The document introduces the ULSB MK III Switch, a ruggedized military exchange switch. It has a compact form factor and is compliant with military standards. The switch functions as a local/transit switch using digital PCM-TDM and IP technologies. It has a modular architecture with redundant power supply and CPU cards. Key features include high density digital switching, distributed processing, and non-blocking operation. The switch is designed for reliability in tactical military environments.