The device offers performance far exceeding the IEEE specifications, with superior interoperability and industry leading performance beyond 137m of Cat-V cable. The DP83848T also offers Auto-MDIX to remove cabling complications. DP83848T has superior ESD protection, greater than 4KV Human Body Model, providing extremely high reliability and robust operation, ensuring a high level performance in all applications. National's DP83848T incorporates a number of system cost-reducing features not found on other supplier's Physical layer products. For example, the DP83848T incorporates a 25MHz clock out that eliminates the need and hence the space and cost, of an additional Media Access Control (MAC) clock source component. In addition, both MII and RMII are supported ensuring ease and flexibility of design.