Attainable rate has dropped from 88999 / 30000 to 46818 / 19

My attainable sync has droped from 88916 / 30000 to 46818 / 19407 ???? my noise margin is also lower this was the response from isp :

The circuit has been tested and the results are as follows :

Problem Explanation: [EPP508] No performance issues have been identified in the BTW network.
Resolution/Recommendation: Please follow your diagnostic procedures to resolve the fault.

GEA Test - 30M-60M Downstream, Interleaving Off - 10M-20M Upstream, Interleaving Off

The GEA test passed indicating no issues however the circuit appears to be banded. As no fault has been found on the circuit, it is advised to power cycle all the equipment connected to the line including the VDSL modem for a period of 15-20 minutes and retest.

Nothing has changed my end so what gives ?

Edited by truex360 (Tue 12-Jun-12 17:27:19)

A significant noise event occurred which has resulted in certain tones being identified as unusable and they remain marked in that way. If te noise source has disappeared, the 30 minutes downtime will let the equipment reset any flags and start from fresh.

Do as suggested - turn off for 30 minutes whilst also disconnecting modem from line, and removing modem to router connection. Then bring all items up and wait for two minutes to allow them to settle. Connect modem to line and wait for 1 minute to ensure sync, then connect modem and router.

i have tried this for more than 30 mins does not reset

before

[IMG]http://i713.photobucket.com/albums/ww132/truex360/mo...[/IMG]

after

[IMG]http://i713.photobucket.com/albums/ww132/truex360/12...[/IMG]

.

Edited by truex360 (Tue 12-Jun-12 19:38:25)

So what do the tone loading plots look like?

how do i gather these

Edited by truex360 (Tue 12-Jun-12 22:47:49)

In the instruction set for gaining access to teh modem by reflashing there are further instructions on how to get full stats and line data from the device.

[IMG]http://i713.photobucket.com/albums/ww132/truex360/tx...[/IMG]

[IMG]http://i713.photobucket.com/albums/ww132/truex360/pr...[/IMG]

[IMG]http://i713.photobucket.com/albums/ww132/truex360/al...[/IMG]

Edited by truex360 (Tue 12-Jun-12 22:47:26)

You need another users data to compare it with (my hacked modem is on loan) but I feel that the bit loading is low in D1 ... and there is a horrible notch at the low frequency end of D1.

It suggests that there may still be noise causing a problem on the line ... but you need a comparison.

but wouldnt the gea test failed if there was constent noise on the line ? is it just stuck an i need an engineer vist to reset the my profile back to what it was or do i just wait it out ?

In reply to a post by truex360:

The circuit has been tested and the results are as follows :

Problem Explanation: [EPP508] No performance issues have been identified in the BTW network.
Resolution/Recommendation: Please follow your diagnostic procedures to resolve the fault.

GEA Test - 30M-60M Downstream, Interleaving Off - 10M-20M Upstream, Interleaving Off

The GEA test passed indicating no issues however the circuit appears to be banded. As no fault has been found on the circuit, it is advised to power cycle all the equipment connected to the line including the VDSL modem for a period of 15-20 minutes and retest.

That looks very much like Plusnet's terminology.

If you are indeed you are with Plusnet, I can confirm they do NOT see all the modem's resyncs in their own logs.

Does your modem resync "on the fly" regularly?
The built in modem log should confirm that (may need to be enabled first though).

Attenuation etc. suggests a higher speed should be possible, but SNRM doesn't, thus indicating quite a noisy line. Possibly cross-talk issues?

How long have you had FTTC & how long was it before sync & attainable rates dropped?

If you are with Plusnet, the 80/20 service is still a "trial" & as you are achieving over 50% of available speeds I doubt they could/would pursue this unless you are able to prove "faults" - maybe via setting up the ongoing stats logging/graphing.

I have seen many issues on my connection with GEA tests all O.K. sort of comments & it has taken around 11 months to finally get it sorted - & that is even with extremely well documented "proof".

If you haven't already done so, disconnecting & reconnecting via the router (not modem) sometimes frees up a "stuck" low IP Profile.

Your ISP would also definitely see that in their logs as it initiates a new PPP session.

Good luck

Edited by Bald_Eagle1 (Wed 13-Jun-12 07:26:30)