Owner's manual

AT8901 Hardware Description

Page 3 - 7 AT8901 User Guide

Base Interface Uplink

The Hub Board supports four base interface uplinks to the front panel. The switch is connected

to the RJ45 connectors with integrated status LEDs on the front panel via a 10/100/1000BASE-

T quad PHY and two 10/100/1000BASE-T dual magnetics. GbE channels 0/1 to 0/4 of the

switch map to uplink channels 1 to 4.

The upper four RJ45 connectors on the front panel are not used for the AT8901.

Table 3-7: Base Uplink (J27) Pin Assignment

Signal Pin

DB+ 1

DB- 2

DA+ 3

DD+ 4

DD- 5

DA- 6

DC+ 7

DC- 8

Table 3-8: Base Uplink (J27) LEDs Signification

Speed LED (yellow)

OFF 10BASE-T

BLINK 100BASE-TX

ON 1000BASE-T

Status LED (green)

OFF Link Down

ON Link Up and no activity

BLINK Link Up and activity

Yellow

Green

Yellow

Green