The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 19, 2017
Filed:
Jun. 23, 2016
Electronics and Telecommunications Research Institute, Daejeon, KR;
Jae-Hong Ruy, Sejong, KR;
Hyo-Chan Bang, Daejeon, KR;
Byeong-Cheol Choi, Daejeon, KR;
Hoon Jeong, Daejeon, KR;
ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE, Daejeon, KR;
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.