Mentor
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33 Messages
AT&T Elite download speed increased from 6mbps to 8mbps
My AT&T Elite tier download speed was increased on August 27, 2014 from 6mbps to 8mbps [Download SyncRate (kbps) 8190]. All my speed test results using TestMy.net are stable an consisitent using different servers using various download file sizes from 12MB to 200MB with a 0-1% variance beginning to end over the entire download.
AT&T Uverse Tier 2 Tech Support in the Arizona call center told me that they may be improving the ADSL2+ Tier Packages for users. He also told me that he was not aware of any bulletins or information at this time.
As of yesterday 8/29 at 2:00pm through today 8/30 at 2:00pm CST the wait times for tech support have increased to 10-30 minutes.
Is anyone else on the forums noticing this, has experienced a speed bump or have any information?
Thanks,
Rob
mibrnsurg
Expert
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20.4K Messages
10 years ago
Pretty sure @baseballisback has VDSL2 Uverse HSI like me and the noise margin is the same 24 hrs/day like mine is at 22db.
Pretty much a situation for those of you on ADSL2+ IPDSLAM internet past the VDSL2 distance. 😉
Chris
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Please NO SD stretch-o-vision or 480 SD HD Channels
Need Help? PM ATT Uverse Care (all service problems) or
ATT Customer Care(all other problems)
Your Results May Vary, In My Humble Opinion
I Call It Like I See It, Simply a U-verse user, nothing more
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RRS1947
Mentor
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33 Messages
10 years ago
Update 9/4/2014 1130am
The AT&T Field Tech called me yesterday. I briefly and succinctly gave him my observations and data since the Downstream Sync Rate was increased to 8190kbps on 8/27-8/28. He said everyone on the edge or beyond the maximum distance from their central office (there are only three CO's located in my hometown) with ADSL2+ was experiencing the same issue. Without coming to my house he changed my port back to the Downstream Sync Rate of 6013kbps and double checked my line stats for issues. He then came to my house and we discussed the phenomenon. The SN Margin immediately went back to 13.4 to 14. Last night between 7pm to 12am it went no lower than 12.5. Netflix streamed the 1080p HD 4300kbps flawlessly. No sync loss/line drops. CRC Errors are 0. FEC Errors 396. Compare to my Broadband Status earlier in this thread on August 30th.
He noted that the real world data; distance from the CO, copper wire conditions and customer's preferred Downstream Sync Rate is rarely a factor when a decision is made to change ports for what Corporate decides is better for the subscriber.
As I posted earlier in this thread "New and Improved" is a tried and true marketing tool. Also a faster speed is meaningless without stability.
Rob
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baseballisback
ACE - Professor
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7.7K Messages
10 years ago
I just got 7.14 down.
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RRS1947
Mentor
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33 Messages
10 years ago
Appling the below to my particular situation (ADSL2+) with the 2Mbps increase and a SN Margin of 8.4 at it's best the following may be old news to some, interesting to some, and downright irritating to others. However it has been helpful to me and colleagues in applying Ockham's razor to various situations. The below quoted information is not by me in origin or did I author it. I do not have the original sources and authors of this information. Though I believe it is a combination of information from DSLReports, Kitz, and Speedguide.net.
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"Signal to Noise Margin:
Noise margin (in circuits) is the amount of noise that a circuit can withstand. Noise margins are generally defined so that positive values ensure proper operation, and negative margins result in compromised operation, or perhaps outright failure The choices the DSL modem make can also be either conservative, where the modem chooses to allocate fewer bits per bin than it possibly could, a choice which makes for a slower connection, or less conservative in which more bits per bin are chosen in which case there is a greater risk case of error should future signal-to-noise ratios deteriorate to the point where the bits-per-bin allocations chosen are too high to cope with the greater noise present. This conservatism, involving a choice of using fewer bits per bin as a safeguard against future noise increases, is reported as the signal-to-noise ratio margin or SNR margin. The telephone exchange can indicate a suggested SNR margin to the customer's DSL modem when it initially connects, and the modem may make its bits-per-bin allocation plan accordingly. A high SNR margin will mean a reduced maximum throughput, but greater reliability and stability of the connection. A low SNR margin will mean high speeds, provided the noise level does not increase too much; otherwise, the connection will have to be dropped and renegotiated (resynced). ADSL2+ can better accommodate such circumstances, offering a feature termed seamless rate adaptation (SRA), which can accommodate changes in total link capacity with less disruption to communications."
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"SN Margin:
Higher numbers represent cleaner signals, with less noise. In some instances interleaving can help raise the noise margin to an acceptable level.
6dB or below noise margin is bad, it will experience no synch or intermittent synch problems
7dB-10dB is fair but does not leave much room for variances in conditions
11dB-20dB is good with little or no synch problems (if no large variation)
20dB-28dB is excellent
29dB or above is outstanding"
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"Line Attenuation:
Measure of how much the signal has degraded between the DSLAM and the modem. Maximum signal loss recommendation is usually about 60dB. One of the biggest factors affecting line attenuation is distance from the DSLAM. Generally speaking, bigger distances mean higher attenuation. The lower the dB the better for this measurement.
20dB and below is outstanding
20dB-30dB is excellent
30dB-40dB is very good 40dB-50dB is good
50dB-60dB is poor and may experience connectivity issues
60dB or above is bad and will experience connectivity issues" _________________________________________
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Tigereyze209
Professor
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3.9K Messages
9 years ago
I was downloading a big file (5 gb) last week, and I have a usage app on my system to keep track of data usage on my fast express 6 mbps legacy DSL connection, and while most of the time, my max line speed is way short of the 6 mb speed limit, during the download, the throughput showed as high as 14 mbps.
I figured the app was just misreading the data flow, but now, I am starting to wonder if at&t just might be allowing faster than advertised connection speeds.
Technicaly, my modem CAN support up to 20 mbps connections (adsl2+ modem) but the line is only 6mbps.
Great if true... and it's not really a bad thing if the customer actualy gets a bit more than what they paid for.
One can dream anyways.
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HM_751
Tutor
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12 Messages
8 years ago
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