Staas & Halsey LLP
Line interface unit of multifunction printer and facsimile
A line interface unit in which a circuit to detect a calling line and a ring signal includes a connecting unit connected to a public switched telephone network (PSTN) to individually detect the calling line and the ring signal and to commonly use an insulating circuit electrically insulated from PSTN. A circuit to detect the calling line and the ring signal is simply implemented so that economical burden can be reduced.
Samsung Electronics Co., Ltd.
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H04N H04N H04M
inventional additional inventional
Jeong Baek Jong Cheol Yun Tae
Lee Oh Kim