Methods and apparatus for wireless communication in a wireless communication network that includes receiving a synchronization channel signal signal, a secondary synchronization channel signal, and a primary scrambling code signal) and a part of a common pilot channel signal in the same portion of the slot of the frame. Specifically, an etched and coated cavity is formed in the backwall of the substrate underlying the air gap to receive transmitted light and redirect it onto controllable paths within the substrate. The processor is further configured to instruct a firewall to allow the CTU to pass to the respective one or more applications or to reject the CTU based on the determination. The metal weld plate has a thermal mass and thickness capable of withstanding resistance micro spot welding of a strap interconnect without significant resultant damage to the device.