Hi, I am messing around with Estalix seeing how it could be used in our company instead of the Samsung pbx we have. Elastix is running well, no problems. I can use it to pick up my Linksys SPA942's no problem, straight away with no tweaks. Can't get them anymore so I bought the Cisco 504G's to play around. The 504G's are not being picked up by the End Point Configurator, default settings, they all appear to be the same as the Linksys. Apologies if this is very basic, I just can't grasp what is different. NAT is turned on. Many thanks in advanced. Gabi.