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 (fr)

Applications Claiming Priority (1)

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

Publications (1)

Publication Number Publication Date
BE512760A true BE512760A (fr)

Family

ID=20315551

Family Applications (1)

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

Country Status (5)

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

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
NL201110A (fr) * 1954-10-25
DE1050835B (fr) * 1957-03-14 1959-02-19
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 (fr) * 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
FR1066199A (fr) 1954-06-02
DE932502C (de) 1955-09-01

Similar Documents

Publication Publication Date Title
AT195616B (fr)
AT197970B (fr)
AT192177A (fr)
BE514227A (fr)
BE516396A (fr)
BE16335A (fr)
BE422752A (fr)
BE466790A (fr)
BE477312A (fr)
BE480026A (fr)
BE491015A (fr)
BE491096A (fr)
BE494945A (fr)
BE498467A (fr)
BE498982A (fr)
BE500297A (fr)
BE500588A (fr)
BE500688A (fr)
BE500744A (fr)
BE500745A (fr)
BE500841A (fr)
BE500989A (fr)
BE500995A (fr)
BE500996A (fr)
BE501021A (fr)