Christopher Redding and Robert A. McLean

Abstract: The transmission of E-mail over high-frequency (HF) radio channels is experiencing widespread use in the Government and military communities. This ability is made possible through the convergence of Internet and radio communication protocols, primarily by the implementation of transmission control protocol/internet protocol (TCP/IP) for radio channels. One popular implementation is a software package called JNOS, initially developed by the amateur radio community. JNOS has been adapted for use over HF channels and has been demonstrated to perform at acceptable levels. It has not been characterized in a laboratory environment under known channel conditions. This report presents data that characterizes the performance of the HF E-mail system in a controlled environment, using HF channel simulators.

Keywords: HF; E-mail; HF E-mail; JNOS TCP/IP performance

Disclaimer: Certain commercial equipment, components, and software may be identified in this report to specify adequately the technical aspects of the reported results. In no case does such identification imply recommendation or endorsement by the National Telecommunications and Information Administration, nor does it imply that the equipment or software identified is necessarily the best available for the particular application or uses.

For questions or information on this or any other NTIA scientific publication, contact the ITS Publications Office at ITSinfo@ntia.gov or 303-497-3572.

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