DK455577A - ACOUSTIC SIGNAL FATHER FOR TELEPHONE DEVICES - Google Patents
ACOUSTIC SIGNAL FATHER FOR TELEPHONE DEVICESInfo
- 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
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)
- Telephonic Communication Services (AREA)
- Devices For Supply Of Signal Current (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE7611406A SE397161B (en) | 1976-10-14 | 1976-10-14 | DEVICE AT THE ACOUSTIC SIGNAL BODY IN TELEPHONE DEVICES |
Publications (1)
Publication Number | Publication Date |
---|---|
DK455577A true DK455577A (en) | 1978-04-15 |
Family
ID=20329130
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DK455577A DK455577A (en) | 1976-10-14 | 1977-10-13 | ACOUSTIC SIGNAL FATHER FOR TELEPHONE DEVICES |
Country Status (10)
Country | Link |
---|---|
BE (1) | BE859191A (en) |
CH (1) | CH623694A5 (en) |
DE (1) | DE2742748A1 (en) |
DK (1) | DK455577A (en) |
ES (1) | ES463052A1 (en) |
FR (1) | FR2368185A1 (en) |
IT (1) | IT1087777B (en) |
NL (1) | NL7710303A (en) |
NO (1) | NO139716C (en) |
SE (1) | SE397161B (en) |
-
1976
- 1976-10-14 SE SE7611406A patent/SE397161B/en not_active IP Right Cessation
-
1977
- 1977-09-20 NL NL7710303A patent/NL7710303A/en not_active Application Discontinuation
- 1977-09-22 DE DE19772742748 patent/DE2742748A1/en not_active Withdrawn
- 1977-09-29 BE BE181300A patent/BE859191A/en not_active IP Right Cessation
- 1977-10-03 FR FR7729665A patent/FR2368185A1/en not_active Withdrawn
- 1977-10-07 CH CH1228277A patent/CH623694A5/en not_active IP Right Cessation
- 1977-10-08 ES ES463052A patent/ES463052A1/en not_active Expired
- 1977-10-13 NO NO773519A patent/NO139716C/en unknown
- 1977-10-13 DK DK455577A patent/DK455577A/en unknown
- 1977-10-14 IT IT28606/77A patent/IT1087777B/en active
Also Published As
Publication number | Publication date |
---|---|
NL7710303A (en) | 1978-04-18 |
IT1087777B (en) | 1985-06-04 |
CH623694A5 (en) | 1981-06-15 |
NO139716C (en) | 1979-05-02 |
SE397161B (en) | 1977-10-17 |
ES463052A1 (en) | 1978-07-01 |
FR2368185A1 (en) | 1978-05-12 |
NO139716B (en) | 1979-01-15 |
NO773519L (en) | 1978-04-17 |
BE859191A (en) | 1978-01-16 |
DE2742748A1 (en) | 1978-04-20 |
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