BE688746A - - Google Patents
Info
- Publication number
- BE688746A BE688746A BE688746DA BE688746A BE 688746 A BE688746 A BE 688746A BE 688746D A BE688746D A BE 688746DA BE 688746 A BE688746 A BE 688746A
- Authority
- BE
- Belgium
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)
- Monitoring And Testing Of Transmission In General (AREA)
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
- Control Of Amplification And Gain Control (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL6513752A NL6513752A (en:Method) | 1965-10-23 | 1965-10-23 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE688746A true BE688746A (en:Method) | 1967-04-21 |
Family
ID=19794442
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE688746D BE688746A (en:Method) | 1965-10-23 | 1966-10-21 |
Country Status (8)
| Country | Link |
|---|---|
| AT (1) | AT263091B (en:Method) |
| BE (1) | BE688746A (en:Method) |
| CH (1) | CH455888A (en:Method) |
| DE (1) | DE1487844C3 (en:Method) |
| DK (1) | DK118349B (en:Method) |
| GB (1) | GB1136341A (en:Method) |
| NL (1) | NL6513752A (en:Method) |
| SE (1) | SE345946B (en:Method) |
-
1965
- 1965-10-23 NL NL6513752A patent/NL6513752A/xx unknown
-
1966
- 1966-10-19 DE DE19661487844 patent/DE1487844C3/de not_active Expired
- 1966-10-20 SE SE1430866A patent/SE345946B/xx unknown
- 1966-10-20 DK DK544166A patent/DK118349B/da unknown
- 1966-10-20 AT AT977766A patent/AT263091B/de active
- 1966-10-20 GB GB4701366A patent/GB1136341A/en not_active Expired
- 1966-10-20 CH CH1520566A patent/CH455888A/de unknown
- 1966-10-21 BE BE688746D patent/BE688746A/xx unknown
Also Published As
| Publication number | Publication date |
|---|---|
| DE1487844C3 (de) | 1975-08-07 |
| CH455888A (de) | 1968-05-15 |
| GB1136341A (en) | 1968-12-11 |
| DK118349B (da) | 1970-08-10 |
| NL6513752A (en:Method) | 1967-04-24 |
| DE1487844A1 (de) | 1969-01-23 |
| DE1487844B2 (de) | 1975-01-02 |
| SE345946B (en:Method) | 1972-06-12 |
| AT263091B (de) | 1968-07-10 |