The IDAS digital radio system offers two protocol choices, NXDN and dPMR. Both protocols are open digital radio standards utilizing 6.25 kHz narrowband FDMA technology. With this flexible choice, the IDAS radio system allows interoperability with equipment from other manufacturers for seamless supply/replacement of existing NXDN and/or dPMR systems. FDMA-based protocols are perfectly suited for migrating from an analog system to digital.