Abstract: A chassis divides vertically, with front and rear sections of the chassis joined immediately adjacent a midplane printed circuit board that supports interconnectivity of electronic circuits. Wiring within the chassis is eliminated through directed connections of all components to the midplane. Minimal hardware is required for securing the front and rear sections together, and therefore accessing the midplane for assembly and service is convenient. All components except the midplane are installed and removed from either the front or rear of the chassis without opening or disassembling the chassis. The chassis layout and features facilitate effective cooling of the components in the chassis.

Abstract: A method and apparatus for retaining a detachable cord is shown that includes two retainer halves of substantially identical proportion and construction. The retainer halves are compressed together around a detachable power cord, and are attached about the power outlet of an electronic device. The retainer halves include an anti-pullout tab that protrudes inward towards to the power cord plug to assist in retaining the cord.

Abstract: An enclosure for computer-based telephone switching equipment that suppresses the radiation of electromagnetic interference through the use of multiple overlapping seals and apertures.

Abstract: Apparatus and method for shielding interference, comprising a clamping bracket filled with a filling member, designed to accommodate cables of varying sizes, allow for easy substitution of one cable for another and provide a means to integrate the faraday cage between multiple chassis/enclosures.

Abstract: A system for cooling telecommunications device includes an air inducing mechanism which pushes air into an enclosure of the device and an air exhaust mechanism which exhausts the air from the enclosure. The rate at which the air is pushed into the enclosure is less than the rate at which the air is expelled from the enclosure and these two rates are controlled such that the pressure differential between the pressure within the enclosure and the ambient pressure outside the enclosure is minimized. By minimizing this pressure drop, the airflow mechanisms are able to operate more efficiently, that is, they are able to operate at substantially near their design speed.

Abstract: A system for cooling telecommunications device includes an air inducing mechanism which pushes air into an enclosure of the device and an air exhaust mechanism which exhausts the air from the enclosure. The rate at which the air is pushed into the enclosure is less than the rate at which the air is expelled from the enclosure and these two rates are controlled such that the pressure differential between the pressure within the enclosure and the ambient pressure outside the enclosure is minimized. By minimizing this pressure drop, the airflow mechanisms are able to operate more efficiently, that is, they are able to operate at substantially near their design speed.

Abstract: A portable electronic instrument has a front console at which input/output functions are exposed. In order to protect the input/output functions when the instrument is being carried, a cover plate which is mounted to the instrument cabinet can be locked in a position covering the console. To use the instrument, the cover is unlocked and pivots to a position in which it doubles as a stand to space the front end of the instrument from an underlying support surface and to incline the console to the vertical.