Sony PCV-E203 - Manual (Page 76)

VAIO MicroTower System Reference 68
Connectors
Name Connector Type Description
Telephone RJ-11 Connects to phone
Line RJ-11 Connects to telephone line
J4 4-pin connector
on board Connects to Modem In (J9) connector
on system board
JP3 2-pin header Connects to Ring (J20) connector on
system board