SE300837B - - Google Patents
Info
- Publication number
- SE300837B SE300837B SE1313564A SE1313564A SE300837B SE 300837 B SE300837 B SE 300837B SE 1313564 A SE1313564 A SE 1313564A SE 1313564 A SE1313564 A SE 1313564A SE 300837 B SE300837 B SE 300837B
- Authority
- SE
- Sweden
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
- H04Q1/4535—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 with an additional signal transmitted for voice protection
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Telephonic Communication Services (AREA)
- Interface Circuits In Exchanges (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEST21276A DE1192276B (en) | 1963-11-05 | 1963-11-05 | Signal method for touch dialing with tone frequency |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| SE300837B true SE300837B (en) | 1968-05-13 |
Family
ID=7458930
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SE1313564A SE300837B (en) | 1963-11-05 | 1964-11-02 |
Country Status (5)
| Country | Link |
|---|---|
| CH (1) | CH437437A (en) |
| DE (1) | DE1192276B (en) |
| GB (1) | GB1049476A (en) |
| NL (1) | NL6412743A (en) |
| SE (1) | SE300837B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1537837B1 (en) * | 1967-09-28 | 1970-11-12 | Siemens Ag | Circuit arrangement for frequency-selective dial number plate receivers in telecommunications, in particular telephone systems |
-
1963
- 1963-11-05 DE DEST21276A patent/DE1192276B/en active Pending
-
1964
- 1964-10-30 GB GB4431164A patent/GB1049476A/en not_active Expired
- 1964-11-02 SE SE1313564A patent/SE300837B/xx unknown
- 1964-11-02 NL NL6412743A patent/NL6412743A/xx unknown
- 1964-11-04 CH CH1427064A patent/CH437437A/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| CH437437A (en) | 1967-06-15 |
| DE1192276B (en) | 1965-05-06 |
| NL6412743A (en) | 1965-05-06 |
| GB1049476A (en) | 1966-11-30 |