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reply to dlewis23

Re: Speed Upgrades Coming

Looks like at&t is using a combination of technologies to bring higher speeds to U-Verse. The first technology at&t will be using is pair bonding. Currently pair-bonding is being used to extend the range of the current network, but now it will also be used to increase the speeds of customers closer to the VRAD. With pair bonding comes the phenomenon called cross talk which can drastically reduced data throughput of the bonded lines and other neighboring pairs. To mitigate this, at&t will be vectoring the lines reduce the amount of interference. This will be done by simply changing out a few line cards at the VRAD and some software updates to the RG/iNID to make them vectoring ready. Thus, when at&t completes the upgrade, youll notice more reliability of your connection increase as well as you max sync rate increase 100-150% of what you have now. If you ever looked at your bit loading graphs on Uverse realtime, youll notice your signal is carried out on a range of frequencies up to 8.832Mhz. at&t will be increasing the frequencies the modems can use for uploads/ downloads up to 17.664Mhz which will allow additional data throughput in conjunction with vectoring of the lines. In addition, if you've ever seen the bit loading graph, you notice the downstream frequencies are colored yellow while the upstream frequencies are colored green. Using rate-adaptive technology, your modem will dynamically reduce/increase the amount of line spectrum your downstream and upstream spectrum you can use and also selecting which frequencies are best for your upstream and downstream. What this means is that when you need additional uploading power, your modem can allocate additional spectrum to increase the upload throughput by "borrowing" the downstream frequencies. So this might hurt if you are downloading and uploading at the same time, but if you're doing one at a time, this means upload speeds could potentially be much higher than what they are currently.

For FTTN customers, this means speeds at 75mbps and 100mbps while for IPDSLAM customers this means 45mbps for most customers and 75mbps for customers close to the CO/RT


Thanks for sharing this info, it was pretty neat to read about some of the upcoming technology that hasn't already been discussed here.


reply to scotsclic
Pair bonding has been around since 2010 in the field. It is a very hit and miss when it comes to the outside plant. It varies from VRAD to VRAD in every city. I have installed this in many different cities and generally the pair bonding is used when the customer is approx 3K from the VRAD. I installed many single pair INids in San Antonio because that was the practice there. This is because the outside plant was subpar. This does not even start to factor in that 75% of the techs cannot complete an install on their own that actually works with no problems. It usually takes 2-4 revisits after the initial install to straighten out.

Pair bonding is far from the fix for UVerse, their best bet would be to segregate the video from the data on different pairs, or actually use the new feeds that are installed all over the US and just acting as bird stands for now.

It would work for the IPDSL customers but its not likely to happen anytime soon.

They won't do a thing until this contract negotiation is done, so keep wishing in one hand and do whatever you like with the other.

Orange, CA
reply to scotsclic
said by scotsclic :

For FTTN customers, this means speeds at 75mbps and 100mbps while for IPDSLAM customers this means 45mbps for most customers and 75mbps for customers close to the CO/RT

What all of this WON'T do however.... is increase the upload.

AT&T will try to tell you that 5 Mbps upload is the best thing since sliced bread, and that no one should need more..... but the reality is that more and more applications send data (photo/video/backup/work-vpn/etc) FROM the home to the world, instead of only receiving it.

I work from home a few days a week on the 24/3 plan. Yeah, it is do-able..... but sometimes I get a 40 MB Spreadsheet I need to add a few things to, and downloading it from our Sharepoint is one thing.... uploading it back up to the the server is a SLOW SLOW process.

(And yes: The company has 10s of Gigibits of bandwidth all over the world, we're.... kinda big.)

Some providers are starting to tackle the upload.... FIOS already has, and cable providers are starting to use bundled upstreams to provide more upstream capacity.

But where is AT&T in all this? No where to be found.... Although Bill Gates never said this, it does remind me of the false quote attributed to him: 640 Kb ought to be enough for everybody.

Only now it is AT&T saying that 5 Mbps upload is enough for everybody.
"I reject your reality and substitute my own!"