RAD-Series RADIUS Server by Interlink Networks is an Authentication, Authorization, and Accounting (AAA) server that provides standards-based access control and security for mixed access networks, including mobile, wired, and wireless networks. It enables carriers, ISPs, and enterprises to centrally manage AAA functions for network users, supporting multiple services such as dial, wholesale dial, broadband, managed VPN, mobile wireless, and 802.11 Wi-Fi. The server is designed for high performance, scalability, and modularity, running on Solaris and Linux platforms. It fully supports the RADIUS protocol and offers capabilities to manage network access business aspects. The RAD-Series RADIUS Server allows for user-developed plug-in modules to enhance authentication and authorization, modify packets, or call external AAA services. It has been used by telecommunications providers, ISPs, business enterprises, and universities since 1992.