Every phone compatible with Asterisk should work under lmce. However, there is one thing that makes a phone special under lmce. If a device template exists for a given phone, the phone gets autoconfigured. For example, when I plugged my Snom 360 into my internal network, it automatically got reconfigured from its old settings to lmce. The Cisco 7970 is even better, as it not only gets automatically detected, but also works as an orbiter.