Dial pulse digit detector
US5218636A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 7, 1991 |
| Grant date | Jun 8, 1993 |
| Priority date | — |
| Expiry date | Mar 7, 2011 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04Q1/46
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
Method and apparatus for detecting and identifying dial pulse digits in a telephone signal. An embodiment of the inventive method includes the steps of: detecting a dial pulse "0" digit; analyzing the dial pulse "0" digit to determine a predetermined set of data to provide a template which is characteristic of the dial pulse "0" digit; detecting a further dial pulse digit; analyzing the further dial pulse digit to determine a predetermined set of data which is characteristic of the further dial pulse digit; and comparing the predetermined set of data of the further dial pulse digit with the template to identify the further dial pulse digit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.