EXCERA Easy Trunk is a digital trunking system that delivers up to 16 times the capacity of an analog conventional mobile radio system. A more cost-effective solution that allows customers to increase the capacity. All channel resources can be shared by multiple users so that the frequency utilization is improved greatly. The system can easily migrate from Tier-II DMR by applying an software upgrade license to the ER9000 repeaters and connecting them via a layer-2 switch.