FR2281019B3 - - Google Patents
Info
- Publication number
- FR2281019B3 FR2281019B3 FR7523462A FR7523462A FR2281019B3 FR 2281019 B3 FR2281019 B3 FR 2281019B3 FR 7523462 A FR7523462 A FR 7523462A FR 7523462 A FR7523462 A FR 7523462A FR 2281019 B3 FR2281019 B3 FR 2281019B3
- 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
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/26—Devices for calling a subscriber
- H04M1/30—Devices which can set up and transmit only one digit at a time
- H04M1/31—Devices which can set up and transmit only one digit at a time by interrupting current to generate trains of pulses; by periodically opening and closing contacts to generate trains of pulses
- H04M1/312—Devices which can set up and transmit only one digit at a time by interrupting current to generate trains of pulses; by periodically opening and closing contacts to generate trains of pulses pulses produced by electronic circuits
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M19/00—Current supply arrangements for telephone systems
- H04M19/08—Current supply arrangements for telephone systems with current supply sources at the substations
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Devices For Supply Of Signal Current (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3357074A GB1472442A (en) | 1974-07-30 | 1974-07-30 | Power supply circuits |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| FR2281019A1 FR2281019A1 (en) | 1976-02-27 |
| FR2281019B3 true FR2281019B3 (en) | 1979-04-27 |
Family
ID=10354661
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR7523462A Granted FR2281019A1 (en) | 1974-07-30 | 1975-07-28 | IMPROVEMENTS TO POWER SUPPLIES FOR TELEPHONE STATIONS |
Country Status (8)
| Country | Link |
|---|---|
| BE (1) | BE831828A (en) |
| FR (1) | FR2281019A1 (en) |
| GB (1) | GB1472442A (en) |
| HK (1) | HK5878A (en) |
| IE (1) | IE41644B1 (en) |
| IT (1) | IT1039852B (en) |
| NZ (1) | NZ178241A (en) |
| ZA (1) | ZA754856B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2931464C2 (en) * | 1979-08-02 | 1981-10-08 | Siemens AG, 1000 Berlin und 8000 München | Circuit arrangement for connecting a transmission device of a modem to a telephone line |
| DE2931456C2 (en) * | 1979-08-02 | 1982-10-28 | Siemens AG, 1000 Berlin und 8000 München | Parallel control circuit |
-
1974
- 1974-07-30 GB GB3357074A patent/GB1472442A/en not_active Expired
-
1975
- 1975-07-15 IT IT25407/75A patent/IT1039852B/en active
- 1975-07-28 FR FR7523462A patent/FR2281019A1/en active Granted
- 1975-07-29 NZ NZ178241A patent/NZ178241A/en unknown
- 1975-07-29 BE BE2054481A patent/BE831828A/en unknown
- 1975-07-29 IE IE1702/75A patent/IE41644B1/en unknown
- 1975-07-29 ZA ZA00754856A patent/ZA754856B/en unknown
-
1978
- 1978-01-26 HK HK58/78A patent/HK5878A/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| IE41644L (en) | 1976-01-30 |
| ZA754856B (en) | 1976-09-29 |
| NZ178241A (en) | 1978-03-06 |
| BE831828A (en) | 1976-01-29 |
| IE41644B1 (en) | 1980-02-27 |
| FR2281019A1 (en) | 1976-02-27 |
| IT1039852B (en) | 1979-12-10 |
| HK5878A (en) | 1978-02-03 |
| GB1472442A (en) | 1977-05-04 |
Similar Documents
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| ST | Notification of lapse |