It can be used in a variety of ways, from building a small network to expanding a larger, more established network. The SuperStack 3 Baseline Hub 12-port TP (3C16440A) has 12 dedicated shielded twisted pair (TP) ports on the front panel. The SuperStack 3 Baseline Hub 24-port TP (3C16441A) has 24 dedicated shielded twisted pair (TP) ports on the front panel. The rear panel also has a slot for a 3Com Transceiver Module; if fitted, the Module will operate in addition to the TP ports. A range of different media Transceiver Modules is available from 3Com. Contact your supplier for details. The Baseline Hub comes with: ! ! Network Connections The Baseline Hub can be used stand-alone or linked with other hubs. Because each Baseline Hub is a single IEEE 802. 3 Ethernet repeater hub, there can be a maximum of four Baseline Hubs between any two pieces of Data Terminal Equipment (DTE) (workstations or other equipment) on the same network. The Baseline Hub is ready to use. You can connect the Hub to any DTE fitted with a 10BASE-T network adapter or a 10BASE-T transceiver. Connect one end of the twisted pair cable to the RJ45 port on the unit and the other end to the RJ45 port on your network adapter or transceiver. You can attach up to 12 or 24 twisted pair segments to the front of the unit. The Baseline Hub can use both shielded 150 Ohm, and unshielded or shielded 100 Ohm twisted pair cables. To remain within 802. 3 10BASE-T rules, the maximum length of cable between the unit and any DTE should not be greater than 100m (328ft). Consult your supplier's technical support department if you need to use twisted pair cables over greater distances...