Sudden drop in sync speed

We have had rock solid sync speeds in the range of 9-10Mbps for several years but last night the connection dropped and it is now syncing at only 6Mbps. I have tried two different routers and the attenuation is 38.5db with a noise margin of 6.4db. By my reckoning this is spot on and I should still be getting 9-10Mbps and not the 30% lower 6Mbps.

Nothing changed at all, was watching iplayer (in hd without issue) and the connection dropped. It came back up at 512Kbps so I then changed the router in case to rule that out. After many reboots the router(s) are now syncing consistently at 6Mbps. I will try replacing the filter tonight.

I have enabled the broadband quality monitor to see if that sheds any light on the issue:
http://www.thinkbroadband.com/ping/share/6182871d4ac...



Any other suggestions?

Edited by jgoodman00 (Tue 19-Jun-12 15:07:52)

TBB monitor looks pretty poor.

Can you post the full router stats page ?

What happens with a (preferably corded) phone using the test socket inside the master, if you do the quiet line test? 17070 option 2. Nothing else connected.

What mode is it connecting with? Looks almost like a drop from ADSL2+ mode to ADSL only mode

In reply to a post by MrSaffron:

What mode is it connecting with? Looks almost like a drop from ADSL2+ mode to ADSL only mode

That was my thought as well. Customer service reset my connection from the exchange after it dropped completely and it is now at 7700Kbps which is still a little low but at least its usable again!

After plenty of calls to O2 and feeling like it was groundhog day everytime they eventually despatched a bt engineer. He found a fault in the faceplate which appeared to fix it until a couple of weeks ago.

Since then the connection has dropped almost nightly and the sync speed drops from approx 8Mb to 1.5Mb and the attentuation increases from 37db to 47db (SNR remains at 6). This happens almost every night. I have spoken to O2 again and they put the line under monitoring but that doesnt seem to yield any results.

Well with an attenuation of 37 dB, your throughput should be between the 9-10 Meg you usually get.

You say it happens almost every night. The almost implying it's intermittent and night implying it could be peak time congestion. I think it's a possible traffic jam at your exchange.

Pop your details in here. What does VP capacity show as for your exchange?

If it's amber or red then ask O2 if they'll get you moved onto an un-congested DSLAM, a BTO engineer should do this free of charge.

Good thinking but may not be relevant if he is on O2 LLU.

I don't know if that checker applies to LLU, but I doubt if O2 have multiple DSLAMS at many exchanges.

In reply to a post by jgoodman00:

Looks like your BQM is out of action?

New router with pings disabled, or a change of IP address?

In reply to a post by RobertoS:

Good thinking but may not be relevant if he is on O2 LLU.

I don't know if that checker applies to LLU, but I doubt if O2 have multiple DSLAMS at many exchanges.

I suppose and upon further investigation it looks like that checker is BTW only and LLU ISPs do have their own DSLAMs.

Even though, it might be worth the OP requesting to be moved to a different one.