... -bits CPU and embedded real time operating system to realize remote mobile phone and telephone warning, SMS to voice warning, GPRS ... data to voice warming, FM network warning, local interphone wireless warning, local microphone warning, pre-set messages to voice warning ... port1 RS232 port, 15KV ESD protection; Data bits: 5, 6 ,7, 8; Stop bits: 1, 1.5, 2; Parity: none, even ...