BE622412A - - Google Patents

Info

Publication number
BE622412A
BE622412A BE622412DA BE622412A BE 622412 A BE622412 A BE 622412A BE 622412D A BE622412D A BE 622412DA BE 622412 A BE622412 A BE 622412A
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 BE622412A publication Critical patent/BE622412A/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
    • 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
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/60—Substation equipment, e.g. for use by subscribers including speech amplifiers

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Devices For Supply Of Signal Current (AREA)
BE622412D 1961-09-13 BE622412A (ko)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEST18317A DE1153095B (de) 1961-09-13 1961-09-13 Schaltungsanordnung fuer tonfrequenten Anruf von Fernsprechstationen mit Verstaerkern

Publications (1)

Publication Number Publication Date
BE622412A true BE622412A (ko)

Family

ID=7457803

Family Applications (1)

Application Number Title Priority Date Filing Date
BE622412D BE622412A (ko) 1961-09-13

Country Status (2)

Country Link
BE (1) BE622412A (ko)
DE (1) DE1153095B (ko)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3614324A (en) * 1970-03-06 1971-10-19 Bell Telephone Labor Inc Arrangement for using a data set carrier detector to detect incoming ringing
DE2548159C2 (de) * 1975-10-28 1983-05-11 Standard Elektrik Lorenz Ag, 7000 Stuttgart Schaltungsanordnung für den akustischen Ruf in einer Chef- und Sekretärfernsprechanlage

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL245026A (ko) * 1958-11-05
DE1108748B (de) * 1959-08-04 1961-06-15 Standard Elektrik Lorenz Ag Schaltungsanordnung fuer mit einem Transistor ausgeruestete Teilnehmerstationen
DE1108274B (de) * 1959-11-06 1961-06-08 Standard Elektrik Lorenz Ag Schaltungsanordnung fuer Handfernsprecher mit eingebautem Transistorverstaerker

Also Published As

Publication number Publication date
DE1153095B (de) 1963-08-22

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