A predictive dialer is a computerized system that automatically calls groups of telephone numbers, connecting the call to an available agent as soon as it is answered. Predictive dialers are used in telemarketing and customer service call centers to increase the number of live connections that agents can make. Predictive dialers can significantly improve productivity in a call center by automating the process of making outgoing calls. By calling multiple numbers simultaneously and monitoring which calls are answered by humans, predictive dialers can connect agents with live leads much more efficiently than if they were manually placing each call.