Speed Thread (Before and after transfer speed comparisons)

[#1]

It's probably more worthwhile looking at your sync speeds rather than throughput as they don't reply on profile changes.

[#2]

Observation here is that sync speed is fastest on ADSL 1 on my line. I normally had about 59.5dB atten and 10dB S/N at 3392 syncin the past (pre 21CN) and now have 56dB atten and 10dB S/N.
Using ADSL2 or 2+ just gives me lower sync speeds both up and down link. However the ADSL 1 sync rate is much better than it was at 4128  with lower atten (56dB at 10dB S/N).
Conclusion ADSL 1 is best for long lines, but 21CN did improve something here never the less.

[#3]

Do you mean this speed from the router ?
Incoming: 8000 kbps
• Outgoing: 1056 kbps

[#4]

Quote from: greyposter

Incoming: 8000 kbps • Outgoing: 1056 kbps

Do you know what it was before?

[#5]

Sorry,meant to record but got side tracked (phone line went dead) It wasn't much lower for download but about 380 for upload.

[#6]

My SN Margin and Sync Speed figures have been as follows:
Immediately after switchover (at about 12:10):
SN Margin (Up/Down) [dB]: 8.0 / 6.0
Bandwidth (Up/Down) [kbps/kbps]: 1,000 / 12,211
After manually rebooting the router due to SN Margin Down dropping to 5.0dB (at about 14:40)
SN Margin (Up/Down) [dB]: 8.0 / 6.5
Bandwidth (Up/Down) [kbps/kbps]: 992 / 11,530
After router losing connection and reconnecting automatically (at about 15:00):
SN Margin (Up/Down) [dB]: 8.5 / 6.0
Bandwidth (Up/Down) [kbps/kbps]: 992 / 11,315

After router losing connection and reconnecting automatically (at about 16:20):
SN Margin (Up/Down) [dB]: 8.5 / 6.0
Bandwidth (Up/Down) [kbps/kbps]: 976 / 11,068
I suspect as the afternoon and evening draws on and the downstream SN Margin figures fall there will be a few more disconnects until the line stabilises.

[#7]

Quote from: gm4jjj

Conclusion ADSL 1 is best for long lines, but 21CN did improve something here never the less.

This is using the SAME router before and after the change to your 21CN connection?
Can you tell you router to go back to ADSL1 only and get the same speeds back again?
On a long line, do you find the sync speed changes during the day and night without any disconnects?
SW.

[#8]

pnf - You should be able to see a bit more now on a speed test if you disconnect and reconnect, BT have you on a 9000kbps BRAS profile so I've just increased that our side but you need to disconnect/reconnect for the change to take effect.
greyposter - same, I just increased the speed profile our side to match BT's, if you disconnect/reconnect you should see an increase in speed.

[#9]

Quote from: Oldjim

This is what it looks like on my DG834G which uses the same chipset as the GT Edit - I enable debug mode so that may be the difference http://192.168.0.1/setup.cgi?todo=debug

Thanks Oldjim - I don't understand the debug option as it bypasses the web menu.
Anyway, I've finally kicked the family off and upgraded the firmware - no apparent differences.
Firmware was gotten from http://kbserver.netgear.com/products/DG834GT.asp
Was forced to use a Windows laptop, so I was able to use DMT to look at frequencies.
This showed that the router does actually recognise ADSL2+ ...
Note the text "ShowtimeRetrain Reason: 8000"

Quote

Down            Up G.dmt framing K:              127(0)          14 R:              10              16 S:              1              8 😧              64              8 ADSL2 framing MSGc:          62              10 B:              126            13 M:              1              8 T:              2              9 R:              10              16 S:              0.4763          4.0000 L:              2301            256 😧              64              8 .....

See attachment...

[#10]

Quote from: dave

pnf - You should be able to see a bit more now on a speed test if you disconnect and reconnect, BT have you on a 9000kbps BRAS profile so I've just increased that our side but you need to disconnect/reconnect for the change to take effect. greyposter - same, I just increased the speed profile our side to match BT's, if you disconnect/reconnect you should see an increase in speed.

Today 19:57 7107 kbps (888kB/s) 869 kbps (109kB/s)
Today 17:26 6021 kbps (753kB/s) 782 kbps (97.8kB/s)

[#11]

Quote from: dave

pnf - You should be able to see a bit more now on a speed test if you disconnect and reconnect, BT have you on a 9000kbps BRAS profile so I've just increased that our side but you need to disconnect/reconnect for the change to take effect. ...

Thanks Dave.  I've rebooted my router and can confirm that my IP profile is now 9000 kbps. 
Since going over to ADSL2+ I have been unable to use the BT speedtester as it reports the following each time I try:
    System Error
    The system is currently busy.  Please try again shortly, however if this problem persists, raise the issue with your service provider.
However, the following speedtests, using www.mybroadbandspeed.co.uk, were carried out today and show how the transition has gone so far:
ADSL1:
Thu 04/12/2008 11:40 - IP Profile 7000 kbps  Actual Throughput Up/Down: 374/6048 kbps
ADSL2+:
Thu 04/12/2008 13:00 - IP Profile 7000 kbps  Actual Throughput Up/Down: 836/6581 kbps
Thu 04/12/2008 13:40 - IP Profile 7000 kbps  Actual Throughput Up/Down: 836/6576 kbps
Thu 04/12/2008 15:40 - IP Profile 7000 kbps  Actual Throughput Up/Down: 829/6580 kbps
Thu 04/12/2008 19:30 - IP Profile 9000 kbps  Actual Throughput Up/Down: 836/8466 kbps
Thu 04/12/2008 20:10 - IP Profile 9000 kbps  Actual Throughput Up/Down: 835/8463 kbps

[#12]

Quote from: godsell4

Quote from: gm4jjj Conclusion ADSL 1 is best for long lines, but 21CN did improve something here never the less. This is using the SAME router before and after the change to your 21CN connection? Can you tell you router to go back to ADSL1 only and get the same speeds back again? On a long line, do you find the sync speed changes during the day and night without any disconnects? SW.

SAME router
Yes I can switch my router between ADSL1 ADSL2 and ADSL2+ using DMT tool and get the results I outlined consistently.
Certainly in the past pre 21CN my router could resync without losing connection sometimes.  My previous router DG834G used to struggle at night with poor S/N , but this Netgear DG834N is much better and doesn't show much change in S/N day or night.
PS
I see PN/BT have put my BRAS profile up to 3500 and I am getting up to 3000 down on Speed Test tonight.

[#13]

Okay, there seems to be a trend here so here's my two pen'orth.
Tonights test pre modem reset.

and after switching off the modem for around 10 minutes then back on I got this

I too have a Netgear DG834n with the latest firmware.

[#14]

.... and the modem says this:-

[#15]

Previous sync: around 7768Kbps and a 6500Kbps profile

Current sync: 8875 kbps and a profile of around 8000Kbps
However, browsing feels more sluggish now than previously - is there a reason for this?