Abstract: A system for choosing a data path through a multi-processor array on a least time and path availability basis. In a preferred embodiment, each processor has an associated path selection element. The element associated with the data source sends out a signal to adjacent elements. The signal is propagated outward through the array until it reaches the path selection element associated with the destination processor. When the signal reaches the destination element, that processor responds by outputting a response signal which is channeled back to the source element via the path selection elements associated with those processors which propagated the preferred path of the original signal, establishing a data path through these elements. Integrated circuits situated as adjuncts to each processor in the array can be fabricated as the elements which implement this system.

Abstract: A communication device is disclosed. The device comprises keyboard means having a plurality of keys. The keys are operable to enable the user to create a message to be communicated, or to select one of a plurality of predetermined messages to be communicated. User operable feedback switch means including a sequential display means presents each key from the keyboard means to the user. The feedback switch means is further operable during the time a key is presented to duplicate the operability of the key being presented. Display means presents either the message to be communicated as it is being created by the user or the selected predetermined message. Housing means having a first face mounts the keyboard means and the user operable feedback switch including the sequential display means. A second face mounts the display means.

Abstract: A rotary dial signal processing circuit and an automatic selecting circuit for combining the rotary dial signal processing circuit with a Touch-Tone digital decoding system. The rotary dial signal processing circuit includes means to interpret line signals as to on/off hook condition, dial pulsing, and completion of a dial pulse sequence. This includes estimation of the time durations of specific signal levels. Thus, for a dial pulse the off-hook signal input goes low for 33-90 ms, causing an appropriate system response; there is no system change for a low input signal of less than 25 ms; a low input signal of over 95 ms is interpreted as on-hook, and causes reset; a high input signal of over 150 ms is interpreted as completion of the dial sequence (timeout). The rotary dial signalling processing circuit counts the sensed dial pulses and provides a 4-bit output code which is compatible with the Touch-Tone code.

Abstract: A multiple-frequency decoder which measures the two-tone output from a multiple-frequency dial type telephone and identifies what number was dialed. A unique binary code is produced as a timed output for each number dialed. In addition, the decoder has provision for detecting and providing as a separate output a unique binary output word whenever a preselected transfer digit, e.g., a 1, 2 or 3 is dialed. With this additional output data, transfer relays can be operated. The decoder inputs are derived from high and low pass filters. The decoder differentiates between valid multiple-frequency tones and extraneous noise, such as voice signals, completely digitally, as follows: once the digital measurement of one cycle of each of the multiple incoming frequencies is made, the combination of all frequency measurements is stored as a k-bit binary word.