Also make sure one your ip is correct for talking to it. unless you are on a switch and it is also. 2 make sure the cpu port is not locked out. 3 log in through phone and make sure in 916 what the ip is. 4 make sure someone did not change the community name on you. good luck...

or as tec support always tells us do an upgrade then if you still have a problem call me back..lol!