This is the new version of ControlMatrix®. This is a full install, meaning that it formats the hard drive and installs a fresh default 4.1 installation. Only works with Q-Host hardware. This is a self-extracting ISO CD image. Support for default gateway address for using multiple IP subnets. Supports new RealSpeak high quality text-to-speech technology. Client access logging. Optional PIN number via telephone paging unit access. User configurable page timeout. Optional page protection by priority, pages are replayed if interrupted by a higher priority page. Support for TPU2 and TPU4 (2 and 4 port telephone paging units). Supports up to 250 stations and up to 250 paging zones.