IT1087777B - Circuito di segnalazione acustica per apparecchi telefonici - Google Patents

Circuito di segnalazione acustica per apparecchi telefonici

Info

Publication number
IT1087777B
IT1087777B IT28606/77A IT2860677A IT1087777B IT 1087777 B IT1087777 B IT 1087777B IT 28606/77 A IT28606/77 A IT 28606/77A IT 2860677 A IT2860677 A IT 2860677A IT 1087777 B IT1087777 B IT 1087777B
Authority
IT
Italy
Prior art keywords
telephone devices
signaling circuit
acoustic signaling
acoustic
circuit
Prior art date
Application number
IT28606/77A
Other languages
English (en)
Italian (it)
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
Application granted granted Critical
Publication of IT1087777B publication Critical patent/IT1087777B/it

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)
  • Telephonic Communication Services (AREA)
  • Telephone Function (AREA)
  • Devices For Supply Of Signal Current (AREA)
IT28606/77A 1976-10-14 1977-10-14 Circuito di segnalazione acustica per apparecchi telefonici IT1087777B (it)

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
IT1087777B true IT1087777B (it) 1985-06-04

Family

ID=20329130

Family Applications (1)

Application Number Title Priority Date Filing Date
IT28606/77A IT1087777B (it) 1976-10-14 1977-10-14 Circuito di segnalazione acustica per apparecchi telefonici

Country Status (10)

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

Also Published As

Publication number Publication date
SE397161B (sv) 1977-10-17
NL7710303A (nl) 1978-04-18
FR2368185A1 (fr) 1978-05-12
DE2742748A1 (de) 1978-04-20
NO773519L (no) 1978-04-17
NO139716B (no) 1979-01-15
DK455577A (da) 1978-04-15
ES463052A1 (es) 1978-07-01
NO139716C (no) 1979-05-02
BE859191A (fr) 1978-01-16
CH623694A5 (en) 1981-06-15

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