We've just purchased 2 x Lifesize 2nd Gen phones but are having issues getting them to work with our Icon 600 units. They're connected via the link cable but get stuck on 'initializing network' which just cycles round and round. We've gone through the three finger gesture on startup & carried out a factory-restore & retrograde, several times, with no luck. The suggested 'workaround' is to connect these to a Lifesize 220 system to get the correct firmware loaded but we don't have access these units. Does anyone have a fix?