NL273286A - - Google Patents

Info

Publication number
NL273286A
NL273286A NL273286DA NL273286A NL 273286 A NL273286 A NL 273286A NL 273286D A NL273286D A NL 273286DA NL 273286 A NL273286 A NL 273286A
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 NL273286A publication Critical patent/NL273286A/xx

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements
    • 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
    • H04Q1/4535—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 with an additional signal transmitted for voice protection

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Monitoring And Testing Of Exchanges (AREA)
  • Telephonic Communication Services (AREA)
NL273286D 1961-01-07 NL273286A (xx)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEST17314A DE1131753B (de) 1961-01-07 1961-01-07 Tonfrequentes Code-Tastwahl-Verfahren mit sprachgeschuetzten Empfaengern in Fernsprechanlagen

Publications (1)

Publication Number Publication Date
NL273286A true NL273286A (xx)

Family

ID=7457427

Family Applications (1)

Application Number Title Priority Date Filing Date
NL273286D NL273286A (xx) 1961-01-07

Country Status (5)

Country Link
US (1) US3209076A (xx)
BE (1) BE612368A (xx)
CH (1) CH402085A (xx)
DE (1) DE1131753B (xx)
NL (1) NL273286A (xx)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL292228A (xx) * 1962-05-21
DE1290563B (de) * 1963-07-16 1969-03-13 Siemens Ag Schaltungsanordnung fuer Fernmeldeanlagen mit einem asynchronen Kombinationsvielfach
US3800096A (en) * 1972-09-08 1974-03-26 Scott D Tone data receiver
DE2537672C2 (de) * 1975-08-23 1983-07-07 Standard Elektrik Lorenz Ag, 7000 Stuttgart Schaltungsanordnung für eine Pegelprüfeinrichtung zur Verwendung in selektiven Zeichenempfängern, insbesondere für Fernsprechanlagen
DE2537596C2 (de) * 1975-08-23 1983-12-15 Standard Elektrik Lorenz Ag, 7000 Stuttgart Schaltungsanordnung für eine Pegelprüfeinrichtung zur Verwendung in selektiven Zeichenempfängern, insbesondere für Fernsprechanlagen

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE434364A (xx) * 1938-05-16
BE476038A (xx) * 1944-12-26
GB854375A (en) * 1958-06-20 1960-11-16 Western Electric Co Improvements in or relating to signalling systems
US3076059A (en) * 1958-06-20 1963-01-29 Bell Telephone Labor Inc Signaling system
US3057964A (en) * 1959-12-14 1962-10-09 Bell Telephone Labor Inc Multifrequency signaling receiver
NL267564A (xx) * 1960-08-22

Also Published As

Publication number Publication date
CH402085A (de) 1965-11-15
US3209076A (en) 1965-09-28
BE612368A (nl) 1962-07-09
DE1131753B (de) 1962-06-20

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