Yeastar TA100 is an Analog Telephone Adapter that provides 1 analog interface for residential users and small business to convert existing analog equipment to IP-based networks cost effectively. The Yeastar TA100 provides 1 analog interfaces for residential users and small business to convert existing analog equipment to IP-based networks cost effectively. The Yeastar TA100 is ideal for small business to achieve quick and easy connection in various network environments.