摘要
提出利用电话网传递报警信息的方案,并给出了详细的电路设计方法。它可用于家庭、办公室及仓库的安全报警。
A scheme of telephone network to transmit warning information is put forward.the circuit design method is given in detail.It is suited for warning safely to household,office and storehouse.
出处
《河北工业科技》
CAS
1999年第3期49-52,共4页
Hebei Journal of Industrial Science and Technology