A system and method for facilitating a user defined virtual space is disclosed. The method of this embodiment may include, in response, at least in part, to receipt at a first node of a request issued from a second node to change from one mode of operation to another mode of operation, selecting an amplitude of a signal to be propagated between the first node and the second node during the another mode of operation. A portable terminal sends HTML data for controlling controllable units and allows a user to browse HTML data sent from the gateway, either via a wireless data communication line at home or via the Internet away from home. The modular power system is also low profile for ease of maintenance. A variety of other techniques are also described herein. The raised regions of the filler material are then selectively removed in a single planarizing step without removing the filler material in the lowered regions using a fixed abrasive hard polishing pad, as opposed to an abrasive slurry.