The Cisco uBR-MC28C-BNC line cards offer a total of two downstream and eight upstream ports. The cards deliver the capacity and performance needed to meet increased subscriber demands, without requiring purchase of a new system. The cards offer the choice of connectors in a dual 1x4 downstream-to-upstream port ratio.Deploying cable Internet Protocol (IP) data and voice services means cable operators must be able to scale network bandwidth and support large numbers of subscribers efficiently and cost-effectively. Cisco uBR-MC28C-BNC Data-over-Cable Service Interface Specifications (DOCSIS) line cards meet these requirements. The products offer the highest port density available for Cisco uBR7200 Series line cards and give service providers the choice of coaxial BNC or F-type connectors. The Cisco uBR-MC28C-BNC line cards are divided into two radio frequency (RF) domains; each with one downstream and four upstream ports. Upstream ports are fixed to a specific downstream. Both domains operate independently of each other.