JPS54120503A - Coding system for push-button dial signal - Google Patents
Coding system for push-button dial signalInfo
- Publication number
- JPS54120503A JPS54120503A JP2788278A JP2788278A JPS54120503A JP S54120503 A JPS54120503 A JP S54120503A JP 2788278 A JP2788278 A JP 2788278A JP 2788278 A JP2788278 A JP 2788278A JP S54120503 A JPS54120503 A JP S54120503A
- Authority
- JP
- Japan
- Prior art keywords
- bits
- push
- coding system
- dial signal
- button dial
- Prior art date
- 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.)
- Pending
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M11/00—Telephonic communication systems specially adapted for combination with other electrical systems
- H04M11/06—Simultaneous speech and data transmission, e.g. telegraphic transmission over the same conductors
- H04M11/066—Telephone sets adapted for data transmision
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
Abstract
PURPOSE:To improve operation with an increase in number of signals suppressed by coding one character into two two-frequency signals. CONSTITUTION:Depressing push button 2 of push-buttom dial 1 of four by four selects and sends one each of signal frequencies 3 and 4. For example, a two-frequency signal has frequencies of 697 and 1209 Hz. Then, assigning lower four bits through the 1st depression and higher three or four bits through the 2nd depression makes it possible to code seven or eight bits, namely, 128 or 256 characters. An example is the selection of ''4''(100) regarding ''A'' of a JIS code as lower four bits and ''1''(0001) as higher three bits.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2788278A JPS54120503A (en) | 1978-03-11 | 1978-03-11 | Coding system for push-button dial signal |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2788278A JPS54120503A (en) | 1978-03-11 | 1978-03-11 | Coding system for push-button dial signal |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS54120503A true JPS54120503A (en) | 1979-09-19 |
Family
ID=12233252
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2788278A Pending JPS54120503A (en) | 1978-03-11 | 1978-03-11 | Coding system for push-button dial signal |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS54120503A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59500038A (en) * | 1981-12-29 | 1984-01-05 | ツサカニカス,ピ−タ−,ジエ−ムス | Telephone alphanumeric data transmission system |
JP2002028878A (en) * | 2000-06-16 | 2002-01-29 | Hilti Ag | Hand tool device |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4912505A (en) * | 1972-05-18 | 1974-02-04 | ||
JPS4922042A (en) * | 1972-06-19 | 1974-02-27 | ||
JPS4953702A (en) * | 1972-07-26 | 1974-05-24 |
-
1978
- 1978-03-11 JP JP2788278A patent/JPS54120503A/en active Pending
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4912505A (en) * | 1972-05-18 | 1974-02-04 | ||
JPS4922042A (en) * | 1972-06-19 | 1974-02-27 | ||
JPS4953702A (en) * | 1972-07-26 | 1974-05-24 |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59500038A (en) * | 1981-12-29 | 1984-01-05 | ツサカニカス,ピ−タ−,ジエ−ムス | Telephone alphanumeric data transmission system |
JP2002028878A (en) * | 2000-06-16 | 2002-01-29 | Hilti Ag | Hand tool device |
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