GSM alarm monitoring center system

A demo of how monitoring center system works with alarm host,for more info please visit our page. http://www.karuoshi.com/a/chenggonganli/20140113/5.html Alarm host used in video http://www.karuoshi.com/a/alarmsystem/20140407/81.html Monitoring center used in video http://www.karuoshi.com/a/alarmsystem/20140407/78.html