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drake178
Contributor
229 Views
Message 41 of 47

Re: Speed issues? Low upload speed?

MTBR = Mean Time Between Resyncs, how often you resync. I'd expect less attenuation at that distance. The errors in the router really don't mean anything, they are part of the technology designed to give you error-free data flow. They also have nothing to do with DLM. If you don't get disconnected or lose data over the network than they are working as intended.

 

Lowering your noise margin will improve your speed but will introduce more errors. If you're on Fast that may bad.

 

 

 

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Semmy
Contributor
216 Views
Message 42 of 47

Re: Speed issues? Low upload speed?

I am indeed on fast path.

 

So the noise margin reduction has been actioned however I am now a very confused bunny Smiley Frustrated

 

Attenuation and power levels unchanged both up and down stream.

Down stream noise margin down to 3db from 6db (as expected)

Downstream speed up to 15.3Mb/s from 13.4Mb/s (as expected)

Down stream errors accumulating at the same speed as before, so no impact on error rates (very good news)

 

However:-

Upstream margin now on 5.2db (very minor change from before)

Upstream speed unchanged at .744Mb/s (absolutely no change whatsoever)

Upstream errors also no change in the error rate

 

Surely an enforced 3db noise margin would be applied to both up and down stream?

Why is the upstream not playing ball?

 

Full stats below.....

 

Line state:
Connected
Connection time:
0 day, 02:32:58
Downstream:
15,373 Kbps
Upstream:
744 Kbps

ADSL settings
VPI/VCI:
0/38
Type:
PPPoA
Modulation:
G.992.5 Annex A
Latency type:
Fast
Noise margin (Down/Up):
3.0 dB / 5.2 dB
Line attenuation (Down/Up):
22.5 dB / 10.3 dB
Output power (Down/Up):
20.7 dBm / 12.1 dBm
FEC Events (Down/Up):
0 / 0
CRC Events (Down/Up):
102 / 287
Loss of Framing (Local/Remote):
0 / 0
Loss of Signal (Local/Remote):
0 / 0
Loss of Power (Local/Remote):
0 / 0
Loss of Link (Remote):
0
HEC Errors (Down/Up):
144 / 159
Error Seconds (Local/Remote):
0 / 223
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Highlighted
Semmy
Contributor
210 Views
Message 43 of 47

Re: Speed issues? Low upload speed?

As a little addon to this, I have just done the BTw Speed Test and got the following results:-

 

1. Best Effort Test:

 Download speedachieved during the test was - 14.1 Mbps  For your connection, the acceptable range of speeds is 4 Mbps-21 Mbps.  IP Profile for your line is - 13.56 Mbps

 

2. Upstream Test:

Upload speed achieved during the test was - 0.63Mbps  Additional Information:  Upstream Rate IP profile on your line is - 0.83 Mbps

 

So I have had a boost on the downstream but am still connecting at a higher speed than my Line profile.

Upstream has no change whatsover, identical numbers.......

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Semmy
Contributor
200 Views
Message 44 of 47

Re: Speed issues? Low upload speed?

Ah ha! We have a culprit at last!

 

Just had a very entertaining call with my old ISP (Virgin Media), according to their records due to line instability (a line fault since fixed) the upstream line speed was clamped! They have no record of this ever being cleared.........

 

Is it possible that this was actioned but never recorded at BTw, hence their records showing no line clamping having taken place?

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Distinguished Sage
193 Views
Message 45 of 47

Re: Speed issues? Low upload speed?

If your VM service used the BTw network it could be possible
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Semmy
Contributor
190 Views
Message 46 of 47

Re: Speed issues? Low upload speed?

Very possible John, it wasn't on LLU kit so would have been on BT infrastructure.

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Distinguished Sage
187 Views
Message 47 of 47

Re: Speed issues? Low upload speed?

Any thing is possible may be worth passing the information back to the Mod dealing with your case for investigation
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