AU480006A - - Google Patents
Info
- Publication number
- AU480006A AU480006A AU5913873A AU5913873A AU480006A AU 480006 A AU480006 A AU 480006A AU 5913873 A AU5913873 A AU 5913873A AU 5913873 A AU5913873 A AU 5913873A AU 480006 A AU480006 A AU 480006A
- Authority
- AU
- Australia
- 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
- H04Q1/457—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using multi-frequency signalling with conversion of multifrequency signals into digital signals
- H04Q1/4575—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using multi-frequency signalling with conversion of multifrequency signals into digital signals which are transmitted in digital form
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU59138/73A AU480006B2 (en) | 1972-08-10 | Method and apparatus for detecting the presence of signal components of predetermined frequency ina multifrequency signal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU59138/73A AU480006B2 (en) | 1972-08-10 | Method and apparatus for detecting the presence of signal components of predetermined frequency ina multifrequency signal |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| AU480006B2 AU480006B2 (en) | 1975-02-13 |
| AU480006A true AU480006A (ru) | 1975-02-13 |