In this blog we are going to look into how a Linksys PAP2 Voice Adapter can be used to make free calls from one device to another over the internet or intranet.
This scheme can be implemented if you have offices in 2 or more locations and you want to enable calls from one office to another. The prerequisites for this is that you must have either Public ip address at both locations or you must be on the same intranet, either through VPN or through Leased lines. Prior to enabling VOIP, you must ensure that your ISP has not blocked VOIP as well as the VOIP ports are open on the Firewall. Continue reading