The document provides a product description of the RBS 6601, a main remote solution for radio base stations. It consists of a main unit and multiple remote radio units connected via optical fiber. The main unit houses digital units and provides power distribution. Up to 12 remote radio units can connect and be located near antennas. The system supports applications such as indoor metropolitan sites, suburban shelter sites, highway coverage, and in-building coverage. It describes the hardware architecture, configurations, specifications, and environmental capabilities of the RBS 6601 main remote solution.