SE7501531L - - Google Patents
Info
- Publication number
- SE7501531L SE7501531L SE7501531A SE7501531A SE7501531L SE 7501531 L SE7501531 L SE 7501531L SE 7501531 A SE7501531 A SE 7501531A SE 7501531 A SE7501531 A SE 7501531A SE 7501531 L SE7501531 L SE 7501531L
- Authority
- SE
- Sweden
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
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Devices For Supply Of Signal Current (AREA)
- Telephonic Communication Services (AREA)
- Nozzles For Electric Vacuum Cleaners (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR747405051A FR2270738B1 (xx) | 1974-02-14 | 1974-02-14 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| SE7501531L true SE7501531L (xx) | 1975-08-15 |
| SE398188B SE398188B (sv) | 1977-12-05 |
Family
ID=9134914
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SE7501531A SE398188B (sv) | 1974-02-14 | 1975-02-12 | Anordning vid telefonapparater innefattande en anropspulsseriegenerator och en generator for multifrekventa anropssignaler |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US3988549A (xx) |
| JP (1) | JPS50119507A (xx) |
| DE (1) | DE2506122B2 (xx) |
| FR (1) | FR2270738B1 (xx) |
| GB (1) | GB1456815A (xx) |
| NL (1) | NL7501754A (xx) |
| SE (1) | SE398188B (xx) |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4063037A (en) * | 1976-06-14 | 1977-12-13 | Rochester Telephone Corporation | Telephone metering interface with reverse signal sensor |
| US4119810A (en) * | 1976-09-13 | 1978-10-10 | Phone Devices Corporation | Pushbutton telephone apparatus with automatic dialing and combinational sequential control signalling capabilities |
| CH620559A5 (xx) * | 1977-09-12 | 1980-11-28 | Sodeco Compteurs De Geneve | |
| FR2419624A1 (fr) * | 1978-03-08 | 1979-10-05 | Roche Bernard | Poste telephonique a clavier a commutation automatique des codes de numerotation a impulsions et a multifrequence |
| AT379478B (de) * | 1978-04-15 | 1986-01-10 | Telefonbau & Normalzeit Gmbh | Schaltungsanordnung fuer teilnehmerapparate in fernsprechnebenstellenanlagen mit tonfrequenter tastwahl |
| US4203006A (en) * | 1978-04-20 | 1980-05-13 | Prentice Corporation | Direct access coupler |
| FR2471704B1 (fr) * | 1979-12-13 | 1986-06-20 | Thomson Csf Mat Tel | Dispositif d'envoi de signalisation pour postes et terminaux telephoniques |
| IT1146176B (it) * | 1980-02-07 | 1986-11-12 | Italdata Spa | Dispositivo interfacciale per la gestione automatica di una linea telefonica commutata |
| FR2566215B1 (fr) * | 1984-06-19 | 1986-10-10 | Semiconducteurs Ste Gle | Dispositif d'adaptation de clavier a emission decimale ou multifrequence sur poste telephonique |
| GB2208057A (en) * | 1987-07-27 | 1989-02-15 | Barron Mccann Limited | Telephone interface device |
| AU622744B2 (en) * | 1989-02-02 | 1992-04-16 | Alcatel Australia Limited | Dialler chip mode signal |
| US5369697A (en) * | 1993-04-30 | 1994-11-29 | Boston Technology, Inc. | Method and apparatus for automatically switching between pulse code and DTMF signals generated by a telephone |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3301957A (en) * | 1962-12-06 | 1967-01-31 | Bell Telephone Labor Inc | Unattended automatic dialing of telephone numbers |
| US3371162A (en) * | 1964-09-02 | 1968-02-27 | Scantlin Electronics Inc | System for transmitting digital data via telephone lines utilizing a telephone as the input |
| US3541262A (en) * | 1968-05-10 | 1970-11-17 | Teltronics Inc | Post pay telephone control unit |
| US3652795A (en) * | 1970-11-25 | 1972-03-28 | Electrospace Corp | Telephone transaction system |
| US3778556A (en) * | 1971-07-02 | 1973-12-11 | Telecommunications Techn Inc | Telephone signaling and testing apparatus with provisions for either pulse or multifrequency dialing |
| CA928877A (en) * | 1971-09-01 | 1973-06-19 | Nowicki Jan | Post pay telephone paystation circuit |
| US3932709A (en) * | 1973-04-16 | 1976-01-13 | General Teletronics Incorporated | Electronic business telephone |
| US3920926A (en) * | 1973-12-07 | 1975-11-18 | Northern Electric Co | Telephone data set including visual display means |
-
1974
- 1974-02-14 FR FR747405051A patent/FR2270738B1/fr not_active Expired
-
1975
- 1975-02-10 US US05/548,580 patent/US3988549A/en not_active Expired - Lifetime
- 1975-02-12 SE SE7501531A patent/SE398188B/xx unknown
- 1975-02-12 GB GB606675A patent/GB1456815A/en not_active Expired
- 1975-02-13 DE DE19752506122 patent/DE2506122B2/de active Pending
- 1975-02-14 NL NL7501754A patent/NL7501754A/xx active Search and Examination
- 1975-02-14 JP JP50019392A patent/JPS50119507A/ja active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| FR2270738B1 (xx) | 1979-02-09 |
| NL7501754A (nl) | 1975-08-18 |
| GB1456815A (en) | 1976-11-24 |
| FR2270738A1 (xx) | 1975-12-05 |
| DE2506122B2 (de) | 1976-06-24 |
| US3988549A (en) | 1976-10-26 |
| SE398188B (sv) | 1977-12-05 |
| DE2506122A1 (de) | 1975-08-21 |
| JPS50119507A (xx) | 1975-09-19 |