IS-380 is a IP Alarm trigger . Using dry contact connect with sensor when trigger NO-&gtNC or NC-&gtNO,IBS software will active schedule to play mp3/wav file to single speaker or group speaker to Alarm Example: Reservoir gate have a sensor and connect with our IS-380 via dry contact The reservoir gate open, trigger NO-&gtNC. IBS System will play a mp3 preprogram file to specific speaker Option: IP Broadcasting System User can broadcast announcements to a group of office or branch or classes. IBS-5: handle 5 pcs IS serial devices IBS-10: handle 10 pcs IS serial devices IBS-20: handle 20 pcs IS serial devices IBS-40: handle 40 pcs IS serial devices IBS-60: handle 60 pcs IS serial devices IBS-80: handle 80 pcs IS serial devices IBS-200: handle 200 pcs IS serial devices Functions DIM:17x14.5x4cm Protocol :SIP(RFC2543, RFC3261) Dry contact Input:1 port power:110V-240V 12V/1A network:RJ45 10/100Mbps when dry contact from 0 to 1, IBS software will play pre-recorded voice message to signal or group speakers Warranty:1 year