DE2145955A1 - - Google Patents

Info

Publication number
DE2145955A1
DE2145955A1 DE19712145955 DE2145955A DE2145955A1 DE 2145955 A1 DE2145955 A1 DE 2145955A1 DE 19712145955 DE19712145955 DE 19712145955 DE 2145955 A DE2145955 A DE 2145955A DE 2145955 A1 DE2145955 A1 DE 2145955A1
Authority
DE
Germany
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.)
Granted
Application number
DE19712145955
Other languages
German (de)
Other versions
DE2145955B1 (de
DE2145955C (de
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 DE19712145955 priority Critical patent/DE2145955C/de
Priority claimed from DE19712145955 external-priority patent/DE2145955C/de
Publication of DE2145955B1 publication Critical patent/DE2145955B1/de
Publication of DE2145955A1 publication Critical patent/DE2145955A1/de
Application granted granted Critical
Publication of DE2145955C publication Critical patent/DE2145955C/de
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)
  • Measuring Frequencies, Analyzing Spectra (AREA)
DE19712145955 1971-09-14 Sprachgeschützter frequenzselektiver Zeichenempfänger für Fernmelde-, insbesondere Fernsprechanlagen Expired DE2145955C (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19712145955 DE2145955C (de) 1971-09-14 Sprachgeschützter frequenzselektiver Zeichenempfänger für Fernmelde-, insbesondere Fernsprechanlagen

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19712145955 DE2145955C (de) 1971-09-14 Sprachgeschützter frequenzselektiver Zeichenempfänger für Fernmelde-, insbesondere Fernsprechanlagen

Publications (3)

Publication Number Publication Date
DE2145955B1 DE2145955B1 (de) 1973-01-04
DE2145955A1 true DE2145955A1 (enExample) 1973-01-04
DE2145955C DE2145955C (de) 1973-07-26

Family

ID=

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4061885A (en) * 1975-12-17 1977-12-06 Motorola, Inc. Digital tone decoder

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4061885A (en) * 1975-12-17 1977-12-06 Motorola, Inc. Digital tone decoder

Also Published As

Publication number Publication date
DE2145955B1 (de) 1973-01-04

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Legal Events

Date Code Title Description
E77 Valid patent as to the heymanns-index 1977
8340 Patent of addition ceased/non-payment of fee of main patent