Black Box LR0300 Series Managed T1/E1 Fast Ethernet Extender Kit - 1km, 2-MbpsThe Black Box LR0300 Series is a compact, managed solution that bridges Ethernet networks across T1 E1 circuits. Each kit includes two extenders that act as a bridge, enabling you to link two LANs over telco provisioned leased lines with a steady 2 Mbps payload. With no practical distance limits when youre using dedicated T1 E1 circuits, this extender kit is ideal for multi site offices, campuses, manufacturing floors, and data center interconnects