BE565637A - - Google Patents
Info
- Publication number
- BE565637A BE565637A BE565637DA BE565637A BE 565637 A BE565637 A BE 565637A BE 565637D A BE565637D A BE 565637DA BE 565637 A BE565637 A BE 565637A
- Authority
- BE
- Belgium
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
- H04M1/50—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
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/10—Frequency-modulated carrier systems, i.e. using frequency-shift keying
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q3/00—Selecting arrangements
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Interface Circuits In Exchanges (AREA)
- Telephonic Communication Services (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL215381 | 1957-03-14 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE565637A true BE565637A (US07923587-20110412-C00022.png) |
Family
ID=19750844
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE565637D BE565637A (US07923587-20110412-C00022.png) | 1957-03-14 |
Country Status (6)
Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH379584A (de) * | 1958-09-03 | 1964-07-15 | Standard Telephon & Radio Ag | Elektrische Signalisier-Einrichtung |
| US3060275A (en) * | 1958-11-07 | 1962-10-23 | Bell Telephone Labor Inc | Telephone system signaling |
| DE1082300B (de) * | 1959-06-04 | 1960-05-25 | Siemens Ag | Schaltungsanordnung fuer Teilnehmerstellen in Fernmelde-, insbesondere Fernsprech-anlagen mit Tastaturwahl |
| BE632027A (US07923587-20110412-C00022.png) * | 1959-10-02 | |||
| US3187107A (en) * | 1960-03-04 | 1965-06-01 | Int Standard Electric Corp | Voice-frequency key-dialing subscriber's station |
| GB956356A (en) * | 1960-07-21 | 1964-04-22 | Standard Telephones Cables Ltd | Improvements in or relating to signalling methods between subscriber's sets and exchage |
| US3183454A (en) * | 1961-04-24 | 1965-05-11 | Autophon Ag | Circuit for providing sequences of pulses and intervals |
| NL297125A (US07923587-20110412-C00022.png) * | 1962-10-05 | |||
| DE1185665B (de) * | 1963-09-14 | 1965-01-21 | Standard Elektrik Lorenz Ag | Tastengesteuerter Mehrfrequenz-Tongenerator |
| DE1201417B (de) * | 1964-07-10 | 1965-09-23 | Standard Elektrik Lorenz Ag | Tonfrequentes Tastwahlverfahren ohne Gleichstrom-Wahlbegleitzeichen in Fernmelde-, insbesondere Fernsprechanlagen und Schaltungsanordnung zur Durchfuehrung des Verfahrens |
| US3691300A (en) * | 1965-06-30 | 1972-09-12 | Ibm | Tone controlled dictation apparatus |
| CA947444A (en) * | 1972-04-17 | 1974-05-14 | Bell Canada | Telephone substation apparatus |
| US3899638A (en) * | 1973-10-29 | 1975-08-12 | Interface Technology Inc | Portable tone data transmitter |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2732432A (en) * | 1951-07-13 | 1956-01-24 | hullegard |
-
0
- BE BE565637D patent/BE565637A/xx unknown
- NL NL100359D patent/NL100359C/xx active
- DE DENDAT1050835D patent/DE1050835B/de active Pending
- NL NL215381D patent/NL215381A/xx unknown
-
1958
- 1958-03-10 US US720365A patent/US2951911A/en not_active Expired - Lifetime
- 1958-03-11 GB GB7798/58A patent/GB887276A/en not_active Expired
- 1958-03-11 CH CH5690558A patent/CH363062A/de unknown
Also Published As
| Publication number | Publication date |
|---|---|
| DE1050835B (US07923587-20110412-C00022.png) | 1959-02-19 |
| NL100359C (US07923587-20110412-C00022.png) | |
| CH363062A (de) | 1962-07-15 |
| US2951911A (en) | 1960-09-06 |
| GB887276A (en) | 1962-01-17 |
| NL215381A (US07923587-20110412-C00022.png) |
