Abstract: A cordless telephone set advantageously includes a wireless test mode accessible by a user for evaluating performance levels of operating parameters in the cordless telephone set in diverse geographical locations. When configured in a normal operating mode, the cordless telephone set provides normal wireless communications. When configured in the wireless test mode, the cordless telephone set provides audible and visual input to its user for use in determining a maximum acceptable separation distance for satisfactory communications between a telephone handset unit and its associated base unit in the cordless telephone set. This operating range determination for the cordless telephone set is achieved by providing a simulation of a recognizable tone, such as dial tone, to which a user subjectively listens while testing an application environment.

Abstract: A toroidal accelerometer including a toroidal shaped housing having first and second oppositely disposed arcuate shaped electrodes and a third electrode which is a common electrode, all three electrodes being partially immersed in an electrolytic fluid and subject to differential wetting in accordance with the angle of tilt about a horizontal axis of rotation or axis of symmetry of the toroid. A fourth electrode positioned between the first and second electrodes, equi-distant from the third electrode is at all times completely immersed in the electrolytic fluid.