Patent ID: 6269256
Filing Date: 2001-07-31
Classification: H04B,H04M

Abstract:
A foldable portable telephone set, which is foldable so as to be conveniently carried and allows a speech communication in an open state, and which has a light-emitting portion which only emits light when an incoming call is received, and a light-detecting portion which detects light from said light-emitting portion, said light-detecting portion being able to detect light from said light-emitting portion in a folded state, and said light-detecting portion not being able to detect light from said light-emitting portion in the open state, said foldable portable telephone set having an automatic off-hook function with which, after light emission of said light-emitting portion is started when an incoming call is received, if light from said light-emitting portion is detected once by said light-detecting portion but is not detected by said light-detecting portion again immediately thereafter, said foldable portable telephone set automatically shifts to a speech communication mode even if speech communication start operation is not performed;said telephone set further comprising an auxiliary speech communication start key mounted on an exterior of said telephone set for manually selecting the speech communication mode regardless of whether said light detector receives the light emitted from said light-emitting portion.