Channel Bonding Cisco uBR-MC88V Cable Interface and Requirement

The Cisco uBR-MC88V cable interface line card is a DOCSIS 3.0 line card designed specifically for Cisco uBR7246VXR and Cisco uBR7225VXR universal broadband routers. This line card transmits and receives radio frequency (RF) signals between the subscriber and the headend over a hybrid fiber-coaxial (HFC) system.

The Cisco uBR-MC88V cable interface line card serves as the RF interface between the cable headend and the DOCSIS-compliant cable modems, EuroDOCSIS-compliant cable modems, or set-top boxes (STBs). The Cisco uBR-MC88V cable interface line card has eight RF upstream (US) and two downstream (DS) physical connectors. Each downstream physical connector includes four downstream channels. The Cisco uBR-MC88V line card supports two cable interfaces (MAC domains), and the downstream and upstream channels are dynamically associated with any of these MAC domains.

Upstream data, from the subscriber, comes through the upstream ports (US0–US7) on the Cisco uBR-MC88V cable interface line card. The line card then processes and configures the data and sends it across the backplane to the WAN or backhaul card (or both), and out to the Internet.

Downstream data, to the subscriber, comes from the Internet through the WAN or backhaul card (or both), and across the backplane to the Cisco uBR-MC88V cable interface line card. The Cisco uBR-MC88V line card processes and configures the data and sends it out through the appropriate radio frequency channel on a downstream port (DS0–DS1) to be combined with the rest of the downstream signals in the headend.

The Cisco uBR-MC88V cable interface line card supports both DOCSIS and EuroDOCSIS cable modem networks. The card supports downstream channels in the 69 to 999 MHz range, and upstream channels in the 5 to 55 MHz range. The Cisco uBR-MC88V cable interface line card supports Annex B and Annex A data rates, channel widths, and modulation schemes, and has DOCSIS MAC management and spectrum management capabilities. This card also supports DOCSIS 3.0, A-TDMA, S-CDMA, downstream bonding, and upstream bonding rates.

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