Connect a PC to PSTN network

I have a land-line phone through my ISP. I use it to call land-line phones free of charge like phones in Europe etc. what I want to do is that I want to use this service from any PC so I can call any land-line phone. I'm a newbie in this but what I understood开发者_如何转开发 so far is that I need to install some kind of VOIP server on PC and connect that server to my home router. The VOIP server will provide me with user name/password that I can use on a VOIP client app on any PC. So that I can authenticate myself from anywhere in VOIP server and call for free. I hope I've explained clearly what I want to do. Thanks alot for any help or advice that could put me on the right way. Cheers.

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You are probably better of asking this question on serverfault.com (you can also migrate this question to there by editing this question)

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you didn't specify if you preferred Windows or Linux, but if Linux is OK for you I'd recommend you look into Asterisk (http://www.asterisk.org/)

While a little daunting at first, it will allow you to do exactly what you want: * it is your VoIP server * you connect it up to your "trunk" (the line provided by your ISP for calls) * you put it on your network * and you can basically authenticate to it using a softphone client on your PC or other device from anywhere and make/receive calls on the line provided by your ISP

With some of the GUI frontends, like FreePBX, basic setup is not too daunting.

Dunno though how you'd do this on a Windows box, I am not familiar with equivalent Windows technical solutions.