Both in the framework of JVN automata and EVN automata, ordinary transmission states (blue arrows) and special transmission states (red arrows) can be arranged in sequences forming transmission lines. Both the ordinary and the special transmission states can be found in two different excitation levels: the quiescent state (blue for the ordinary and red for the special) and the excited state (cyan for the ordinary and magenta for the special). The transition rules are designed so that any quiescent or excited transmission state pointed to by an excited state becomes or remains excited at the next time step. By contrast, an excited state, which is not pointed to by an excited state but points to an excitable state, becomes quiescent at the next time step. Therefore, in a transmission line formed by a coherently oriented sequence of ordinary or special transmission states, as shown in the figure here below,
any set of excited states propagates as a train of excited states. Since the role of these trains is that of providing sequential excitations of other states (confluent state, vacuum state, etc), they will be called activation trains. An activation train formed by a single pulse is called an activation pulse or simply a pulse.
Activation trains propagate along ordinary transmission lines and special transmission lines as sequences of excited and unexcited states behaving as binary digits (bits). Suitable combinations of transmission lines and confluent states behave as networks capable of performing logical operations. The logic is not Boolean, however, as in the framework of JVN and EVN automata the logical operator NOT (negation) cannot be included as an operation performed by a cell state. The reason for this impossibility is obvious. Were a hypothetical negation-state inserted into a quiescent transmission line, the line portion downstream to such a cell would rapidly become permanently excited, with unpredictable effects at the line end. Suitable cell-state circuits, however, can transitorily fake the logical operation NOT.