The TSAT 3500 hub main unit is designed to support small to medium private star and mesh networks with low data rates from 9.6kbps to minimize costs. It can operate networks with highly asymmetrical traffic where inbound throughput is dominant. The unit is backwards compatible with existing TSAT 3000 hubs and supports network topologies, forward and return link modulation, data rates, and error correction coding. Interfaces include RF, data, and security protocols. It has environmental protections and takes up 1U of rack space operating from 24-48VDC.