Abstract: A communication cabinet, that includes: at least one fan, adapted to rotate at a first direction during a first period and to rotate at a second opposing direction during a second period; a controller, adapted to control the at least one fan; and at least one filter positioned to prevent dust from entering the communication cabinet and to allow air to exit the communication cabinet such as to remove dust from the filter during the second period. A method for dust removal from a filter, the method includes: providing communication cabinet that comprises the filter, whereas the filter is positioned such as to prevent dust from entering the communication cabinet; rotating at least one fan at a first direction during a first period such as to cool at least one communication circuit installed within the communication cabinet; and rotating the at least one fan at a second opposing direction during a second period such as to remove dust from the at least one filter.

Abstract: A computer system using open source software and operating systems is enabled over a global computer network to provide universal, selected applications. The applications can be accessed from a local personal computer, personal digital assistant (PDA), remote dedicated computer terminal, or like devices. Selected applications may include word processing, calendar, address book, picture viewing, music playing, games, email, Internet access, and the like. Personal data, such as pictures, music, games, “favorite places”, email addresses, and application settings are saved to the local client device and to a centralized customer support server. An included software manager ensures that the most current version of each application is used, and, if not available on the client, it can be uploaded, if necessary.

Abstract: This disclosure relates to a high impedance regenerative differential sense amplifier for use with an integrated circuit memory array of single transistor cells. Each of the sense amplifiers is formed of a cross coupled latch connected to the respective columns by source followers and leads from the latch drive write back gates coupled to the respective columns so as to restore a "zero" level of a cell and also leave a precharged "one" level with the cell by charging the appropriate column. The respective columns are initially precharged and balanced and then driven by negative going signals.

Abstract: This disclosure relates to memory array organization of single transistor cells and the differential sense amplifiers provided therewith. To accommodate the differential sense amplifiers, the array is laid out in rows and functional columns where a functional column consists of a pair of columns such that odd row cells are connected to the odd column of the pair and even row cells are connected to the even column of the pair. A differential sense amplifier is then provided for each pair of odd and even columns which are inherently balanced at the sense amplifier terminals. Single ended or edge ended I/O circuitry is provided with direct access to the respective pairs of columns.