FR2400808B1 - - Google Patents
Info
- Publication number
- FR2400808B1 FR2400808B1 FR7823753A FR7823753A FR2400808B1 FR 2400808 B1 FR2400808 B1 FR 2400808B1 FR 7823753 A FR7823753 A FR 7823753A FR 7823753 A FR7823753 A FR 7823753A FR 2400808 B1 FR2400808 B1 FR 2400808B1
- Authority
- FR
- France
- Legal status (The legal status 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 status listed.)
- Expired
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
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Devices For Supply Of Signal Current (AREA)
- Sub-Exchange Stations And Push- Button Telephones (AREA)
- Monitoring And Testing Of Exchanges (AREA)
- Structure Of Telephone Exchanges (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE2737543A DE2737543C3 (de) | 1977-08-19 | 1977-08-19 | Verfahren zur Rufstromversorgung in Fernmelde-, insbesondere Fernsprechvermittlungs anlagen |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| FR2400808A1 FR2400808A1 (fr) | 1979-03-16 |
| FR2400808B1 true FR2400808B1 (it) | 1982-02-12 |
Family
ID=6016855
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR7823753A Granted FR2400808A1 (fr) | 1977-08-19 | 1978-08-11 | Systeme d'alimentation en courant d'appel dans des installations de telecommunications et notamment dans des installations de telephonie, a commande centrale |
Country Status (7)
| Country | Link |
|---|---|
| CH (1) | CH637256A5 (it) |
| DE (1) | DE2737543C3 (it) |
| FR (1) | FR2400808A1 (it) |
| GB (1) | GB1560204A (it) |
| IT (1) | IT1098032B (it) |
| NL (1) | NL7807112A (it) |
| SE (1) | SE7808777L (it) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1068748C (zh) * | 1996-02-07 | 2001-07-18 | 汇众实业总公司 | 程控交换机铃流电源 |
| CN100546327C (zh) * | 2005-12-21 | 2009-09-30 | 华为技术有限公司 | 一种在通讯设备中的铃流控制方法及装置 |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3601551A (en) * | 1968-07-31 | 1971-08-24 | Gte Automatic Electric Lab Inc | Tone generator control circuit |
| US3581020A (en) * | 1969-08-22 | 1971-05-25 | Itt | Ringing tone distribution circuits |
-
1977
- 1977-08-19 DE DE2737543A patent/DE2737543C3/de not_active Expired
-
1978
- 1978-05-22 GB GB21101/78A patent/GB1560204A/en not_active Expired
- 1978-06-30 NL NL7807112A patent/NL7807112A/xx unknown
- 1978-08-11 CH CH854778A patent/CH637256A5/de not_active IP Right Cessation
- 1978-08-11 FR FR7823753A patent/FR2400808A1/fr active Granted
- 1978-08-11 IT IT26709/78A patent/IT1098032B/it active
- 1978-08-18 SE SE7808777A patent/SE7808777L/xx unknown
Also Published As
| Publication number | Publication date |
|---|---|
| IT1098032B (it) | 1985-08-31 |
| NL7807112A (nl) | 1979-02-21 |
| DE2737543C3 (de) | 1980-05-29 |
| CH637256A5 (en) | 1983-07-15 |
| IT7826709A0 (it) | 1978-08-11 |
| SE7808777L (sv) | 1979-02-20 |
| DE2737543B2 (de) | 1979-09-13 |
| GB1560204A (en) | 1980-01-30 |
| FR2400808A1 (fr) | 1979-03-16 |
| DE2737543A1 (de) | 1979-02-22 |
Similar Documents
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| ST | Notification of lapse |