Dell Precision Guide De Configuration Et De Référence Rapide page 21

2
Network Adapter and Modem
Insert the network cable, not the phone line, into the network connector.
If you have an optional modem, connect the phone line to the modem.
NOTICE: Do not connect a modem cable to the network adapter. Voltage
from telephone communications can cause damage to the network adapter.
NOTE: If your computer
has a network expansion
card installed, connect the
network cable to the
network card, not to the
connector on the
computer back panel.
Setup and Quick Re ference Guide
21