1NETWORK INTERFACE CARD
INSTALLATION
This chapter describes the 3C509B network interface card (NIC),
provides procedures for installing the NIC, and describes the
correct network cable to use for connecting each version of the
NIC to an Ethernet network.
Network Interface Card Overview
The four versions of the 3Com® EtherLink® III ISA 3C509B NICs are
shown in Figure 1-1. These NICs connect your ISA or EISA PC to an
Ethernet network using up to three different types of media.
Figure 1-1 3C509B Network Interface Cards
Each NIC has a light-emitting diode (LED) called the link LED,
which indicates whether there is an active connection between
the NIC and the hub. See “Link LED” later in this chapter for a
more complete description of this function.
AUI port
RJ-45 port
BNC port
3C509B-TPC 3C509B-TP 3C509B-COMBO3C509B-TPO
LED
LED
LED
LED