Sync Drop

[Billy]

My downstream sync rate keeps dropping.

Uptime: 0 days, 0:01:29
DSL Type: G.992.5 annex A
Bandwidth (Up/Down) [kbps/kbps]: 1,395 / 10,017
Data Transferred (Sent/Received) [kB/kB]: 0.00 / 0.00
Output Power (Up/Down) [dBm]: 12.0 / 19.0
Line Attenuation (Up/Down) [dB]: 17.0 / 37.0
SN Margin (Up/Down) [dB]: 3.5 / 3.5
Vendor ID (Local/Remote): TMMB / BDCM
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
Error Seconds (Local/Remote): 0 / 0

It was synced at 14mb yesterday with a noise margin of 3db, since then its been dropping more and more every time i re-sync It used to stay at 13-14mb constantly for like 2weeks now its droppinge every time i reboot my rooter, Im on o2 prem' package i got my sn margin lowered from 6 to 3 to get more speed from my line.

Is there anyway to get it back up and to get it to stick their.

Also will a new router give me a better sync rate i was thinking of getting a DG834n

[Saturday]

It can't be long before O2 stop lowering the noise margin on request.

It's 6db by default for a reason. Lower it to 3db and you have very little slack to allow for normal fluctuations in line noise. Yes, you will get a higher sync with 3db but if the noise margin drops a little more your line errors will rise, your ping will rise and your throughput will drop.

Reboot your router repeatedly in the evening and your sync will be lower each time as background line noise rises - that's how ADSL works.

[Billy]

My pings always 22-24 no matter when i check it..

but during day sync rate gets up to 10,400 ish when i reboot

And using routerstats, I've worked out line fixes on 3.5db constantly and some times drops to 3db but never lower..

Do you think a change to a newer router will up my sync rate and help hold it their..

Currently got a thompsan 585v7 and want to upgrade to a dg834n

[samperry209]

Possable

Depends on your sync stats and wheather its worth it?

I mean 37db your syncs are correct between 9-10Meg with posable hit as high as 12Meg

Tbh Saturday is right O2 will probs clamp down on the noise margin request

I personally got a slapped wrist at my old house and yes i feel your fustrating with loss of speed but its not like your mega slow?

I used to have 2Mb speeds at my old house because i asked for my noise margin to be put at 3db on a 5km line LOL...Imagine that? Trust me wasn't fun downloading playstation updates and windows service packs... and it was as stable as driving a car on a tightrope

And even if you sync at 10,400 you will only have around 80-83% of that

[Billy]

It dropped even more now for some reason

Uptime: 0 days, 4:59:48
DSL Type: G.992.5 annex A
Bandwidth (Up/Down) [kbps/kbps]: 1,382 / 5,492
Data Transferred (Sent/Received) [kB/kB]: 0.00 / 0.00
Output Power (Up/Down) [dBm]: 12.0 / 19.0
Line Attenuation (Up/Down) [dB]: 17.0 / 37.0
SN Margin (Up/Down) [dB]: 3.5 / 4.5
Vendor ID (Local/Remote): TMMB / BDCM
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
Error Seconds (Local/Remote): 0 / 0
FEC Errors (Up/Down): 109 / 322,798
CRC Errors (Up/Down): 109 / 3
HEC Errors (Up/Down): 5,861 / 2

I dont know why its moving so much, When i had sky broadband the line was holding a steady 14-15mb..

[Saturday]

Originally Posted by Billy

I dont know why its moving so much

I do, there can only be one reason: your line condition is deteriorating (note, line includes everything from the exchange equipment through to your router).

First off, to determine whether the problem is local or remote, plug your router into your master socket test socket (hidden inside the master assuming you have an NTE5) using just the supplied router cable and a filter - nothing else at all plugged in. Check your sync. Now swap for a different filter and repeat. What's the sync now?

[Billy]

Uptime: 0 days, 0:01:04

DSL Type: G.992.5 annex A

Bandwidth (Up/Down) [kbps/kbps]: 1,382 / 9,593

Data Transferred (Sent/Received) [kB/kB]: 0.00 / 0.00

Output Power (Up/Down) [dBm]: 12.0 / 19.0

Line Attenuation (Up/Down) [dB]: 17.0 / 37.0

SN Margin (Up/Down) [dB]: 3.5 / 3.5

Vendor ID (Local/Remote): TMMB / BDCM]

Stats now after rebooting, Will try test socket in 2mins, And Lines only 1.5years old its a new thick line, had to pay an extra 100quid to get a good quality line

[Billy]

Uptime: 0 days, 0:00:06
DSL Type: G.992.5 annex A
Bandwidth (Up/Down) [kbps/kbps]: 1,382 / 10,750
Data Transferred (Sent/Received) [kB/kB]: 0.00 / 0.00
Output Power (Up/Down) [dBm]: 12.0 / 18.5
Line Attenuation (Up/Down) [dB]: 17.0 / 37.0
SN Margin (Up/Down) [dB]: 3.5 / 3.0
Vendor ID (Local/Remote): TMMB / BDCM
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
Error Seconds (Local/Remote): 0 / 0
FEC Errors (Up/Down): 0 / 0
CRC Errors (Up/Down): 0 / 0
HEC Errors (Up/Down): 0 / 0

Just rebooted router whislt it was plugged in wired, When using wireless and i reboot the router its always syncs alot lower.

[Billy]

Uptime: 0 days, 0:00:08
DSL Type: G.992.5 annex A
Bandwidth (Up/Down) [kbps/kbps]: 1,390 / 11,916
Data Transferred (Sent/Received) [kB/kB]: 0.00 / 0.00
Output Power (Up/Down) [dBm]: 12.0 / 18.5
Line Attenuation (Up/Down) [dB]: 17.0 / 37.0
SN Margin (Up/Down) [dB]: 3.5 / 3.0
Vendor ID (Local/Remote): TMMB / BDCM

Once i rebooted router with ethernet plugged in

[Saturday]

Very odd - your sync is now back to normal levels for your attenuation.

Normally, a big increase in sync following a reboot (with noise margin unchanged) is indicative of line noise having previously made a number of frequency bins unavailable for use. Rebooting in effect reallocates the frequencies/bins making more bandwidth available and so higher sync. Over time the noise frequencies will "corrupt" bins again and so sync will slowly degenerate (please forgive the use of non technical terms I'm trying to keep it simple).

This could be what is happening here though the extra info you've added about the sync being lower/worse when using wireless makes me wonder if you have a router fault - possibly a router power supply fault.

To be clear, without rebooting, does plugging in an ethernet cable make an immediate difference? Is it turning wireless on or off in the router that changes sync or is it when you actually transfer data wirelessly?

Or are the changes only apparent after rebooting?

Lastly, is the router hot to the touch?