Sony PCV-LX920 - Vaio Slimtop Computer System Reference Manual page 26

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VAIO Slimtop System Reference Manual
Line and Telephone Connectors
The line and phone jacks are physically identical and have identical
connections. They are standard RJ-11 female phone jacks. However, the
line jack is for connecting to a telephone line that comes from the wall
jack, and the phone jack is for connecting the computer to a telephone.
These jacks are located on the Modem plug-in card.
These connectors are located on the Modem plug-in card and are
accessible from the rear panel.
Line
Phone
✍
Plugging a phone line from the wall into the modem's phone jack, and a telephone into
the line jack, does not damage the modem card or telephone equipment. However, the
modem does not work correctly.