NL276415A - - Google Patents

Info

Publication number
NL276415A
NL276415A NL276415DA NL276415A NL 276415 A NL276415 A NL 276415A NL 276415D A NL276415D A NL 276415DA NL 276415 A NL276415 A NL 276415A
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 NL276415A publication Critical patent/NL276415A/xx

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/26—Devices for calling a subscriber
    • H04M1/30—Devices which can set up and transmit only one digit at a time
    • H04M1/50—Devices which can set up and transmit only one digit at a time by generating or selecting currents of predetermined frequencies or combinations of frequencies
    • 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
    • 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
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Telephonic Communication Services (AREA)
  • Interconnected Communication Systems, Intercoms, And Interphones (AREA)
NL276415D 1961-03-25 NL276415A (ko)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEST17623A DE1133772B (de) 1961-03-25 1961-03-25 Verfahren und Schaltungsanordnung zur tonfrequenten Tastwahl in Fernsprechanlagen

Publications (1)

Publication Number Publication Date
NL276415A true NL276415A (ko)

Family

ID=7457540

Family Applications (1)

Application Number Title Priority Date Filing Date
NL276415D NL276415A (ko) 1961-03-25

Country Status (7)

Country Link
US (1) US3187109A (ko)
AT (1) AT238782B (ko)
BE (1) BE615459A (ko)
DE (2) DE1133772B (ko)
FR (2) FR81468E (ko)
GB (1) GB949556A (ko)
NL (1) NL276415A (ko)

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2554201A (en) * 1946-06-19 1951-05-22 Ericsson Telefon Ab L M Key-sending automatic telephone signaling system
NL73400C (ko) * 1948-02-05
US2672523A (en) * 1949-09-16 1954-03-16 Bell Telephone Labor Inc Telephone subscriber
US2701279A (en) * 1953-10-21 1955-02-01 Bell Telephone Labor Inc Multifrequency signaling system
US2717280A (en) * 1954-03-01 1955-09-06 Bell Telephone Labor Inc Signaling or dialing system
GB845375A (en) * 1957-12-10 1960-08-24 Neosid Ltd Improvements in or relating to adjustable cores
US3011028A (en) * 1958-05-07 1961-11-28 Leich Electric Co Signaling system

Also Published As

Publication number Publication date
DE1135058B (de) 1962-08-23
FR86826E (fr) 1966-04-22
BE615459A (nl) 1962-09-24
FR81468E (fr) 1963-09-27
AT238782B (de) 1965-02-25
US3187109A (en) 1965-06-01
GB949556A (en) 1964-02-12
DE1133772B (de) 1962-07-26

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