100base-tx ethernet cable and connectors
cable characteristics: category 5 unshielded twisted-pair or eia/t1a-568 compliant, 100-ohm shielded twisted-pair data cable with 0.4 to 0.6 mm (22 to 26 awg) wires in two or four twisted pairs (only two pairs/four wires are used for 100base-tx).
maximum segment length: 100 meters
maximum network diameter: 205 meters
connectors: rj-45

crossover cables
when cascading or connecting the hub to another hub, or to a switch or bridge, through a utp port, a modified crossover cable is necessary. with a crossover cable, two pairs of wires are switched at one connector end. carry out the following steps to create a customized, crossover twisted-pair cable:
1)、leave one end of the cable as is, with the rj-45 connector intact. the wiring at just one end of the cable needs to be modified.
2)、at the other end of the cable, connect wires 1 and 2 to contacts 3 and 6, respectively. likewise, connect wires 3 and 6 to contacts 1 and 2. refer to the following diagram: