I'm trying to understand how 1Gbs is achieved on Category 5e cabling using a 1000BASE-T. This Dell document reads:

"1000BaseT physical layer standard provides 1 Gbps Ethernet signal transmission over four pairs of Cat-5 unshielded twisted-pair (UTP) cable. It transmits at 125 Mbaud, the same symbol rate as Fast Ethernet. But by using more sophisticated five-level pulse amplitude modulation (PAM-5) coding along with four wire pairs, it can transmit much more data. To simplify, each wire pair sends and transmits simultaneously, for 250 Mbps per pair (125 Mbaud ¥ 2 bits). Multiplying 250 Mbps by four pairs yields the nominal rate of 1000 Mbps."

So does that mean we get 1000Mbs when in full-duplex only? This link:

Thanks for any information,

Mike Mascari