A   Connectors and Connection Media 
A.1  1000BASE-T/100BASE-TX/10BA
SE-T Port 
The 1000BASE-T/100BASE-TX/10BASE-T is a port that supports adaptation of three rates, 
and automatic MDI/MDIX Crossover at these three rates. The 1000BASE-T complies with 
IEEE 802.3ab, and uses the cable of 100-ohm Category-5 or Supper Category-5 UTP or 
STP,  which  can  be  up  to  100  m.  The  1000BASE-T  port  uses  four  pairs  of  wires  for 
transmission, all  of  which  must  be connected.  Figure  A-1  shows  the  connections  of  the 
twisted pairs used by the 1000BASE-T port:   
Figure A-1    Schematic Diagram for the Four Twisted Pairs of the 1000BASE-T 
 
In  addition  to  the  above  cables,  the  100BASE-TX/10BASE-T  can  also  use  100-ohm 
Category-3, 4, 5 cables for 10Mbps, and 100-ohm Category-5 cables for 100Mbps, which 
can be up to 100 m. Figure A-2 shows the pinouts of the 100BASE-TX/10BASE-T: 
Figure A-2 Pinouts of the 100BASE-TX/10BASE-T