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Appendix B 99

Hardware Reference Information

Connector Information

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

connector. Connectors on LAN adapters adhere to appropriate standards

agreed upon by various standards bodies and are widely available.

Incorrectly wired or installed cabling is the most common cause of

communications problems for local area networks. HP recommends that

you work with a qualiﬁed cable installer for assistance in your cabling

requirements.

CAUTION The unshielded twisted-pair cables you use with the HP-PB

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.

HP-PB 10/100Base-TX Card Twisted-Pair Connector

There is only one connector on the card that is used for either 10Base-T

or 100Base-TX operation. The operating mode is determined by the

setting of the hub or switch to which the card is connected.

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.

Table B-1 IEEE 802.3 Type 10Base-T Standard

Pins Signal

(transmit +)

(transmit -)

1 2 ... 94 95 96 97 98 99 100 101 102 103 104 ... 111 112

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HP -PB 10 Manual do Utilizador Página 99