... , expansions, various accessories and software, specially designed for GSM/GPRS wireless systems being used for remote measurements, data logging, ... -based SMS, Call-IN, Call-Out, Ring, voice &MMSØ IO status ,alarming message includes counters, analog values can ... telephone crystal plug & 1 Audio output interface optionalØ Camera Interface optional x-Messenger,GPRS/GSM/SMS PLC ,monitoring controller