An auxiliary radio communications system includes a dispatch radio console (DRC), a plurality of antennas, and a radio amplification unit (RAU). The RAU includes first and second repeaters that are in communication with an RAU interconnect board. The first and second RF repeaters receive first and second communication signals from the RAU interconnect board, respectively, and retransmit them to the antennas and to the DRC. The antennas rebroadcast the first and second communication signals over first and second communication channels, respectively. The DRC can include first and second dispatch control modules (DCMs) that receive the first and second communication signals, respectively. The first and second communication signals can originate from the first and second DCMs, respectively, from a first handheld radio tuned to the first communication channel, and/or from a second handheld radio tuned to the second communication channel.