FR2282198B1 - - Google Patents
Info
- Publication number
- FR2282198B1 FR2282198B1 FR7427904A FR7427904A FR2282198B1 FR 2282198 B1 FR2282198 B1 FR 2282198B1 FR 7427904 A FR7427904 A FR 7427904A FR 7427904 A FR7427904 A FR 7427904A FR 2282198 B1 FR2282198 B1 FR 2282198B1
- 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
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- 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
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- 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
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Devices For Supply Of Signal Current (AREA)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7427904A FR2282198A1 (en) | 1974-08-12 | 1974-08-12 | Keyboard telephone for long lines - uses speech loop current to power MOS circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7427904A FR2282198A1 (en) | 1974-08-12 | 1974-08-12 | Keyboard telephone for long lines - uses speech loop current to power MOS circuit |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2282198A1 FR2282198A1 (en) | 1976-03-12 |
FR2282198B1 true FR2282198B1 (en) | 1978-01-27 |
Family
ID=9142339
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR7427904A Granted FR2282198A1 (en) | 1974-08-12 | 1974-08-12 | Keyboard telephone for long lines - uses speech loop current to power MOS circuit |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR2282198A1 (en) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2064268B (en) * | 1979-09-17 | 1983-10-26 | Philips Nv | Electronic signalling device for connection to a signal transmission line |
FR2466152A1 (en) * | 1979-09-20 | 1981-03-27 | Int Standard Electric Corp | Subscriber line connection adaptor - procures power for accessory unit and has constant current and voltage limiter elements |
FR2517150A1 (en) * | 1981-11-20 | 1983-05-27 | Thomson Csf Mat Tel | MICROPROCESSOR MANAGED MICROPROCESSOR CIRCUIT WITH INTEGRATED 2-WIRE 4-WIRE TRANSMISSION CIRCUIT AND CURRENT LINE BACKUP POWER SUPPLY |
FR2534755A1 (en) * | 1982-10-15 | 1984-04-20 | Telephonie Ind Commerciale | Input interface for telephone set. |
FR2556909B1 (en) * | 1983-12-14 | 1986-04-18 | Radiotechnique Compelec | INTERFACE DEVICE FOR A TELEPHONE SET |
EP0169584A1 (en) * | 1984-02-08 | 1986-01-29 | Patentverwertungs GmbH Lange & Partner | Circuit for electrically powering devices in a subscriber set |
DE3513625A1 (en) * | 1985-04-16 | 1986-10-23 | Nixdorf Computer Ag, 4790 Paderborn | CIRCUIT ARRANGEMENT FOR THE REMOTE POWER SUPPLY OF SUBSCRIBER TERMINALS IN TELECOMMUNICATION SYSTEMS |
DE3628996A1 (en) * | 1986-08-26 | 1988-03-10 | Krone Ag | CIRCUIT ARRANGEMENT FOR A TELEPHONE |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1298449A (en) * | 1970-02-12 | 1972-12-06 | Gen Electric Company Ltd Forme | Improvements in or relating to telephone instruments |
CH544461A (en) * | 1972-06-29 | 1973-11-15 | Autophon Ag | Telephone subscriber station for generating series of pulses preselected using a keyboard |
DE2258839B2 (en) * | 1972-12-01 | 1974-12-12 | Bosse Telefonbau Gmbh, 1000 Berlin | Circuit arrangement for generating serial direct current pulses on communication lines |
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1974
- 1974-08-12 FR FR7427904A patent/FR2282198A1/en active Granted
Also Published As
Publication number | Publication date |
---|---|
FR2282198A1 (en) | 1976-03-12 |
Similar Documents
Legal Events
Date | Code | Title | Description |
---|---|---|---|
ST | Notification of lapse |