Sony PCV-RS600 - Manual (Page 37)

Connecting the Telephone and Modem Cables
37
4 Insert the plug end of the splitter device into the wall jack.
5 Plug the modem cable into the modem line jack located on the back panel of
the computer.
To connect the telephone and modem cables
Your computer has a protective sticker covering the Ethernet port located
on the rear panel. Connect only 10BASE-T and 100BASE-TX cables to the
Ethernet port. Using other cables or a telephone cable may result in an
electric current overload that can cause a malfunction, excessive heat, or fire
in the Ethernet port. For help on connecting to a network, see your network
administrator.
“1-to-2” jack adapter
(splitter - optional)
Modem line jack