Hey, i connect 2 net from a cable modem. actually i m on a network which is connected vai "Cablemodem".

Does anybody knows how can i make a call from my pc to another pc also to a local phone(hope u get it).

You'll need a program that can do it, I know ICQ supports PC to PC and PC to Phone calls, there are a few free PC to PC call programs around, but if you want to call PC to Phone you're going to have to pay. ICQ charges your credit card or account if you do PC to Phone call.

For PC to PC try something like Gamevoice share (http://www.gamevoice.com) as long as both computers have a mic. it's fairly easy. MSN and ICQ also support similar voice chat systems.

http://www.download.com is always a good place to look, just put PC Phone or similar into the software search and it'll give you a few more options.

Netmeeting works as well.

Try this...
http://www.paltalk.com