A test pattern generator and a method of generating a test pattern. The indoor wireless communication system includes a system controller for receiving external pager messages and extracting external pager identification of the recipient pager device from the header of the external pager message. A heat conducting body is positioned at least partially between the reflector and the LED. A nanotube provided is capable of absorbing the nanocrystals and contacting the nanotube with the nanocrystals. The method includes obtaining information regarding operation of the DSL service over a plurality of different time periods, comparing the information for a first of the plurality of time periods with the information for a second of the plurality of time periods, and determining the condition exists based on the comparison. 01 mm2 thereof not more than one protrusion that can penetrate the ceramic green sheet of the multi-layered unit laminated on the base substrate to half or more the thickness of the ceramic green sheet and include per 100 mm2 thereof not more than one protrusion that can completely penetrate the ceramic green sheet.