Method and apparatus for pulse/tone detection and selection
US5228079A · kind A · utility
2Cited by
1References
11Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 12, 1991 |
| Grant date | Jul 13, 1993 |
| Priority date | — |
| Expiry date | Jul 12, 2011 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04M1/27
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A method and apparatus for permitting a telephonic device to select the mode of dialing, pulse or tone, which is proper for the local telephone network interface to which it is connected.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.