Andy's Technical Information Page


Ethernet 10Base-T, 100Base-TX, 100Base-T4
and Crossover Cable Info Page


10BaseT & 100Base-TX Cable
Use 2-pair Category 5 unshielded twisted-pair (UTP) cable. The maximum cable distance between the port and the attached device is 100 meters, including all patch cables, panels, and connectors.

NIC RJ-45 Workstation	Connected To	NIC RJ-45 Workstation
1 (RX+)	~~~~~~~	3 (TX+)
2 (RX-)	~~~~~~~	6 (TX-)
3 (TX+)	~~~~~~~	1 (RX+)
4 (Not used)	~~~~~~~	4 (Not used)
5 (Not used)	~~~~~~~	5 (Not used)
6 (TX-)	~~~~~~~	2 (RX-)
7 (Not used)	~~~~~~~	7 (Not used)
8 (Not used)	~~~~~~~	8 (Not used)

100BASE-TX Cable
Use 2-pair Category 5 unshielded twisted-pair (UTP) cable. The maximum cable distance between the port and the attached device is 100 meters, including all patch cables, panels, and connectors.

NIC RJ-45 (MDI)	Connected To	Switch Hub RJ-45
1 (TX+)	~~~~~~~	1 (RX+)
2 (TX-)	~~~~~~~	2 (RX-)
3 (RX+)	~~~~~~~	3 (TX+)
4 (Not Used)	~~~~~~~	7 (Not Used)
5 (Not Used)	~~~~~~~	8 (Not Used)
6 (RX-)	~~~~~~~	6 (TX-)
7 (Not Used)	~~~~~~~	4 (Not Used)
8 (Not Used)	~~~~~~~	5 (Not Used)

100BASE-T4 Cable
Use 4-pair Category 5 unshielded twisted-pair (UTP) cable. The maximum cable distance between the port and the attached device is 100 meters, including all patch cables, panels, and connectors

Workstation or Server(MDI)	Connected To	Hub RJ-45
1 (TX+)	~~~~~~~	1 (RX+)
2 (TX-)	~~~~~~~	2 (RX-)
3 (RX+)	~~~~~~~	3 (TX+)
4 (Bi-directional4+)	~~~~~~~	4 (Bi-directional4+)
5 (Bi-directional4-)	~~~~~~~	5 (Bi-directional4-)
6 (RX-)	~~~~~~~	6 (TX-)
7 (Bi-directional3+)	~~~~~~~	7 (Bi-directional3+)
8 (Bi-directional3-)	~~~~~~~	8 (Bi-directional3-)

100BASE-TX Crossover Cable
Use 2-pair Category 5 unshielded twisted-pair (UTP) cable. The maximum cable distance between the port and the attached device is 100 meters, including all patch cables, panels, and connectors.
NOTE You cannot use crossover cables on 100BASE-T4 devices.

	Switch or Hub RJ-45 (MDI or MDI-X)
Switch or Hub RJ-45	Connected To	Switch or Hub RJ-45
1 (RX+)	~~~~~~~	3 (TX+)
2 (RX-)	~~~~~~~	6 (TX-)
3 (TX+)	~~~~~~~	1 (RX+)
4 (Not used)	~~~~~~~	4 (Not used)
5 (Not used)	~~~~~~~	5 (Not used)
6 (TX-)	~~~~~~~	2 (RX-)
7 (Not used)	~~~~~~~	7 (Not used)
8 (Not used)	~~~~~~~	8 (Not used)