JPS569075B2 - - Google Patents
Info
- Publication number
- JPS569075B2 JPS569075B2 JP9457375A JP9457375A JPS569075B2 JP S569075 B2 JPS569075 B2 JP S569075B2 JP 9457375 A JP9457375 A JP 9457375A JP 9457375 A JP9457375 A JP 9457375A JP S569075 B2 JPS569075 B2 JP S569075B2
- Authority
- JP
- Japan
- 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
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q1/00—Details of selecting apparatus or arrangements
- H04Q1/18—Electrical details
- H04Q1/30—Signalling arrangements; Manipulation of signalling currents
- H04Q1/44—Signalling arrangements; Manipulation of signalling currents using alternate current
- H04Q1/444—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies
- H04Q1/45—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using multi-frequency signalling
- H04Q1/453—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using multi-frequency signalling in which m-out-of-n signalling frequencies are transmitted
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP50094573A JPS5234608A (en) | 1975-08-01 | 1975-08-01 | Multifrequency signal receiving system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP50094573A JPS5234608A (en) | 1975-08-01 | 1975-08-01 | Multifrequency signal receiving system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5234608A JPS5234608A (en) | 1977-03-16 |
| JPS569075B2 true JPS569075B2 (show.php) | 1981-02-27 |
Family
ID=14114032
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP50094573A Granted JPS5234608A (en) | 1975-08-01 | 1975-08-01 | Multifrequency signal receiving system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5234608A (show.php) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58162073U (ja) * | 1982-04-22 | 1983-10-28 | 株式会社精工舎 | 時計などの文字板取付け構造 |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS546404A (en) * | 1977-06-17 | 1979-01-18 | Nippon Telegr & Teleph Corp <Ntt> | Multi-frequency signal mixer with control circuit for signal transmission time-length |
| JPS5828995B2 (ja) * | 1977-12-28 | 1983-06-20 | 富士通株式会社 | 多周波信号検出方式 |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA976675A (en) * | 1972-10-16 | 1975-10-21 | Microsystems International Limited | Dual tone receiver |
| JPS536671B2 (show.php) * | 1973-05-23 | 1978-03-10 | ||
| US3875347A (en) * | 1973-10-01 | 1975-04-01 | Gte Automatic Electric Lab Inc | Multifrequency signal receiver |
-
1975
- 1975-08-01 JP JP50094573A patent/JPS5234608A/ja active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58162073U (ja) * | 1982-04-22 | 1983-10-28 | 株式会社精工舎 | 時計などの文字板取付け構造 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5234608A (en) | 1977-03-16 |