DE2121454A1 - - Google Patents

Info

Publication number
DE2121454A1
DE2121454A1 DE19712121454 DE2121454A DE2121454A1 DE 2121454 A1 DE2121454 A1 DE 2121454A1 DE 19712121454 DE19712121454 DE 19712121454 DE 2121454 A DE2121454 A DE 2121454A DE 2121454 A1 DE2121454 A1 DE 2121454A1
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
DE19712121454
Other languages
German (de)
Other versions
DE2121454B2 (de
DE2121454C2 (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 DE19712121454 priority Critical patent/DE2121454C2/de
Priority claimed from DE19712121454 external-priority patent/DE2121454C2/de
Publication of DE2121454A1 publication Critical patent/DE2121454A1/de
Publication of DE2121454B2 publication Critical patent/DE2121454B2/de
Application granted granted Critical
Publication of DE2121454C2 publication Critical patent/DE2121454C2/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
    • H04Q1/446—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using one signalling frequency
    • H04Q1/4465—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using one signalling frequency the same frequency being used for all signalling information, e.g. A.C. nr.9 system

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Manipulation Of Pulses (AREA)
DE19712121454 1971-04-30 Schaltungsanordnung zur Unterscheidung und Auswertung von tonfrequenten Signalen in Fernmelde-, insbesondere Fernsprechvermittlungsanlagen Expired DE2121454C2 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19712121454 DE2121454C2 (de) 1971-04-30 Schaltungsanordnung zur Unterscheidung und Auswertung von tonfrequenten Signalen in Fernmelde-, insbesondere Fernsprechvermittlungsanlagen

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19712121454 DE2121454C2 (de) 1971-04-30 Schaltungsanordnung zur Unterscheidung und Auswertung von tonfrequenten Signalen in Fernmelde-, insbesondere Fernsprechvermittlungsanlagen

Publications (3)

Publication Number Publication Date
DE2121454A1 true DE2121454A1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1972-05-25
DE2121454B2 DE2121454B2 (de) 1972-05-25
DE2121454C2 DE2121454C2 (de) 1977-10-20

Family

ID=

Also Published As

Publication number Publication date
DE2121454B2 (de) 1972-05-25

Similar Documents

Publication Publication Date Title
AR196074A1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
AU2658571A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
AU2691671A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
AU3005371A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
AU2485671A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
AU2564071A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
AU2684071A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
AU2726271A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
AU2894671A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
AU2941471A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
AU2952271A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
AU2742671A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
AU3038671A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
AU2654071A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
AU2963771A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
AU2473671A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
AU2486471A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
AU2940971A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
AU2938071A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
AU2930871A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
AU2927871A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
AU2907471A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
AU2503871A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
AU2885171A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
AU2880771A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Legal Events

Date Code Title Description
E77 Valid patent as to the heymanns-index 1977
8339 Ceased/non-payment of the annual fee