BE646363A - - Google Patents

Info

Publication number
BE646363A
BE646363A BE646363DA BE646363A BE 646363 A BE646363 A BE 646363A BE 646363D A BE646363D A BE 646363DA BE 646363 A BE646363 A BE 646363A
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.)
Filing date
Publication date
Priority claimed from DEST20496A external-priority patent/DE1180420B/de
Application filed filed Critical
Publication of BE646363A publication Critical patent/BE646363A/xx

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M19/00—Current supply arrangements for telephone systems
    • H04M19/02—Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M19/00—Current supply arrangements for telephone systems
    • H04M19/02—Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone
    • H04M19/04—Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone the ringing-current being generated at the substations
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Devices For Supply Of Signal Current (AREA)
  • Telephonic Communication Services (AREA)
  • Telephone Function (AREA)
BE646363D 1963-04-10 1964-04-10 BE646363A (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DEST020497 1963-04-10
DEST20496A DE1180420B (de) 1963-04-10 1963-04-10 Rufverfahren fuer Fernsprechanlagen

Publications (1)

Publication Number Publication Date
BE646363A true BE646363A (de) 1964-10-12

Family

ID=25994169

Family Applications (2)

Application Number Title Priority Date Filing Date
BE646362D BE646362A (de) 1963-04-10 1964-04-10
BE646363D BE646363A (de) 1963-04-10 1964-04-10

Family Applications Before (1)

Application Number Title Priority Date Filing Date
BE646362D BE646362A (de) 1963-04-10 1964-04-10

Country Status (6)

Country Link
US (2) US3342948A (de)
BE (2) BE646362A (de)
CH (2) CH412019A (de)
DE (1) DE1437543B2 (de)
NL (2) NL6403792A (de)
SE (1) SE325615B (de)

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2338395A (en) * 1940-06-25 1944-01-04 Gen Electric Signal transmission system
US2432204A (en) * 1944-01-05 1947-12-09 Rca Corp Pulse modulation system
US3061783A (en) * 1956-04-30 1962-10-30 Lynch Carrier Systems Inc Inband signalling system
US3156775A (en) * 1959-12-02 1964-11-10 Itt Telephone converter
US3210479A (en) * 1962-08-30 1965-10-05 Automatic Elect Lab Voice-frequency selective signalling arrangement
US3240879A (en) * 1962-12-18 1966-03-15 Bell Telephone Labor Inc Alarm circuits in portable radio telephone system

Also Published As

Publication number Publication date
US3342948A (en) 1967-09-19
DE1437543B2 (de) 1971-10-14
DE1437543A1 (de) 1970-07-23
US3349185A (en) 1967-10-24
NL6403792A (de) 1964-10-12
BE646362A (de) 1964-10-12
CH406324A (de) 1966-01-31
SE325615B (de) 1970-07-06
NL6403791A (de) 1964-10-12
CH412019A (de) 1966-04-30

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