Help me please... 7971 Phone failed to make video call using VT Advantage. The local and remote windows suddenly drop when call to another video enabled ipphone. I replaced the phone using 7960 and successfully make video call to another ipphone/communicator. 7971 has exactly same setting like 7060.all phone are in 1 region, 1 location with banwidth settings unlimited. call manager version is 4.1.3. vt advantage is the latest update. please helps... tx