SIMOCO software download. DMR, APCO25, P25, MPT1327. SIMOCO Xd standards compliant with a cloud-based distributed architecture. DMR operates within the existing 12.5kHz channel spacing used in licensed land mobile frequency bands globally and meets future regulatory requirements for 6.25kHz channel equivalence. The DMR protocol covers unlicensed (Tier I), licensed conventional (Tier II) and licensed trunked (Tier III) modes of operation. Integrator of Terrestrial Trunked Radio (TETRA). SIMOCO Wireless Solutions P25, it provides system owners freedom of choice in mobiles, portables and infrastructure, since TIA compliant products mixed within a radio system, avoiding a proprietary lock-in to a single supplier.