Link Led; Connecting The 3C509B-Combo Nic Using The Aui Port - 3Com EtherLink III User Manual

Figure 2-4 Connecting the 3C509B-COMBO NIC Using the AUI Port
3 Move the slide latch up to the closed position to
lock the cable in place.
4 Connect the other end of the AUI cable to the
external transceiver.
To complete installation, you must install the network
driver, as described in Chapter 3.

Link LED

The 3C509B NICs have an LED that indicates when there
is an active 10BASE-T connection between the NIC and
the hub.
When you first install the NIC and power up the
computer, the LED lights, but the link is inactive. To
enable the link, you must install the network driver.
Link LED
AUI port
AUI
connector
2-5