Abstract: A portable bullet resistant screen is disclosed. The screen consists of a flexible sheet made of a bullet resistant material such as kevlar, or ballistic nylon. The flexible sheet has a width, a length and an opposite first and second ends. A first member is rigidly attached to the first end of the sheet and a second member is rigidly attached to the second end of the sheet. The first and second members are each adapted and configured to support the sheet in a substantially upright position. The first member is also adapted and configured to gather the sheet for storage. Preferably the first and second members are elongated and span substantially the entire width of the sheet. The first member is preferably dimensioned and configured to permit the sheet to be rolled onto the first member in a scroll-like fashion. Both the first and second members each have handle portions which are adapted to permit a user to comfortably hold the screen by the handle portions.

Abstract: A telecommunication switching network is described which uses a multistage reverse trunking arrangement for switching single channel subscriber lines on a four wire basis. The switching network is constructed as a pulse code modulated (PCM) time division multiplex (TDM) network. A termination circuit is connected to each subscriber line, and at its output, to a TDM trunk. A switching module is provided for a group of such termination circuits; the module includes a multiplexer and a demultiplexer. Each of the aforementioned TDM trunks is connected at one end to the input of a multiplexer and at the other end to the output of the demultiplexer. An addressable storage for time position conversion is provided in the switching module. The input of the storage is connected to the output of the multiplexer, and its output is connected to the input of the demultiplexer.