Abstract :
Control circuitry integrate pieces of communication equipment into VHF communication systems. The control functions for simpler systems are adequately provided by standard remote control units, using options to provide for a variety of needs. More complex systems require special control circuitry and control consoles whose design is part of the overall system design. A duplex backbone system such as used on cross-state turnpikes is typical of such complex systems. Party line vs. multi-channel design of such systems is contrasted and use of various devices such as receiver voting discussed. Console design is illustrated by discussing features of the Massachusetts Turnpike Control Console. Range of control design is indicated by mention of two-way mobile telephone requirements and the potential field of remote control from portable control consoles, such as remote control of a switching locomotive.
