I am having issues with our phones. If the entire system worked great and then overnight all of our phones stopped working. If I go to my dashboard right now, it says that there are 0/17 extensions up and 1/1 trunks is up. We have a few different models of handsets but most of them are GXP2120s. I can make a direct IP call between the phones but we cannot make standard internal calls, we cannot receive any incoming calls (people get a busy signal if they try to call in), and we cannot make outgoing calls either. Any help would be greatly appreciated! Thanks in advance!