I'm having problems getting 2 Express 220s to talk to each other. They are both behind a Juniper SSG20 on both ends. I can see them trying to connect as it comes thru on the screen but that's as far as it gets, it never actually connects the call properly. I've set up the routers to passthrough the h.323 services including the relevant ports stated in the Lifesize manuals. I've set the NAT as enabled on the lifesize and entered the external IP but I'm pretty much at a loss.