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Hardware Description 
2-19
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 2-26 shows a drawing of the 10/100BaseT Enhanced Vanguard Daughtercard.
Figure 2-26. 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.