| Summary: | Approved for public release; distribution unlimited. === Current demands on communications facilities are necessitating
conversion of existing single channel circuits to high speed, online
encrypted, multiple channel circuits for military usage.
Limited allotted frequencies and expensive cables require user
sharing of most circuits, requiring selection methods to enable
terminal equipment of the desired addressee. A selective call teletype
device capable of operation at any commonly used speed, constructed
with microcircuits, was designed and built to provide the
terminal selection capability required in the multiple circuits.
Small size, weight, and power requirements and the high reliability
possible with microcircuits make a unit of this type attractive for
conversion of existing systems as well as in the design of new
equipment.
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