BE512760A - - Google Patents

Info

Publication number
BE512760A
BE512760A BE512760DA BE512760A BE 512760 A BE512760 A BE 512760A BE 512760D A BE512760D A BE 512760DA BE 512760 A BE512760 A BE 512760A
Authority
BE
Belgium
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 BE512760A publication Critical patent/BE512760A/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

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Devices For Supply Of Signal Current (AREA)
  • Meter Arrangements (AREA)
BE512760D 1951-07-13 BE512760A (lv)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE704650X 1951-07-13

Publications (1)

Publication Number Publication Date
BE512760A true BE512760A (lv)

Family

ID=20315551

Family Applications (1)

Application Number Title Priority Date Filing Date
BE512760D BE512760A (lv) 1951-07-13

Country Status (5)

Country Link
US (1) US2732432A (lv)
BE (1) BE512760A (lv)
DE (1) DE932502C (lv)
FR (1) FR1066199A (lv)
GB (1) GB704650A (lv)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE975971C (de) * 1955-04-05 1962-12-27 Angelika Kunckel Tragbarer Fernsprechapparat mit Ortsbatterie

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL96910C (lv) * 1954-10-25
NL100359C (lv) * 1957-03-14
US3045069A (en) * 1957-05-09 1962-07-17 Dictaphone Corp Remote control system
GB852198A (en) * 1957-11-06 1960-10-26 Ericsson Telefon Ab L M Improvements in or relating to apparatus for sending signals indicative of the values of coins inserted into a coin operated telephone instrument, to a control device inan automatic telephone exchange
US3060275A (en) * 1958-11-07 1962-10-23 Bell Telephone Labor Inc Telephone system signaling
DE1128472B (de) * 1960-10-12 1962-04-26 Siemens Ag Schaltungsanordnung fuer Teilnehmerstellen, insbesondere an Gesellschaftsleitungen, in Fernmelde-, insbesondere Fernsprech-anlagen, zur Anwendung von tonfrequenten Kennzeichen

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR959688A (lv) * 1950-03-31
GB418004A (en) * 1933-04-21 1934-10-17 Gen Electric Co Ltd Improvements in or relating to telephone systems
US2228113A (en) * 1937-11-05 1941-01-07 Bell Telephone Labor Inc Selective system
US2317191A (en) * 1941-01-24 1943-04-20 Bell Telephone Labor Inc Telephone system
US2554201A (en) * 1946-06-19 1951-05-22 Ericsson Telefon Ab L M Key-sending automatic telephone signaling system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE975971C (de) * 1955-04-05 1962-12-27 Angelika Kunckel Tragbarer Fernsprechapparat mit Ortsbatterie

Also Published As

Publication number Publication date
GB704650A (en) 1954-02-24
US2732432A (en) 1956-01-24
DE932502C (de) 1955-09-01
FR1066199A (fr) 1954-06-02

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