NWT Biz NetTalkTM is a software application installed on a computer, running mainly on Microsoft® Windows®. It provides voice services, allowing users to communicate with traditional voice networks (PSTN). It can be installed on any computer, anywhere, such as at home, in the office, in a hotel, or in a Wi-Fi Hotspot. Users only need to log in to the server, and the required data will be automatically downloaded. In other words, users can use the same phone number anywhere they are with broadband network. Through advanced technology, it can adapt to different network environments and support work behind NAT such as broadband routers.