Broadband Reports this morning heard from a trusted source who says America’s largest cable operator is considering offering 250Mbps service to customers, perhaps as early as 2011.

While some cable operators (Time Warner Cable) have dragged their feet on DOCSIS 3 upgrades, Comcast has not — it is expected to have 100 percent of its cable systems upgraded this year.

DOCSIS 3 provides vastly increased speeds across a more robust network.  Older standards provided neighborhoods with a single 6 Mhz channel, with a 36Mbps downstream pipeline.  While that may be fine for a neighborhood browsing web pages and checking e-mail, it doesn’t take much too much high bandwidth activity to start slowing speeds down.  DOCSIS 3 “bonds” multiple channels together to create one fat pipeline.  Newer chipsets support eight combined 6Mhz channels, capable of providing that same neighborhood with 320Mbps of capacity.  Using schemes like PowerBoost, or with few others online, Comcast can deliver occasional bursts of speed at 250Mbps to customers without further upgrades, notes Dave Burstein of DSL Prime.

The bigger question is will customers pay the premium price for 250Mbps if Comcast maintains its 250GB usage limit on it?  Super speed tiers like this are useful to customers using high bandwidth applications.  It doesn’t make sense to upgrade to premium speeds if they’re accompanied by a usage governor.

Other stories of interest:

1. Competition in the Nation’s Capital Brings Top Speed Service & Choice – But Comcast Still Caps
2. When Comcast’s ‘Free Upgrades’ Cost Consumers $2 More Per Month
3. ‘Tis The Season for Comcast Rate Hikes: Cable Modem Rental Increases to $5 Per Month
4. Time Warner Cable Nation’s Third Largest Internet Service Provider – 62 Percent of Its Customers Take Broadband
5. Cox Unveils ‘Ultimate Internet’ 50/5 Service in Rhode Island