DK455577A - Akustisk signalkfeds til telefonapparater - Google Patents

Akustisk signalkfeds til telefonapparater

Info

Publication number
DK455577A
DK455577A DK455577A DK455577A DK455577A DK 455577 A DK455577 A DK 455577A DK 455577 A DK455577 A DK 455577A DK 455577 A DK455577 A DK 455577A DK 455577 A DK455577 A DK 455577A
Authority
DK
Denmark
Prior art keywords
father
acoustic signal
telephone devices
telephone
devices
Prior art date
Application number
DK455577A
Other languages
Danish (da)
English (en)
Inventor
S E Magnusson
Original Assignee
Ericsson Telefon Ab L M
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
Application filed by Ericsson Telefon Ab L M filed Critical Ericsson Telefon Ab L M
Publication of DK455577A publication Critical patent/DK455577A/da

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

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Telephone Set Structure (AREA)
  • Sub-Exchange Stations And Push- Button Telephones (AREA)
  • Telephone Function (AREA)
  • Devices For Supply Of Signal Current (AREA)
  • Telephonic Communication Services (AREA)
DK455577A 1976-10-14 1977-10-13 Akustisk signalkfeds til telefonapparater DK455577A (da)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE7611406A SE397161B (sv) 1976-10-14 1976-10-14 Anordning vid akustiska signalorgan i telefonapparater

Publications (1)

Publication Number Publication Date
DK455577A true DK455577A (da) 1978-04-15

Family

ID=20329130

Family Applications (1)

Application Number Title Priority Date Filing Date
DK455577A DK455577A (da) 1976-10-14 1977-10-13 Akustisk signalkfeds til telefonapparater

Country Status (10)

Country Link
BE (1) BE859191A (it)
CH (1) CH623694A5 (it)
DE (1) DE2742748A1 (it)
DK (1) DK455577A (it)
ES (1) ES463052A1 (it)
FR (1) FR2368185A1 (it)
IT (1) IT1087777B (it)
NL (1) NL7710303A (it)
NO (1) NO139716C (it)
SE (1) SE397161B (it)

Also Published As

Publication number Publication date
SE397161B (sv) 1977-10-17
BE859191A (fr) 1978-01-16
NO139716B (no) 1979-01-15
IT1087777B (it) 1985-06-04
ES463052A1 (es) 1978-07-01
CH623694A5 (en) 1981-06-15
DE2742748A1 (de) 1978-04-20
NL7710303A (nl) 1978-04-18
NO773519L (no) 1978-04-17
NO139716C (no) 1979-05-02
FR2368185A1 (fr) 1978-05-12

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