1000BASE-TX
The Telecommunications Industry Association (TIA) created and promoted a standard similar to 1000BASE-T that was simpler to implement, calling it 1000BASE-TX (TIA/EIA-854). The simplified design would, in theory, have reduced the cost of the required electronics by only using one pair of wires in each direction. However, this solution required Category 6 cable and has been a commercial failure, likely due to the cabling requirement as well as the rapidly falling cost of 1000BASE-T products. Many 1000BASE-T products are advertised as 1000BASE-TX due to lack of knowledge that 1000BASE-TX is actually a different standard. The confusion between 1000BASE-T and 1000BASE-TX probably stems from the fact that most popular form of Fast Ethernet (100 Mbit/s) is known as 100BASE-TX, and the fact that many products support multiple speeds of 10/100/1000Mbit/s and are often promoted as 10/100/1000BASE-TX.
Read more about this topic: Gigabit Ethernet, Varieties