Abstract: Unwanted audible noise on a mixed voice data channel is reduced by disabling an audio output device in a radio receiver or transceiver when the receiver determines that the RF signal received contains binary digital bit data. Alternatively, the receiver enables the audio output device when it determines that the RF signal received does not contain binary digital bit data.

Abstract: A modular building block for electronic circuitry is provided with areas for mounting circuitry thereon. Posts of a particular geometric shape and receptacles of a complementary geometric shape are provided on the substrate. The posts and receptacles are coated with an electrically conductive material and connected to nodes within the circuit such that when blocks are interconnected, post within receptacle, the interconnection provides both physical and electrical connection. An alternate embodiment is disclosed having fingers and edge cards, configured such that the fingers of one block grasp the edge cards of another block, providing physical and electrical connection between the blocks.

Abstract: A paging receiver has a predetermined number of displayable characters, a microcomputer for receiving and processing data messages, a plurality of control switches for operating the computing means, and a memory for storing a plurality of received data messages. The microcomputer selects a data message to display from the memory, arranges the data message into a plurality of screens, computes an individual variable screen timeout value for each screen, and displays each screen on the display in a predetermined order for the screen timeout value computed. The screen timeout value computed on the basis of the message content of the screen, the presence of control characters in the data message, or the generation of input signals from the control switches. The screens can be displayed in a forward direction or a reverse direction. Each direction can either be a fast or a slow rate.