QUOTE(ResQ @ Oct 26 2008, 01:46 AM)
o'm not using wired telephone .. i'm connect to internet using maxis broadband powered by usb modem brand huawei .. like this picture

u protect the power line will be sufficient if u dont have wired lan cable/wired tel line connecting to ur laptop...
QUOTE(cyew86 @ Oct 26 2008, 03:35 AM)
Hmm, let's say I have a computer in my room (running on 500W PSU), with modem router (which means with the phone line and ethernet cable) together with speakers...
Then in another room, there is one computer (another 500W PSU) with printers and speakers, and the ethernet cable runs all the way to my room to the modem router...
How do I protect these equipments in both rooms? Is there any cost effective product/solution? My modem router/network card/PSU been fried for numerous times already, there was a time when the phone line was burnt black as well

here your setup accordingly to ur requirements...
since u have 2 rooms, means u have to protect 2 boundary by using at least 2 models...