NetUP UTM (Universal Traffic Manager) is a professional billing system for Internet Service Providers. The core of the system, written in C++, is a smart and reliable accounting engine working directly with network equipment. It supports up to 100,000 users at a total speed of up to 3 Gbps. UTM allows you to operate a broad range of services: Leased Lines, Dial-Up and VPN, Hotspot, IP-Telephony, etc.