HYX57 Wireline Adapter

The term radio-wire integration (RWI) is being replaced by Net Radio Interface (NRI). The functions and operations remain the same, but the name change more closely reflects the service provided. NRI systems can be secured through the use of the Vinson (KY-57 and KY-58) secure systems.

The HYX-57 provides the interface for the KY-57 to a standard 2- or 4-wire telephone transmission line, but it does not encrypt or decrypt. This is done by the KY-57. Distance between HYX-57s should be no greater than 16 kilometers (10 miles). If a secure wire line is required over a distance greater than 16 kilometers (10 miles), two HYX-57s can be placed back-to-back to double the range.

HYX-57 photos courtesy William L. Howard Ordnance Technical Intelligence Museum.

Front View
Side View

Rear View
(Photos in this section courtesy Warren Brader, Combat Communications and Surveillance Museum, San Diego)

Interior views showing the HYX-57 circuit boards. (E-bay photos)


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March 13/08