The document introduces the ETERNITY MEX, a military exchange switch. It has a compact and ruggedized form factor compliant with military standards. It functions as a local/transit switch using digital PCM-TDM and IP technology with high-density 1024x1024 switching. It has a modular architecture with redundancy and hot-swappable cards. Key features include extensive diagnostic testing, secure remote management, and ruggedization for harsh military environments.