Adaptable subscriber unit for interactive telephone applications
US6560320B1 · kind B1 · utility
33Cited by
10References
34Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 17, 1999 |
| Grant date | May 6, 2003 |
| Priority date | — |
| Expiry date | Dec 17, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04M2203/25
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A method for telephone communications includes providing a protocol that defines a relation between predetermined graphic elements and respective sequences of dual-tone multi-frequency (DTMF) signals. A screen to be displayed is designed, including one or more of the graphic elements. An encoded representation of the screen is then generated using DTMF signals in accordance with the protocol. The encoded representation is transmitted over a telephone line to a telephone subscriber unit, whereby the one or more graphic elements are displayed by the subscriber unit responsive to the encoded representation of the screen.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.