You can check for the ata186 at ebay. ATA186 is a FXS device that will connect to your linksys/LAN in the home. U will need a Phone to connect to ATA186. ANy cheap phone will work. Regarding your PDA, if you have a SIP client you can configure it and test it FWD. then You will be able to make calls to FWD community. The limitation with the FWD is that you can call only to the FWD community all over the world and not to any phone.