Systems and methods for optimizing system performance of capacity and spectrum constrained, multiple-access communication systems by selectively discarding packets are provided. Then, the control section determines that the unit is connected to the control substrate when the dropped voltage is applied to the terminal. However, where the stream of bits comprises multiplexed services, it is difficult to measure the phase of the parts of the stream of bits relating to a service of interest without first demapping or demultiplexing the stream of bits. The columns of indicia for the game are, for example, arranged as visually spinable reels.