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NL6706645A - - Google Patents

Info

Publication number
NL6706645A
NL6706645A NL6706645A NL6706645A NL6706645A NL 6706645 A NL6706645 A NL 6706645A NL 6706645 A NL6706645 A NL 6706645A NL 6706645 A NL6706645 A NL 6706645A NL 6706645 A NL6706645 A NL 6706645A
Authority
NL
Netherlands
Application number
NL6706645A
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
Publication of NL6706645A publication Critical patent/NL6706645A/xx

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
    • H04Q1/453—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

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Amplifiers (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
  • Electronic Switches (AREA)
  • Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
  • Monitoring And Testing Of Transmission In General (AREA)
NL6706645A 1966-05-12 1967-05-12 NL6706645A (xx)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEST025382 1966-05-12

Publications (1)

Publication Number Publication Date
NL6706645A true NL6706645A (xx) 1967-11-13

Family

ID=7460525

Family Applications (1)

Application Number Title Priority Date Filing Date
NL6706645A NL6706645A (xx) 1966-05-12 1967-05-12

Country Status (7)

Country Link
US (1) US3501703A (xx)
AT (1) AT299329B (xx)
BE (1) BE698389A (xx)
DE (1) DE1487973B2 (xx)
GB (1) GB1189164A (xx)
NL (1) NL6706645A (xx)
NO (1) NO122318B (xx)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE388100B (sv) * 1975-10-03 1976-09-20 Ericsson Telefon Ab L M Anordning for detektering av en tonsignal med bestemd frekvens
SE397763B (sv) * 1976-03-09 1977-11-14 Ericsson Telefon Ab L M Mottagaranordning for storningskenslig detektering av atminstone tva tonfrekvenser i en inkommande tonsignal
US5410541A (en) * 1992-05-04 1995-04-25 Ivon International, Inc. System for simultaneous analog and digital communications over an analog channel

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE431048A (xx) * 1937-11-12
US2319306A (en) * 1941-10-31 1943-05-18 Bell Telephone Labor Inc Signaling system
FR996042A (fr) * 1945-04-14 1951-12-12 Perfectionnement aux signaleurs d'impulsions
FR928242A (fr) * 1946-05-18 1947-11-21 Materiel Telephonique Systèmes de signalisation électrique
DE1146137B (de) * 1961-11-16 1963-03-28 Standard Elektrik Lorenz Ag Tonfrequenzsignalempfaenger mit Sprachsperre

Also Published As

Publication number Publication date
NO122318B (xx) 1971-06-14
DE1487973A1 (de) 1969-03-20
DE1487973B2 (de) 1970-10-08
AT299329B (de) 1972-06-12
BE698389A (xx) 1967-11-13
GB1189164A (en) 1970-04-22
US3501703A (en) 1970-03-17

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