This product integrates a VoIP telephone adapter with SIP support, a Gateway Router with Stateful Packet Inspection and NAT Firewall, a 4-Port 10/100Mbps Ethernet Switch, and USB Port into a single product. It allows one or more normal phones to place and receive calls worldwide over the internet, and also to connect to any phone on the Public Switched Telephone Network.
I am not certain if this product requires a subscription to be fully functional. I know it is new in the box.