The Cisco uBR10-LCP2-MC28C cable interface line card is a combination of two components: Cisco uBR-MC28C, which provides two downstream and eight upstream ports, divided into two domains, and Cisco Line Card Processor (Cisco uBR10-LCP2) adapter card, providing the mechanical and electrical conversions necessary for the Cisco uBR-MC28C cable interface line card to fit the form factor used in the Cisco uBR10012 chassis. The Cisco uBR10-LCP2 adapter card and Cisco uBR-MC28C cable interface line card are mechanically connected to each other using brackets and power connectors. The two cards are inserted into and removed as a single logical and physical unit. The Cisco uBR10-LCP2 adapts the Cisco uBR-MC28C cable interface line card to the form factor of the Cisco uBR10012 chassis and provides proper voltage conversion for the card and chassis, boot code required to use the Cisco uBR-MC28C cable interface line card, SDRAM for buffering packets as they are transferred between the card and PRE1 (or PRE). The Cisco uBR10-LCP2-MC28C cable interface line card supports Online Insertion and Removal (OIR). OIR uses the MAC address assigned to the Cisco uBR10-LCP2, allowing you to replace a Cisco uBR-MC28C on a Cisco uBR10-LCP2 adapter card without losing any configuration information.