Bell sound of phone ringer makes one be nerveous when many phone in the office are ringing simultaneously. Bacause one has to waste much time to recognize or choose which phone is ringing. In the paper, a newly improved ringer system of the phone, whi...
Bell sound of phone ringer makes one be nerveous when many phone in the office are ringing simultaneously. Bacause one has to waste much time to recognize or choose which phone is ringing. In the paper, a newly improved ringer system of the phone, which is a voice-ringer system converted by using memory device, is suggested to lesson time to get the phone, and dissolve the noise pollution by phone's ringing