In order to provide a consistently high-quality video service, AT&T Uverse High Speed Internet throughput speeds may be temporarily reduced when a customer is using other U-verse services in a manner that requires high bandwidth. This could occur more often with higher speed Internet access products. It may be necessary, for some AT&T High Speed Internet users, for AT&T to set a maximum downstream speed on a customer line to enhance the reliability and consistency of performance.

Update: So here's what AT&T just told us: "We’re not referring to the use of high-bandwidth activity from other services, like AppleTV, we are saying that customers who subscribe to our higher-bandwidth tiers could see slowdowns in their Internet throughput." In other words, what this actually means is you won't be slowed down for downloading a whole lot, but if there's network congestion generally speaking, your bandwidth's going to get squeezed, and it's more likely to happen if you've got one of the faster U-Verse broadband packages. People that have a (s)lower-bandwidth tier won't see this as often because their connection is already pokey. AT&T says the "vast majority" of people will never notice.

There's a bunch of other changes in the updated terms of service that you should read too if you're an AT&T customer, like regarding the settling of disputes. There are some clauses about not distributing copyrighted content, but I don't know if those are new, I'm still checking on that. Either way, it's another step toward crappier internet for all, and it's not like you're going to get anything out of it, either. [AT&T]

Comcast tries to ameliorate the news by putting the cap in terms even grandma can understand: 250GB = 50 million emails! 250,000 hi-res photo uploads of the grand kids! But in reality, if you're sharing your connection with roommates and downloading legitimate VOD stuff from Apple or Vudu, yet alone your torrentz, hitting 250GB in a month is not that far from reality. And now that Comcast has thrown their hat into the cap ring, it's not unlikely to assume other biggies will follow. Guhhhh.

Read more on how caps are killing us from Matt's recent Giz Explains on the topic.

[Comcast via Giga OM via DSL Reports]

Full Release and FAQs:

Announcement Regarding An Amendment to Our Acceptable Use Policy

It's no secret we've been evaluating a specific monthly data usage or bandwidth threshold for our Comcast High-Speed Internet residential customers for some time. Rumors circulated online last year and they popped up again in May.

In January, we added new frequently asked questions about what we consider acceptable use of our service to our online Help site www.comcast.net/help and Security Channel page www.comcast.net/security.

We've listened to feedback from our customers who asked that we provide a specific threshold for data usage and this would help them understand the amount of usage that would qualify as excessive. Today, we're announcing that beginning on October 1, 2008, we will amend our Acceptable Use Policy (AUP) available at http://www.comcast.net/terms/use/ and establish a specific monthly data usage threshold of 250 GB/month per account for all residential customers.

250 GB/month is an extremely large amount of data, much more than a typical residential customer uses on a monthly basis. Currently, the median monthly data usage by our residential customers is approximately 2 - 3 GB. To put 250 GB of monthly usage in perspective, a customer would have to do any one of the following:

* Send 50 million emails (at 0.05 KB/email)
* Download 62,500 songs (at 4 MB/song)
* Download 125 standard-definition movies (at 2 GB/movie)
* Upload 25,000 hi-resolution digital photos (at 10 MB/photo)

This is the same system we have in place today. The only difference is that we will now provide a limit by which a customer may be contacted. As part of our pre-existing policy, we will continue to contact the top users of our high-speed Internet service and ask them to curb their usage. If a customer uses more than 250 GB and is one of the top users of our service, he or she may be contacted by Comcast to notify them of excessive use. At that time, we'll tell them exactly how much data per month they had used. We know from experience the vast majority of customers we ask to curb usage do so voluntarily.

As stated above the new monthly data usage threshold will officially take effect starting October 1st. We are notifying customers in a number of ways. For example, we have posted a preview of the amended AUP as a PDF on this page. We are also running banner notices on our Comcast.net home page and on our Security Channel Web page to alert customers about this upcoming change. In addition, we have provided a number of FAQs that are available at http://help.comcast.net/content/faq/Frequently-Asked-Questions-about-Excessive-Use. Finally, we will also notify our customers directly by including an insert (also called a bill stuffer) in an upcoming monthly billing statement.

What is Comcast's approach to Excessive Use?

Comcast has an excessive use program to provide a high-quality service for all of its customers. The company uses reasonable network management practices that are consistent with industry standards. Comcast maintains an Acceptable Use Policy ("AUP") located at http://www.comcast.net/terms/use/ for its Comcast High-Speed Internet Service customers. The AUP discloses what constitutes unaccpetable conduct and uses of the service. The AUP includes requirements regarding data usage that all Comcast customers and users of the service must follow.

Comcast determines excessive usage in relation to typical residential uses of its service. The company does so in order to identify truly excessive use while not impacting the vast majority of Comcast customers - more than 99% - who use the service as intended.

Does Comcast use a monthly data usage threshold to determine excessive use?

Comcast will initiate a 250 GB monthly data usage threshold for all residential Comcast High-Speed Internet accounts. This threshold will be in place to provide a clear definition of what would constitute as excessive use of the service.

The new monthly data usage threshold will go into effect starting October 1, 2008.

Why is Comcast going to provide a monthly data usage threshold for its residential high-speed Internet users?

Comcast has been evaluating a monthly data usage threshold for quite some time and it has heard from high-speed Internet customers who have asked that it provide a specific number for excessive use. By providing a specific monthly data usage threshold, Comcast hopes to provide more clarification to its customers about what would qualify as excessive use.

When will the 250 GB monthly data usage threshold be put into effect?

Comcast will initiate the 250 GB monthly data usage threshold starting October 1, 2008.

What will happen if a customer exceeds 250 GB of data usage in a month?

The vast majority - more than 99% - of Comcast customers will not be impacted by a 250 GB monthly bandwidth or data usage threshold. If a customer exceeds more than 250 GB and is one of the heaviest data users who consume the most data on our high-speed Internet service, he or she may receive a call from Comcast's Customer Security Assurance ("CSA") group to notify them of excessive use. At that time, Comcast will tell the customer exactly how much data per month he or she had used.

If a customer surpasses 250 GB and is one of the top users of the service for a second time within a six-month timeframe, his or her service will be subject to termination for one year. After the one year period expires, the customer may resume service by subscribing to a service plan appropriate to his or her needs.

Will all customers who exceed 250 GB of data usage in a month be identified as excessive users?

Yes, Comcast is setting 250 GB as the residential data usage threshold for excessive use. Customers who exceed 250 GB and are among the top users of Comcast's high-speed Internet service may get contacted by Comcast about their excessive use.

Under the setup, Comcast claims it will figure out "in nearly real time'' who's causing congestion and if "in fact a person is generating enough packets that they're the ones creating that situation, we will manage that consumer for the overall good of all of our consumers,'' says Mitch Bowling, Comcast's senior vice president and general manager of online services.

The real time comment is interesting, because Comcast said the same thing about their targeted P2P slowdown technique, calling it "surgical" in its precision, but FCC Chair Kevin Martin said that wasn't true and that their system was "not even capable of knowing when an individual ... segment of the network is congested." So let's hope they've upgraded.

Either way, all indications show that this is likely just a first step toward overall usage caps, which appear to be an inevitability. What that means for the future of the internet is still unclear, but for now, heavy downloaders or people living in crowded houses might wanna look at alternate ISPs (if they're even able to). [Bloomberg via All Things D, Image via Biscuitsmlp]