Sony PCG-GR300K - Manual (Page 50)

Connecting to a Local Area Network (LAN)
You can connect your notebook to 10BASE-T and 100BASE-TX-type networks. For the detailed settings and devices needed
to connect to the network, ask your network administrator.
Connecting to LAN
Caution:
Warning: Only connect 10BASE-T and 100BASE-TX cables to the Ethernet port. Do not connect any other type of
network cable or phone cable. Connecting cables other than those listed above may result in an electric current
overload and could cause a malfunction, excessive heat, or fire in the port. To connect the unit to the network, contact
your network administrator.
Page 50