Sony VGN-P11Z/G User Manual page 52

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Using Your VAIO Computer
!
Do not plug a telephone cable into the network (Ethernet) port on the display/LAN adapter.
If the network (Ethernet) port is connected to one of the telephone lines mentioned below, high electric current to the port may cause damage,
overheating, or fire.
- Home (intercom speakerphone) or business-use telephone lines (multi-line business telephone)
- Public telephone subscriber line
- PBX (private branch exchange)