Redback Networks occupies a valuable position at the edge of the Internet. The company provides edge routers and other equipment that telecommunications companies and Internet service providers use to deliver broadband services to their subscribers. Its Subscriber Management Systems connects large numbers of network users so companies can deploy high-speed broadband (primarily digital subscriber line) access to the Internet. Redback's SmartEdge system lets carriers provide optical and Internet protocol data transmission within metropolitan networks. Redback is a unit of Ericsson.