An electronic terminal performs early detection of unauthorized analysis thereon and prevents unauthorized acquisition and falsification of confidential information that is not to be released to a third party. The method includes the step of introducing a non-corrosive compatible gas or its air mixture having an infrared absorption spectrum into the plurality of stator windings of the liquid cooled generator and detecting leaks through the use of an infrared detection system. For example, when using a single audio channel, a two-dimensional look-up table maybe used to store multiplex patterns wherein one index is the audio frame size and the other index is an encoded value formed from bits representing whether any frames are pending for other corresponding media channels. The MEMS switch includes: a movable beam within a cavity, the movable beam being anchored to a wall of the cavity at one or both ends of the beam; a first electrode embedded in the movable beam; and a second electrode embedded in an wall of the cavity and facing the first electrode, wherein the first and second electrodes are respectively capped by the noble metal contact.