TV Cabo Taps Cisco for Wideband Rollout
The Cisco wideband solution uses a modular CMTS (M-CMTS) configuration. A "SPA module" is added to the uBR10012 CMTS, providing a Gigabit Ethernet interface into edge QAM (quadrature amplitude modulation) modulators from Scientific-Atlanta. This way, the uBR10012 handles MAC processing, but bonding to create a wideband cable modem channel is done at the edge QAM. Channel capacity can then be added through the edge QAMs, rather than through fixed-ratio CMTS linecards.
Forthcoming DOCSIS 3.0 specifications define an interoperable wideband architecture. However, the standard is not yet completed, and once it is, it could take years until product certified to meet the standard is generally available. To stay ahead in the bandwidth race, MSOs in competitive European and Asian broadband markets are eager to deploy wideband quickly. Their only near-term option is using proprietary gear.