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2-20 Hardware Description
Enhanced Vanguard Daughtercards
10/100BaseT Enhanced Daughtercard
Introduction The 10/100BaseT Enhanced Vanguard Daughtercard conforms to the Fast Ethernet
specification (IEEE 802.3u) known as 100BaseT. This LAN standard has raised the
Ethernet speed limit from 10 Megabits to 100 Megabits per second. Furthermore, the
card has an auto-sensing feature that allows it to determine if the connection is
10BaseT or 100BaseT and adjust its speed as required. This card supports half or full
duplex operation with the default being half duplex.
Figure 2-27 shows a drawing of the 10/100BaseT Enhanced Vanguard Daughtercard.
Figure 2-27. 10/100BaseT Enhanced Vanguard Daughtercard
RJ-45 Connector
Pinout
The 10/100BaseT Enhanced Vanguard Daughtercard has a single RJ45 connector
and is cabled using CAT-5 twisted pair copper cables. This table details the pin for
the 10/100Base T RJ45 connector:
EDC LEDs The 10/100BaseT Enhanced Vanguard Daughtercard has two LEDs built into the
rear panel connector. This tables explains the LEDs:
Pin Signal Pin Signal
1 Transmit Positive 4 Not Used
2 Transmit Negative 5 Not Used
3 Receive Data Positive 6 Receive Data Negative
LED Description
Yellow • On: Active (Tx/Rx activity).
• Off: No activity.
Green • On: The link is up.
• Off: The link is down.