Here you go mate!
1) Get a VoIP phone adapter - you cannot use an ordinary (PSTN) phone unless it specifically mentions VoIP or Skype. So to use analog phone as VoIP phone, you need to connect that phone to VoIP adapter. Few companies like IPvaani (ipvaani.com)provide free VoIP service to use that adapter
2) The VoIP company you obtain your phone adapter from should send you instructions on how to hook it up. Some phone adapters are intended to go between the cable modem and your router or computer, while others must be plugged into a router that you supply. Follow the instructions provided.
3)
4) Connect a telephone to the LINE 1 port of the phone adaptor using a standard phone line.5) Power on your phone adapter by plugging in the power cord to the back of the adapter and the plug into the wall outlet. You should leave this plugged in at all times to maintain your phone service.
6) Wait a couple minutes while your phone adaptor starts up.
7) There may be updates that need to be downloaded, such as new firmware or changes to your features. These will be downloaded automatically. Do not interrupt this process by unplugging the power to the phone adapter or ISP supplied modem.
8) Pick up your telephone receiver and listen for a dial tone. If you hear a dial tone, you have finished the installation and can begin making calls.[/B]