205132A NL 7205132 A NL7205132 A NL 7205132A NL 7205132 A NL7205132 A NL 7205132A NL 7205132 A NL7205132 A NL 7205132A NL 7205132 A NL7205132 A NL 7205132A
Authority
NL
Netherlands
Application number
NL7205132A
Other versions
NL154386B (nl
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
Priority to NL7205132A priority Critical patent/NL154386B/xx
Priority to DE19732318172 priority patent/DE2318172C3/de
Priority to SE7305320A priority patent/SE380701B/xx
Priority to FR7313951A priority patent/FR2180901B1/fr
Priority to IT4949273A priority patent/IT980245B/it
Publication of NL7205132A publication Critical patent/NL7205132A/xx
Publication of NL154386B publication Critical patent/NL154386B/xx

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)
NL7205132A 1972-04-17 1972-04-17 Signaleringsstelsel. NL154386B (nl)

Priority Applications (5)

Application Number Priority Date Filing Date Title
NL7205132A NL154386B (nl) 1972-04-17 1972-04-17 Signaleringsstelsel.
DE19732318172 DE2318172C3 (de) 1972-04-17 1973-04-11 Verfahren zur Erzeugung digitalisierter Codezeichen bei der Mehrfrequenzcodewahl in Fernmelde-, insbesondere Fernsprechanlagen
SE7305320A SE380701B (sv) 1972-04-17 1973-04-13 System for att digitalisera en mfc-signal.
FR7313951A FR2180901B1 (zh) 1972-04-17 1973-04-17
IT4949273A IT980245B (it) 1972-04-17 1973-04-17 Sistema di segnalazione telefonica

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
NL7205132A true NL7205132A (zh) 1973-10-19
NL154386B NL154386B (nl) 1977-08-15

Family

ID=19815859

Family Applications (1)

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

Country Status (5)

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

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 (zh) * 1960-08-23

Also Published As

Publication number Publication date
DE2318172C3 (de) 1975-09-25
NL154386B (nl) 1977-08-15
DE2318172A1 (de) 1973-10-25
IT980245B (it) 1974-09-30
SE380701B (sv) 1975-11-10
FR2180901B1 (zh) 1979-03-30
FR2180901A1 (zh) 1973-11-30
DE2318172B2 (de) 1975-02-20

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Legal Events

Date Code Title Description
V1 Lapsed because of non-payment of the annual fee
NL80 Abbreviated name of patent owner mentioned of already nullified patent

Owner name: P T T