ES439668A1 - Un sistema de senalizacion entre centros de proceso de da- tos. - Google Patents

Un sistema de senalizacion entre centros de proceso de da- tos.

Info

Publication number
ES439668A1
ES439668A1 ES439668A ES439668A ES439668A1 ES 439668 A1 ES439668 A1 ES 439668A1 ES 439668 A ES439668 A ES 439668A ES 439668 A ES439668 A ES 439668A ES 439668 A1 ES439668 A1 ES 439668A1
Authority
ES
Spain
Prior art keywords
frequency
signal
signals
consisting essentially
basic
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.)
Expired
Application number
ES439668A
Other languages
English (en)
Spanish (es)
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.)
Nokia Spain SA
Original Assignee
Alcatel Espana SA
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 Alcatel Espana SA filed Critical Alcatel Espana SA
Publication of ES439668A1 publication Critical patent/ES439668A1/es
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/30—Systems using multi-frequency codes wherein each code element is represented by a combination of frequencies
    • 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
    • H04Q1/453—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using multi-frequency signalling in which m-out-of-n signalling frequencies are transmitted

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
ES439668A 1974-07-26 1975-07-23 Un sistema de senalizacion entre centros de proceso de da- tos. Expired ES439668A1 (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7426100A FR2280141A1 (fr) 1974-07-26 1974-07-26 Systeme de signalisation entre centres de traitement d'informations

Publications (1)

Publication Number Publication Date
ES439668A1 true ES439668A1 (es) 1977-03-16

Family

ID=9141787

Family Applications (1)

Application Number Title Priority Date Filing Date
ES439668A Expired ES439668A1 (es) 1974-07-26 1975-07-23 Un sistema de senalizacion entre centros de proceso de da- tos.

Country Status (2)

Country Link
ES (1) ES439668A1 (enExample)
FR (1) FR2280141A1 (enExample)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1053821A (en) * 1976-08-19 1979-05-01 Ernst A. Munter Receiver/sender for signalling between telephone switching facilities
FR2453575A1 (fr) * 1979-04-06 1980-10-31 Cit Alcatel Equipement de signalisation multifrequence a commande centralisee
ATE67636T1 (de) * 1987-02-05 1991-10-15 Alcatel Bell Sdt Sa Verfahren zur uebertragungsfehler-erkennung und - korrektur.

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3604947A (en) * 1965-10-23 1971-09-14 Aerojet General Co Variable filter device
CH472149A (de) * 1967-03-22 1969-04-30 Siemens Ag N-Pfad-Bandfilter
DE1591473B1 (de) * 1967-04-11 1971-12-09 Siemens Ag Empfaenger fuer mehrere wellenbereiche
GB1378818A (en) * 1971-08-27 1974-12-27 Rockwell International Corp Digital tone signal generator
FR2191827A5 (enExample) * 1972-06-27 1974-02-01 Socotel Mixte D Veloppem

Also Published As

Publication number Publication date
FR2280141A1 (fr) 1976-02-20
FR2280141B1 (enExample) 1978-03-31

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Legal Events

Date Code Title Description
FD1A Patent lapsed

Effective date: 19970612