ES453636A1 - Un dispositivo para un receptor de senal de multifrecuencia digital. - Google Patents

Un dispositivo para un receptor de senal de multifrecuencia digital.

Info

Publication number
ES453636A1
ES453636A1 ES453636A ES453636A ES453636A1 ES 453636 A1 ES453636 A1 ES 453636A1 ES 453636 A ES453636 A ES 453636A ES 453636 A ES453636 A ES 453636A ES 453636 A1 ES453636 A1 ES 453636A1
Authority
ES
Spain
Prior art keywords
frequencies
group
signal
digital
signal receiver
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
ES453636A
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 ES453636A1 publication Critical patent/ES453636A1/es
Expired 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
  • Telephone Function (AREA)
  • Electronic Switches (AREA)
  • Monitoring And Testing Of Transmission In General (AREA)
  • Monitoring And Testing Of Exchanges (AREA)
ES453636A 1975-11-27 1976-11-25 Un dispositivo para un receptor de senal de multifrecuencia digital. Expired ES453636A1 (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2553258A DE2553258C3 (de) 1975-11-27 1975-11-27 Schaltungsanordnung für einen digitalen Mehrfrequenz-Zeichenempfänger

Publications (1)

Publication Number Publication Date
ES453636A1 true ES453636A1 (es) 1977-11-16

Family

ID=5962770

Family Applications (1)

Application Number Title Priority Date Filing Date
ES453636A Expired ES453636A1 (es) 1975-11-27 1976-11-25 Un dispositivo para un receptor de senal de multifrecuencia digital.

Country Status (8)

Country Link
BE (1) BE848776R (enExample)
CA (1) CA1078980A (enExample)
CH (1) CH601955A5 (enExample)
DE (1) DE2553258C3 (enExample)
ES (1) ES453636A1 (enExample)
FR (1) FR2333398A1 (enExample)
GB (1) GB1545254A (enExample)
ZA (1) ZA766727B (enExample)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL7903346A (nl) * 1979-04-27 1980-10-29 Bell Telephone Mfg Digitaal signaleringsstelsel.

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3912869A (en) * 1973-11-21 1975-10-14 Tel Tone Corp Multifrequency-to-digital converter

Also Published As

Publication number Publication date
GB1545254A (en) 1979-05-02
ZA766727B (en) 1977-10-26
DE2553258C3 (de) 1980-07-03
FR2333398B1 (enExample) 1982-10-22
DE2553258B2 (de) 1979-10-25
BE848776R (fr) 1977-05-26
CA1078980A (en) 1980-06-03
CH601955A5 (enExample) 1978-07-14
DE2553258A1 (de) 1977-06-02
FR2333398A1 (fr) 1977-06-24

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Legal Events

Date Code Title Description
FD1A Patent lapsed

Effective date: 19970612