In a Time Division Multiple Access communication network, a central office provides interactive communication between a service provider and a plurality of user terminals. The external midsole material is made of a material different from that of a ground engaging portion of the outsole. A relative measure of a phase angle difference between two phases permits each phase to be controlled to obtain the desired phase angle difference. The input and output auxiliary information are transferred to and from the memory device on the same terminals that the input data and the output data are transferred. According to the invention, a metabolizable substance is added to non-metabolizable marker substances, said metabolizable substance revealing a manipulation when detected in excreta. The controller is further operable to apply an EL drive signal across the first and second electrodes to cause the layer of EL material between the electrodes to illuminate.