Drop in Speed

Hello,

So I happen to run a speed test the other day on the BT wholesale website, I was initially getting about 72mbps but the new speed test shows I was getting around 40mbps. I contacted BT and they have said there is nothing wrong their end. I am a loss as to what the issue is.

I have an ASUS router connected to an OpenReach modem.

Thinks I have tried:

- Reset modem
- Reset router back to factory settings
- Connected computer directly to the router (its currently connection to switch).
- Connected computer directly to OpenReach modem (setup a PPOE connection).
- Disconnecting everything except my computer on the network.

Here are some stats from the OpenReach modem.

==
# xdslcmd info --pbParams
xdslcmd: ADSL driver and PHY status
Status: Showtime
Retrain Reason: 0
Max: Upstream rate = 37093 Kbps, Downstream rate = 98092 Kbps
Path: 0, Upstream rate = 19999 Kbps, Downstream rate = 79999 Kbps

Discovery Phase (Initial) Band Plan
US: (0,95) (868,1207) (1972,2783)
DS: (32,859) (1216,1963) (2792,3971)
Medley Phase (Final) Band Plan
US: (0,95) (868,1207) (1972,2783)
DS: (32,859) (1216,1963) (2792,3971)
VDSL Port Details Upstream Downstream
Attainable Net Data Rate: 37093 kbps 98092 kbps
Actual Aggregate Tx Power: - 0.3 dBm 12.4 dBm
============================================================================
VDSL Band Status U0 U1 U2 U3 D1 D2 D3
Line Attenuation(dB): 2.7 13.5 19.8 N/A 7.5 16.2 24.3

Signal Attenuation(dB): 2.7 12.6 18.7 N/A 7.5 16.2 24.3

SNR Margin(dB): 23.7 23.0 23.2 N/A 6.6 6.6 6.6

TX Power(dBm): -14.8 -30.2 -0.5 N/A 8.1 7.8 7.1

# xdslcmd info --show
xdslcmd: ADSL driver and PHY status
Status: Showtime
Retrain Reason: 0
Max: Upstream rate = 37069 Kbps, Downstream rate = 98092 Kbps
Path: 0, Upstream rate = 19999 Kbps, Downstream rate = 79999 Kbps

Link Power State: L0
Mode: VDSL2 Annex B
VDSL2 Profile: Profile 17a
TPS-TC: PTM Mode
Trellis: U:ON /D:ON
Line Status: No Defect
Training Status: Showtime
Down Up
SNR (dB): 6.6 23.2
Attn(dB): 0.0 0.0
Pwr(dBm): 12.4 -0.3
VDSL2 framing
Path 0
B: 57 237
M: 1 1
T: 64 42
R: 16 16
S: 0.0231 0.3781
L: 25665 5374
D: 1339 1
I: 74 127
N: 74 254
Counters
Path 0
OHF: 1297322 363129
OHFErr: 0 0
RS: 249085501 2359794
RSCorr: 8183 0
RSUnCorr: 0 0

Path 0
HEC: 0 0
OCD: 0 0
LCD: 0 0
Total Cells: 221750189 0
Data Cells: 6251240 0
Drop Cells: 0
Bit Errors: 0 0

ES: 0 0
SES: 0 0
UAS: 19 19
AS: 1442

Path 0
INP: 3.00 0.00
PER: 1.10 3.97
delay: 8.00 0.00
OR: 151.73 64.47

Bitswap: 183 0
==

Open TaskManager (assuming you are using Windows) and select Networking tab.

Run a speedtest here and at speedtest.net one after the other. Grab a screenshot of Task Manager and host that on Flikr, photobucket, tinypic or similar.


Provide links to the test results and image ...

Hello,

Here you go:

http://i59.tinypic.com/2ekqgsk.png
http://i58.tinypic.com/oid655.png
http://i59.tinypic.com/j7dfso.png

Thanks
Sam

Can you widen the screen to get both on one and also ensure it is scaled so the full extent can be seen

And links to the actual test results?

Hello,

I thought it best to do a video instead so here it is:

https://www.screenr.com/fvtN

Results:
http://www.thinkbroadband.com/speedtest/results.html...
http://www.speedtest.net/my-result/4105434082

Thanks
Sam

Hello,

Its really strange because from what I read the stats from the modem look good unless I am missing something.

-Sam

In reply to a post by ansam:

Hello,

Its really strange because from what I read the stats from the modem look good unless I am missing something.

So it isn't a sync speed (and thus a noise/SNR) issue, it seems to be throughput that is problematic which points at something further into the network, backhaul or possibly ISP gateways.

Edited by rippedcotton (Sun 01-Feb-15 21:28:25)

Yep the stats look ok - have you always connected to the router the same way, i.e. it looks like a USB3 gigabit ethernet adapter?

Hello,

No its a new laptop. I have a hardwired desktop though and seeing the same sort of stats.

-Sam

In reply to a post by ansam:

Hello,

No its a new laptop. I have a hardwired desktop though and seeing the same sort of stats.

I wasn't saying that the problem is in your devices or network.

My opinion is that there is a limitation somewhere in the connection back from your exchange to your ISP. It could be down to backhaul congestion or even some sort of mis-configuration in equipment out of your control.

You need to do some speed tests that use the BT speed tester and also 3rd party ones and see if there is a difference in the throughput, that could help to identify where the problem lies.