HI I installed a zyxel vdsl switch into a motel. The 200 has been running just fine. After all of the cross connects, modems installed into rooms, and everything is said and done. My internet works. My phone can receive calls on the extension and the DID. I can make extensions calls. But when I press 9 and make a phone call I get a busy signal. I have tried many numbers, they all ring busy. Any ideas??