This is not unlimited free calls like a normal residential line. It is for 64kbps. 128kbps is handled as two calls and, therefore, costs twice as much. South Valley Internet can provide a flat rate service in Hollister and San Martin only. South Valley uses PM Access Servers by Livingston.
Most units are compatible.
Livingston supplies setup information for 3Com, Motorola, US Robotics, Adtran, and Ascend.