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I have been having slow download speeds for over a month. My upload speed is fine. I have contacted support several times. In each case my call has been disconnected and they never call back. The following is from result of a speed test from 12-12 using Verizon's speed test:
Web100 reports the Round trip time = 52.08 msec; the Packet size = 1452 Bytes; and
There were 73 packets retransmitted, 3 duplicate acks received, and 2 SACK blocks received
The connection stalled 3 times due to packet loss
The connection was idle 0.8 seconds (5.33%) of the time
This connection is sender limited 9.73% of the time.
This connection is network limited 90.27% of the time.
Excessive packet loss is impacting your performance.
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Thanks for the response Smith6612
Link to the test results is below:
http://www.dslreports.com/testhistory/1774641/77c2b
I am not using a wireless connection. I made no system or equipment changes prior to the start of this problem. I am on a Westell 2200 modem which shows the proper connection rate.
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Speakeasy results as follows:
NY - 1221kbps down 685 kbps up
Chicago - 1877kbps down 688 kbps up.
I am running Windows XP Pro SP3.
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Set the TCP Receive Window to 13068, or to a number with a multiple of 1452 not lower than 13068.
Set Windows Scaling to Default or No
Set Time Stamping to No
Set Selective Acks to Yes
Set Path MTU Discovery to Yes
Set black Hole Detection to No
Press Save and reboot your PC. Perform a speed test to see if any speed gain has been achieved.
Realistically, based on what speed package you have, 3Mbps should max out at ~2800kbps, if you're lucky 2900Kbps. 5Mbps will max out at a little under 5000Kbps, and the 7.1Mbps package will max out at roughly 6500kbps.
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You are right, I am suppose to have 3Mbps and I was getting between 2800 and 2900 Kbps all the time before.
Downloaded the program and made a couple of attempts. One with the TCP Receive Window at 13068 and the other with TCP Receive Window at 65340. The latter produced the best speeds but only 2036Kbps at NY and 2406Kbps at Chicago.
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Under normal circumstances, if there wasn't this issue with the Juniper ERX routers and some Lucent Switches on Verizon's end, something that has been known for years as I mentioned earlier for trashing line quality (we've attempted to let Verizon know as well, they haven't done a whole lot about it), you should be able to get the max speeds all the time with any reasonable Receive Window value. I happen to know that my DSL line runs through the affected Lucent equipment as I am on a Litespan Remote, though fortunately for me I am still on one of the few Redback/Cisco edge routers left in operation for my area meaning I don't see this issue. I'd be stuck out in the cold if I were on a Juniper ERX as my primary PCs run Vista and Windows 7. These operating systems adjust the TCP Receive Window automatically and do not let me manually set a value. A friend of mine feeding out of the same remote down the street from me has 3Mbps DSL (used to have 768k) and he happened to land on a Juniper ERX. Of course, regardless of his speed package, his throughput is basically completely trashed despite there being no congestion. I'm going to be getting someone with the power to change things around a bit to fix his line up so he can actually download things without having it run at 40KB/s-160KB/s most of the time. It's rare to see times where his line can pull over 190KB/s, mostly FTP transfers which are far and few. Most downloads on his line are via Xbox Live, Steam and HTTP. It's sad when my 1Mbps line is smoking his 3Mbps line in speed, yet his line has a stronger signal coming in. He knows what the problem is thanks to what I've told him, and there are a ton of others in my area affected by the same problem and don't even know it.