Have recently installed a spectralink system with a Mitel 3300 CX controller. We have one OAI Gateway and one SVP server. The phones (6) are 640i. They are working, except one or all will get a "No SVP response". We have to turn the phones off. Then shutdown the SVP server. Bring them all back up again. Everything will work for the rest of the day. The next day the same thing. The troubleshooting guide says it could be an AP point or a possible bad SVP. We do not seem to have any other issues with the AP points. Also the Mitel and the Spectralink gear is on one network, the AP's and the phones are on another with a Cisco ASA 5520 tying them together. Any ideas, hopefully, without replacing the SVP.