The Cisco uBR10-LCP2-MC28C cable interface line card is a combination of two components: cable interface line card and line card processor adapter card. Cable interface line card provides two downstreams and eight upstreams, divided into two domains. Line card processor adapter card provides 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-MC28C cable interface line cards, together with external IF-to-RF upconverters, serve as the RF interface between the cable headend and DOCSIS-based cable modems and set-top boxes (STBs). The cable interface line card supports 6-MHz National Television Systems Committee (NTSC) channel operation, using standard (STD), Harmonic Related Carrier (HRC), or Incremental Related Carrier (IRC) frequency plans conforming to EIA-S542. The card also supports downstream channels in the 54 to 860 MHz range with upstream ranges of 5 to 42 MHz.