BE859191A - Circuit d'appel acoustique pour appareil telephonique - Google Patents
Circuit d'appel acoustique pour appareil telephoniqueInfo
- Publication number
- BE859191A BE859191A BE181300A BE181300A BE859191A BE 859191 A BE859191 A BE 859191A BE 181300 A BE181300 A BE 181300A BE 181300 A BE181300 A BE 181300A BE 859191 A BE859191 A BE 859191A
- Authority
- BE
- Belgium
- Prior art keywords
- telephone devices
- call circuit
- acoustic call
- acoustic
- circuit
- 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)
- Devices For Supply Of Signal Current (AREA)
- Telephone Function (AREA)
- Telephonic Communication Services (AREA)
- Sub-Exchange Stations And Push- Button Telephones (AREA)
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 |
|---|---|
| BE859191A true BE859191A (fr) | 1978-01-16 |
Family
ID=20329130
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE181300A BE859191A (fr) | 1976-10-14 | 1977-09-29 | Circuit d'appel acoustique pour appareil telephonique |
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) |
-
1976
- 1976-10-14 SE SE7611406A patent/SE397161B/xx not_active IP Right Cessation
-
1977
- 1977-09-20 NL NL7710303A patent/NL7710303A/xx not_active Application Discontinuation
- 1977-09-22 DE DE19772742748 patent/DE2742748A1/de not_active Withdrawn
- 1977-09-29 BE BE181300A patent/BE859191A/xx not_active IP Right Cessation
- 1977-10-03 FR FR7729665A patent/FR2368185A1/fr not_active Withdrawn
- 1977-10-07 CH CH1228277A patent/CH623694A5/de not_active IP Right Cessation
- 1977-10-08 ES ES463052A patent/ES463052A1/es not_active Expired
- 1977-10-13 DK DK455577A patent/DK455577A/da unknown
- 1977-10-13 NO NO773519A patent/NO139716C/no unknown
- 1977-10-14 IT IT28606/77A patent/IT1087777B/it active
Also Published As
| Publication number | Publication date |
|---|---|
| CH623694A5 (en) | 1981-06-15 |
| IT1087777B (it) | 1985-06-04 |
| ES463052A1 (es) | 1978-07-01 |
| DK455577A (da) | 1978-04-15 |
| NO773519L (no) | 1978-04-17 |
| NL7710303A (nl) | 1978-04-18 |
| NO139716B (no) | 1979-01-15 |
| DE2742748A1 (de) | 1978-04-20 |
| NO139716C (no) | 1979-05-02 |
| FR2368185A1 (fr) | 1978-05-12 |
| SE397161B (sv) | 1977-10-17 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| RE | Patent lapsed |
Owner name: TELEFON-A.B. L M ERICSSON Effective date: 19850930 |