Black Box XL600+ 10Base-T Extender LZ6000A-R3. The 10BASE-T Extender is a high-performance Ethernet repeater that operates over a spare pair of telephone wires already in the walls or buried in the ground. It works with any IEEE 802.3 compatible Ethernet System.Part Number: LZ6000A-R3Model Number: XL600+Also Included:1 x AC Power Supply SA-091A0F-111 x Power Cord LR-5724B