NL109525C - - Google Patents

Info

Publication number
NL109525C
NL109525C NL109525DA NL109525C NL 109525 C NL109525 C NL 109525C NL 109525D A NL109525D A NL 109525DA NL 109525 C NL109525 C NL 109525C
Authority
NL
Netherlands
Application number
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.)
Publication of NL109525C publication Critical patent/NL109525C/xx

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements
    • H04Q3/42—Circuit arrangements for indirect selecting controlled by common circuits, e.g. register controller, marker
    • 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
    • H04Q1/448—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using one signalling frequency with conversion of a single frequency signal into a digital signal

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Devices For Supply Of Signal Current (AREA)
  • Telephonic Communication Services (AREA)
  • Electronic Switches (AREA)
NL109525D 1957-03-14 NL109525C (xx)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL215380 1957-03-14

Publications (1)

Publication Number Publication Date
NL109525C true NL109525C (xx)

Family

ID=19750843

Family Applications (1)

Application Number Title Priority Date Filing Date
NL109525D NL109525C (xx) 1957-03-14

Country Status (8)

Country Link
US (1) US3008009A (xx)
JP (1) JPS3513053B1 (xx)
BE (1) BE565636A (xx)
CH (1) CH362127A (xx)
DE (1) DE1051912B (xx)
FR (1) FR1258823A (xx)
GB (1) GB887275A (xx)
NL (1) NL109525C (xx)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1090273B (de) * 1959-05-09 1960-10-06 Philips Nv Schaltungsanordnung zur Auswertung von Signalen verschiedener Frequenzen in Fernmeldeanlagen
FR81782E (xx) * 1961-06-19 1964-01-31
DE1201417B (de) * 1964-07-10 1965-09-23 Standard Elektrik Lorenz Ag Tonfrequentes Tastwahlverfahren ohne Gleichstrom-Wahlbegleitzeichen in Fernmelde-, insbesondere Fernsprechanlagen und Schaltungsanordnung zur Durchfuehrung des Verfahrens
DE2162898A1 (de) * 1971-06-22 1972-12-28 Sits Soc It Telecom Siemens Schaltungsanordnung zum Identifizieren von Gleichstromsignalen in einer Fernsprechanlage mit Tastenwahl
US3784759A (en) * 1972-04-17 1974-01-08 Bell Canada Northern Electric Telephone substation apparatus

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL100869C (xx) * 1952-05-01
US2817828A (en) * 1953-10-07 1957-12-24 Bell Telephone Labor Inc Multifrequency high speed signaling system employing pulses of signaling currents ofpredetermined duration based on orthogonal functions

Also Published As

Publication number Publication date
GB887275A (en) 1962-01-17
DE1051912B (de) 1959-03-05
BE565636A (xx)
US3008009A (en) 1961-11-07
CH362127A (de) 1962-05-31
JPS3513053B1 (xx) 1960-09-09
FR1258823A (fr) 1961-04-21

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