Message sending device and method thereof
US9769322B2 · kind B2 · utility
0Cited by
4References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 23, 2016 |
| Grant date | Sep 19, 2017 |
| Priority date | — |
| Expiry date | Jun 23, 2036 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04M2203/60
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
Disclosed herein are a telephone, a switchboard, and a method for sending a message between the telephone and the switchboard using a Dual Tone Multiple Frequency (DTMF) signal. The telephone includes a sensor interface unit for collecting sensing signals by being connected to sensors, a transmission unit for generating a message using the sensing signals, converting the message into a DTMF signal, and transmitting the DTMF signal and a telephone signal, and a power distribution unit for being supplied with power from the switchboard and distributing the power to operation units.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.