3Com 3C16704A office connect ethernet hub 4-port. A highly cost-effective, entry-level unmanaged hub, the OfficeConnect Hub TP4 provides four 10 Mbps twisted-pair connections and represents the most economical OfficeConnect product for home or small businesses.The TP4 is operational in minutes. Its four RJ-45 10BASE-T connections have built-in diagnostic LEDs that indicate packet receipt, packet collision, and port status. The Alert LED indicates excessive network use or a partitioned 10BASE-T port. The TP4's CoolCurve self-ventilating design eliminates the need for cooling fans, increasing reliability by eliminating a potential point of failure. The external power supply simplifies maintenance in the event of a power supply failure and its compact design saves space and ensures silent operation. Another important design feature are the 'stacking clips' that allow convenient expandability and secure stacking of up to four OfficeConnect units. Plus, an MDI/MDIX switch allows connection to a workstation or another Ethernet hub to the fourth twisted-pair port, supporting the connection of up to four hubs in series. 12 available YB356