A wireless time division duplex communication system using code division multiple access has a base station and user equipments. A motion detector is installed on a fixture such as a wall or ceiling. A further improvement for systems using the IS 136 Air Interface Standard consists of the capability to collect the required data through the functionalities of the MAHOMACA. 0% by weight, andor with a light absorption of less than 0. A standard difference of step lengths from a center key of the keyboard plane to the other keys is calculated.