Digital Fixed Station Interface
Standard conventional IP audio protocol interfacing Fix Radio Subsystems to Base Radios. This protocol allows conventional GTR 8000 base radios to communicate with third party dispatch consoles over IP interface, or allows the ASTRO 25 system to dispatch third party stations. Base radio with DFSI interface cannot reside within the ASTRO network GTR 8000 base radio supports DFSI for either analog or digital channels (mixed mode is not supported). The ASTRO 25 system also can dispatch either analog or digital third party channels, but not mixed mode.