四线电话语音信箱

Four -line Telephone Voice Mailbox

设计了一种新型四线电话语音信箱的系统硬件和软件，着重研究了电话的无人值守、电话留言、留言查询、自动拨号功能，解决了多任务处理、发送电平的软件调节、中断向量的修改等问题。

The hardware and software designs of a four -line telephone voice mailboxs systemare. introduced in this, paper. Also introduced are functions of. the telephone watcher-free. tele-phone message, inquiry for telephone message, and autozaatic dialing, as well as tbe znulti - taskprocessing and the revision of the internupt vector, etc.