Several years ago, a world leading company in critical two-way wireless communications systems used by public safety and government organizations contracted Sealevel to design an ultra-reliable industrial computer to monitor and control remote broadcast sites nationwide. Sealevel responded with a solid-state system that included all the dense I/O required packaged in a compact 1U, rackmount enclosure. The customer was so satisfied with the operation and quality of over 1,500 units installed to date that they commissioned Sealevel to refresh the design and upgrade to a faster processor and more memory for compatibility with todays information assurance software, which is required for new installations.