BE582408A - Appareil d'appel pour abonné. - Google Patents
Appareil d'appel pour abonné.Info
- Publication number
- BE582408A BE582408A BE582408A BE582408A BE582408A BE 582408 A BE582408 A BE 582408A BE 582408 A BE582408 A BE 582408A BE 582408 A BE582408 A BE 582408A BE 582408 A BE582408 A BE 582408A
- Authority
- BE
- Belgium
- Prior art keywords
- calling device
- subscriber calling
- subscriber
- calling
- 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
-
- 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
- H04M1/50—Devices which can set up and transmit only one digit at a time by generating or selecting currents of predetermined frequencies or combinations of frequencies
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Devices For Supply Of Signal Current (AREA)
- Selective Calling Equipment (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US759474A US3184554A (en) | 1958-09-08 | 1958-09-08 | Subscriber calling apparatus |
Publications (1)
Publication Number | Publication Date |
---|---|
BE582408A true BE582408A (fr) | 1960-12-31 |
Family
ID=25055784
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
BE582408A BE582408A (fr) | 1958-09-08 | 1959-09-07 | Appareil d'appel pour abonné. |
Country Status (7)
Country | Link |
---|---|
US (1) | US3184554A (fr) |
JP (1) | JPS3619851B1 (fr) |
BE (1) | BE582408A (fr) |
DE (1) | DE1109215B (fr) |
FR (1) | FR1233409A (fr) |
GB (1) | GB873189A (fr) |
NL (1) | NL242923A (fr) |
Families Citing this family (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3248722A (en) * | 1961-02-21 | 1966-04-26 | Hood Gust & Irish | Frequency keyed transistor oscillator signal receiver |
US3281541A (en) * | 1963-05-13 | 1966-10-25 | Leonard R Learner | Touch sensitive telephone calling apparatus |
DE1185665B (de) * | 1963-09-14 | 1965-01-21 | Standard Elektrik Lorenz Ag | Tastengesteuerter Mehrfrequenz-Tongenerator |
US3284577A (en) * | 1963-10-10 | 1966-11-08 | Substation apparatus employing a multi- frequency signaling arrangement | |
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 |
CA792305A (en) * | 1964-12-03 | 1968-08-13 | N.V. Philips Gloeilampenfabrieken | Transmitting arrangement for use in tone frequency pushbutton selection systems |
US3381276A (en) * | 1965-09-15 | 1968-04-30 | Photo Magnetic Syst Inc | Computer systems |
CH430809A (de) * | 1965-10-27 | 1967-02-28 | Siemens Ag Albis | Sendeeinrichtung für Mehrfrequenz-Codewahl |
DE1487960C3 (de) * | 1966-01-28 | 1973-11-22 | Standard Elektrik Lorenz Ag, 7000 Stuttgart | Tastengesteuerter Zweifrequenz Tongenerator fur die Wahlkennzeichen gäbe in Fernmelde , insbesondere Fern sprechvermittlungsanlagen |
US3521005A (en) * | 1966-09-01 | 1970-07-21 | Bell Telephone Labor Inc | Multifrequency signal generator |
FR1543779A (fr) * | 1966-12-23 | Ibm | Dispositif engendrant un son | |
US3891802A (en) * | 1969-02-12 | 1975-06-24 | Northeast Electronics Corp | Apparatus and method for augmenting a telephone network |
US3665489A (en) * | 1969-06-06 | 1972-05-23 | Ericsson Telefon Ab L M | Telephone instrument for voice frequency choice of number |
US3688050A (en) * | 1970-10-26 | 1972-08-29 | Stromberg Carlson Corp | Telephone set identification system using reverse polarity interrogation signal |
US3784759A (en) * | 1972-04-17 | 1974-01-08 | Bell Canada Northern Electric | Telephone substation apparatus |
US3899638A (en) * | 1973-10-29 | 1975-08-12 | Interface Technology Inc | Portable tone data transmitter |
DE2606720C2 (de) * | 1976-02-19 | 1984-04-26 | Siemens AG, 1000 Berlin und 8000 München | Schaltungsanordnung für Teilnehmerstationen mit tonfrequenten Tastatur-Wähleinrichtungen in Fernmelde-, insbesondere Fernsprechanlagen |
DE2606794C2 (de) * | 1976-02-19 | 1984-12-13 | Siemens AG, 1000 Berlin und 8000 München | Schaltungsanordnung für Teilnehmerstationen mit Tastatur in Fernmelde- insbesondere Fernsprechanlagen |
US5993089A (en) * | 1997-02-03 | 1999-11-30 | Burrell, Iv; James William | 8-bit binary code for use as an 8-dot braille arrangement and data entry system and method for 8-key chordic binary keyboards |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1013708B (de) * | 1955-12-22 | 1957-08-14 | Siemens Ag | Schaltungsanordnung zum Empfang von Signalspannungen |
DE1016769B (de) * | 1956-09-19 | 1957-10-03 | Standard Elektrik Ag | Schaltungsanordnung in einer Empfangseinrichtung fuer Signale nach dem Frequenzcodesystem |
-
0
- NL NL242923D patent/NL242923A/xx unknown
-
1958
- 1958-09-08 US US759474A patent/US3184554A/en not_active Expired - Lifetime
-
1959
- 1959-08-20 DE DEW26239A patent/DE1109215B/de active Pending
- 1959-08-24 FR FR803419A patent/FR1233409A/fr not_active Expired
- 1959-08-25 GB GB29043/59A patent/GB873189A/en not_active Expired
- 1959-09-07 BE BE582408A patent/BE582408A/fr unknown
- 1959-09-08 JP JP2840959A patent/JPS3619851B1/ja active Pending
Also Published As
Publication number | Publication date |
---|---|
US3184554A (en) | 1965-05-18 |
JPS3619851B1 (fr) | 1961-10-20 |
GB873189A (en) | 1961-07-19 |
NL242923A (fr) | |
DE1109215B (de) | 1961-06-22 |
FR1233409A (fr) | 1960-10-12 |
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