Sony PCV-LX810 - Vaio Slimtop Computer System Reference Manual page 27

These connectors are located on the Modem plug-in card and are accessible from
the rear panel.
✍
Accidentally plugging a phone line from the wall into the modem's PHONE jack, and a
telephone into the LINE jack, will not damage the modem card or telephone equipment.
However, the modem will not work correctly.
LINE
PHONE
Identifying Components
13