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DOCSIS

Comcast Gooses the Upstream

We're still waiting to find out where Comcast Corp. (Nasdaq: CMCSA, CMCSK) will next deploy Docsis 3.0 (though there have been some suggestions), but the MSO has made good on its pledge to fatten up its relatively thin upstream capacity. (See Comcast Boosts Upstream.)

For no additional cost, Comcast said it will ratchet up the upstream speed of its "Performance" tier from 384 kbit/s to 1 Mbit/s, and more than double the upload capacity of its "Performance Plus" package from 768 kbit/s to 2 Mbit/s.

To get the upgrade, customers will need to powercycle their cable modems or reset their embedded multimedia terminal adapters (E-MTAs), which support both high-speed Internet and IP voice services.

In concert with a plan to migrate to a "protocol agnostic" bandwidth capacity management system, Comcast also vowed in March that it would more than double its upstream bandwidth "in several key markets" by year-end. (See Comcast Caves In to P2P Pressure and Comcast Ready to Test New Traffic Cop.)

For those who like to keep track of this sort of thing, the downstream speed cap of Performance remains at 6 Mbit/s, and Performance Plus is still 8 Mbit/s. With "PowerBoost," a technology that taps into latent capacity during big downloads, downstream speeds can jump to a respective 12 Mbit/s and 16 Mbit/s.

— Jeff Baumgartner, Site Editor, Cable Digital News

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