TELEPHONE SET CAPABLE OF SIMULTANEOUS ORDINARY TALKING/ LOUDSPEAKER TALKING

摘要

PURPOSE:To use a microphone and a speaker of a handset in common for simultaneous ordinary talking/loudspeaker talking by changing over the microphone and the speaker provided to the handset from the ordinary talking circuit into the loudspeaker simultaneous talking circuit. CONSTITUTION:The ordinary talking circuit 6 and the loudspeaker simultaneous talking circuit 7 are connected in parallel with input terminals L1, L2. Further, changeover contacts A1-A4 are relay contacts controlled by a hook switch or a reed switch sending the handset 2 hooking on a telephone set main body 1, and a microphone input terminal MC and a speaker output terminal SP of both the talking circuits 6,7 are connected respectively to a microphone 2m and a speaker 2s of the handset 2 via the changeover contacts A1, A2 and A3, A4. Thus, the microphone and the speaker of the handset are used in common for the simultaneous ordinary talking/loudspeaker talking and the telephone set main body is miniaturized.