10/100Base-TX Ethernet

Connectors

The connectors on La cards adhere to appropriate standards agreed upon by various standards bodies and are widely available.

This section includes pin usage information for the RJ-45 twisted pair connector.

Connector Pin Usage for 10- Mbit/s Twisted-Pair Connector

Use unshielded twisted-pair cables that comply with the IEEE 802.3 Type 10Base-T standard. See Table B-2 “IEEE 802.3 Type 10Base-T Standard” for pin information, and Figure B-1 for the pin layout.

Table B-2 IEEE 802.3 Type 10Base-T Standard

Pins	Signal
1 2	(transmit +) (transmit -)
3 6	(receive +) (receive -)

 

Figure B-1 Pin Layout of RJ-45 Connector on PCI-X Card

Cabling

Incorrectly wired or installed cabling is the most common cause of communications problems for LANs. HP recommends that you work with a qualified cable installer for assistance in your cabling requirements.

The available HP cables are as follows:

Table B-4 summarize the cabling requirements for 100Base-T products.

	CAUTION: The unshielded twisted-pair cables you use with the PCI-X 10/100Base-TX card must comply with the IEEE 802.3u 100Base-TX standards in order to meet emissions requirements. These standards support cabling up to 100 meters only.

Cable Lengths

For more information on cable lengths and number of nodes supported by 10/100Base-TX, see the IEEE 802.3u Specification and Fast Ethernet, Dawn of a New Network by Howard W. Johnson (published 1996 by Prentice Hall PTR, Upper Saddle River, New Jersey 07458. Phone 800-382-3419. The ISBN number is 0-13-352643-7).