Sony VAIO Digital Studio PCV-E314DS Reference Manual page 21

Telephone and Line
The Telephone and Line 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,
and the Telephone jack is for connecting the computer to a telephone.
Line Telephone
Accidentally plugging a phone line from the wall into the modem's Telephone jack, and a
telephone into the Line jack, will not damage the modem card or telephone equipment.
However, the modem will not work correctly.
Identifying Components
13
KY0014.VSD