Slow speed

Hi. Not sure if anyone can help but have had a couple of issues with speed on my line both of which BT says are sorted. I used to get speeds of about .900 now only getting about 700mbps.
Router stats:
Line state: Connected
Connection time: 2 days, 10:22:27
Downstream: 1,056 Kbps
Upstream: 448 Kbps

ADSL settings

VPI/VCI: 0/38
Type: PPPoA
Modulation: G.992.1 Annex A
Latency type: Interleaved
Noise margin (Down/Up): 9.9 dB / 11.0 dB
Line attenuation (Down/Up): 63.5 dB / 31.5 dB
Output power (Down/Up): 16.3 dBm / 12.0 dBm
FEC Events (Down/Up): 961010 / 2221
CRC Events (Down/Up): 8494 / 1225

speedtester.bt.com:
0.69 mbps max acheivable speed 1mbps
dsl connection rate:1.06 down 0.45 up
ip profile for line is 0.75mbps

Any ideas?

Probably had a 6dB target margin before, which would give around 1.2Meg connection and 1 Meg IP profile.

You appear to have a 9dB margin, which slows you down but makes like more reliable, particularly as it looks like it does experience noise bursts (based on the FEC figure)

Thanks for the reply. It is being suggested that the fault lies with my computer software now.

Is there anything I can do to change the speed or is it best left alone?

Thanks

Nothing to do with your computer software, but all to do with you having a very long telephone line, i.e. live a long way from the telephone exchange.

dsl connection rate:1.06 down 0.45 up

Is the key figure, and that is independent of your PC. To have got the speeds you had before this would have been higher, and the figures you posted have a good reason why.

ADSL is NOT a fixed speed service, so does vary up and down in speed. We tend to notice the dips more obviously. The automatic systems appear to have seen enough errors to slow you down, if these errors on the phone line go away then the speed might come back.

Basically stop listening to the waffle from support.

In reply to a post by ploddo:

Thanks for the reply. It is being suggested that the fault lies with my computer software now.

Is there anything I can do to change the speed or is it best left alone?

Thanks

It's best left alone.

As MrSaffron says, the system has automatically raised the noise margin by 3dB because of some noise bursts or other instability. Possibly a thunderstorm?

If things are stable for 10-14 days, then it may reduce that noise margin by 3dB again, and you will get your speed back.

You may or may not know that a connection made well within daylight hours tends to be faster that any other time. So a single reconnection may get you to 1152kbps. But don't do several as that will be taken as instability and restart that 10-14 day wait. As long as the new connection is 864kbps or higher you will still get the .75 IP Profile.

If you do luckily get 1152kbps or more, in four or five days from that I would expect the IP Profile to rise to 1Mbps, which is probably what it was before.

Anything higher than 1152kbps but lower than 1440kbps doesn't give you any extra speed or a higher IP profile, so in fact 1152kbps is your optimum sync. The higher the sync the more errors there are, so the higher the chance of the DLM system upping the noise margin again.

I've a few pages about the subject on my website - see my sig. DLM, Noise margin and BT IP Profiles >> Old BT Wholesale are the ones. Also have a browse through my Troubleshooting section, in particular the Ring/Bell Wire and Miscellaneous Nasties pages. You might find something that you can do to improve the stability and speed of your line.

Many thanks for the information. BT have apparently done a reset and will be phoning me on Monday after a few days of monitoring. As you mention it, we did have a storm a week or two ago so maybe I will be lucky and get a bit of speed back in time. Possibly that is what caused the first two errors at the exchange/box too. I will take a look at your site in the meantime

If they have done a reset time to look at the router stats to see if anything has changed.

ADSL Line Status
Connection information
Line state: Connected
Connection time: 3 days, 03:34:36
Downstream: 1,056 Kbps
Upstream: 448 Kbps

ADSL settings

VPI/VCI: 0/38
Type: PPPoA
Modulation: G.992.1 Annex A
Latency type: Interleaved
Noise margin (Down/Up): 9.8 dB / 11.0 dB
Line attenuation (Down/Up): 63.5 dB / 31.5 dB
Output power (Down/Up): 16.3 dBm / 12.0 dBm
FEC Events (Down/Up): 987124 / 3258
CRC Events (Down/Up): 11079 / 1959

Not much different - but I'm not sure how to interpret them

these were the stats on 4th September:
Line state: Connected
Connection time: 1 day, 19:14:20
Downstream: 1,088 Kbps
Upstream: 448 Kbps

ADSL settings

VPI/VCI: 0/38
Type: PPPoA
Modulation: G.992.1 Annex A
Latency type: Fast
Noise margin (Down/Up): 7.0 dB / 10.0 dB
Line attenuation (Down/Up): 63.5 dB / 31.5 dB
Output power (Down/Up): 16.6 dBm / 12.0 dBm
FEC Events (Down/Up): 0 / 12
CRC Events (Down/Up): 2901 / 945

No sign of a margin reset, but then they also need to force a router reboot for that to take effect.

Connection time: 3 days, 03:34:36

They have probably just reset the IP Profile or MSR recording, and NOT the target noise margin. Wait till daylight on Friday and give the router a single reboot if the connection time has reset itself over night.

From what I've seen re a few ISPs doing resets Andrew, it looks like there can be an up to 24-hour delay or so for BTW to action it. I've no idea why.

Maybe it had already been done. We had no electricity on the 21st and I haven't rebooted the router since then. It is still showing as connected for 3 days + today and BT have told me not to reboot it. They are going to phone me back on Monday evening, so I guess I will have to wait for that. Living in the sticks sucks sometimes!

Took this at midday today:

ADSL Line Status
Connection information
Line state: Connected
Connection time: 3 days, 23:09:03
Downstream: 1,056 Kbps
Upstream: 448 Kbps

ADSL settings

VPI/VCI: 0/38
Type: PPPoA
Modulation: G.992.1 Annex A
Latency type: Interleaved
Noise margin (Down/Up): 9.7 dB / 11.0 dB
Line attenuation (Down/Up): 63.5 dB / 31.5 dB
Output power (Down/Up): 16.3 dBm / 12.0 dBm
FEC Events (Down/Up): 999785 / 3809
CRC Events (Down/Up): 11330 / 2235
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): 47714 / 1500
Error Seconds (Local/Remote): 0 / 0

If you don't reboot an ADSL modem it will stay with whatever settings it is happily running at until such time as the connection breaks due to noise or a power cut.

Waiting till Monday, sounds very like they are saying five days because that is the longest time the IP Profile takes to update, and NOTHING to do with target noise margin resets. Usual support guff

modem stats at 19.37 28/09/12

ADSL Line Status
Connection information
Line state: Connected
Connection time: 0 day, 06:47:55
Downstream: 1,440 Kbps
Upstream: 448 Kbps

ADSL settings

VPI/VCI: 0/38
Type: PPPoA
Modulation: G.992.1 Annex A
Latency type: Interleaved
Noise margin (Down/Up): 6.2 dB / 11.0 dB
Line attenuation (Down/Up): 63.5 dB / 31.5 dB
Output power (Down/Up): 17.0 dBm / 12.1 dBm
FEC Events (Down/Up): 5518 / 385
CRC Events (Down/Up): 134 / 112
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): 688 / 43
Error Seconds (Local/Remote): 0 / 0

IP Profile should catch up at some point if you can hold this speed now

Basically you look to be back to a 6dB target noise margin now

That's excellent.

As Andrew says, it looks as though the margin has been reset. Not only that, but you've even managed to reach 1440kbps sync, which in a few days will get you a 1250kbps IP Profile.

Keep the router switched on, even if you turn the computer off .

Latest stats!

ADSL Line Status
Connection information
Line state: Connected
Connection time: 3 days, 00:09:55
Downstream: 1,440 Kbps
Upstream: 448 Kbps

ADSL settings

VPI/VCI: 0/38
Type: PPPoA
Modulation: G.992.1 Annex A
Latency type: Interleaved
Noise margin (Down/Up): 6.2 dB / 11.0 dB
Line attenuation (Down/Up): 63.5 dB / 31.5 dB
Output power (Down/Up): 17.0 dBm / 12.1 dBm
FEC Events (Down/Up): 67068 / 1461
CRC Events (Down/Up): 1249 / 644
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): 7967 / 357
Error Seconds (Local/Remote): 0 / 0

And speed!

Download speedachieved during the test was - 1.14 Mbps
For your connection, the acceptable range of speeds is 0.4 Mbps-2 Mbps.
Additional Information:
Your DSL Connection Rate :1.44 Mbps(DOWN-STREAM), 0.45 Mbps(UP-STREAM)
IP Profile for your line is - 1.25 Mbps

Hasn't been that good since before I changed to BT last October, hope it holds

Perfect.

If you are wondering about the error rates, those are very good as well.

Thanks