An irregular arrangement of slots in a cylindrical slot-array antenna is used to control the radiation pattern, achieving a variation of gain andor beam tilt with azimuth. In an exemplary method, a connection between the telecommunication devices may be established and an indication of inputs at the first and second telecommunication devices received. The fill section is preferably composed of braided wire and includes bristles, or fill, interweaved with the braided wire. A plurality of high efficiency particulate air filters is positioned in the housing downstream of the filter bags with respect to the flow of air through the housing. The pushing member is operable to force a marking element along the insertion member into the marker body. The first plurality of programmable data storage locations are programmable through a serial control interface.