Why has my line speed been reduced?

qqg3

qqg3

qqg3

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I live in N.Yorks and about 4-3 months ago my line speed could achieve max 1.5 megs (100kbs download speed).

Now, it can only achieve 0.5 meg and the download speed is dead.

This is what the test on the BT Broadband, O2 Broadband and Internet Speedtest website told me.

I'm furious. Our line speed was pretty shocking before, but now its terrible!

Is there somebody I can shout at about this or complain to? You can barely call this a broadband connection!
 
I'm with Orange, (never bothered changing through Freeserve, Wanadoo and now Orange because we live in a such a slow spot).

I pulled this info off of the router (Livebox), don't have a clue what it all means ;).

ADSL firmware version : A2pBT009c1.d17d
Connection mode : G.DMT
Type : Interleave
Noise margin (dB) : 9.4
Attenuation (dB) : 56.0
Attainable download rate (kbps) : 768

Downstream Upstream Rate (kbps)
672 448
Click to expand...
 
Attenuation shows that your line is long-ish. But you should be able to get about 2Mb. 672k is far below what you should be expecting, and shows that the problem is with the physical connection to the exchange.

Next step is to check your phone wiring. Is the router connected directly to the BT master socket, to another phone socket, or to an extension?
 
Unplug all phone devices from sockets, including the filters, then plug the router in to the BT master socket and see what kind of speeds you get.

If this improves, then add the devices back on to the network one by one to see at which point the line drops.

If it doesn't improve when everything is disconnected then it's time to phone the ISP for a line test me thinks.
 
As a side note, also test using the "Test socket" located behind the faceplate of the master socket.
 
Tried the aboves and still no luck. I'm pretty convinced its the exchange and not me because every test says the max I can get is 512, when only a few months ago they were saying 1.5 meg.

Rung ISP and they wanted me to run the bt speedtester. Which I'm doing, maybe they can kick someone into gear sorting this out.
 
If you are on an ADSL Max connection and you'll get an averaged line speed.

This means that if you are turning your modem off regularly for long periods (ie overnight) that your average line speed goes down.
 
Taziir said:
If you are on an ADSL Max connection and you'll get an averaged line speed.

This means that if you are turning your modem off regularly for long periods (ie overnight) that your average line speed goes down.
Click to expand...

Ask ISP to reset line profile or re-train your line, then leave your router connected without manually re-booting it all the time. only downside to this is you dont know what will happen, it will either re-train the line gaining better speeds, or it could go the other way and you will end up with worse than you are now.
 
DJMK4 said:
Ask ISP to reset line profile or re-train your line, then leave your router connected without manually re-booting it all the time. only downside to this is you dont know what will happen, it will either re-train the line gaining better speeds, or it could go the other way and you will end up with worse than you are now.
Click to expand...

+1

Best thing to do iis leave the modem connected directly in to the test socket while the profile retrains.

On Max connections the profile updates itself once every 3 days automatically but BT BB support can reset the profile from their end (wish I could remember what the tool was called now.
 
The profile doesn't affect sync rate, though, and neither does the guesstimator "test". Whether it says you can get 512kbps or 8Mbps is neither here nor there.

If you restart the Livebox and let it connect, what do the stats look like. The BT Speedtester isn't going to do a lot of good if you're connected at 768kbps - you'll get the 512kbps IP profile and get the 60kB/s you're getting.
 
That's right.
A fluctuating sync rate pulls down the profile, which seems to function as a cap on transfer speed by ensuring stability - it's been a long time, probably got something backward!

After a reset of the profile it should match the actual sync, at least for the first few days while the DSL Max works out the top stable speed the line supports.

Even simply unplugging the cable between modem and socket counts as a disconnection as DSL Max expects the modem to be always on and connected.
 
Taziir said:
A fluctuating sync rate pulls down the profile, which seems to function as a cap on transfer speed by ensuring stability - it's been a long time, probably got something backward!
Click to expand...

The IP profile doesn't affect stability at all. It does affect throughput but it's a result of the sync rate rather than the cause of it.

After a reset of the profile it should match the actual sync, at least for the first few days while the DSL Max works out the top stable speed the line supports.
Click to expand...

With that sync rate it won't change and it's got nothing to do with the "top stable speed".
What I think you're driving at is getting the target SNR margin reset rather than the "profile" - 9dB isn't normal and if, for some reason, it's been increased (typically because the DLM thinks the line's unstable) you'd get a reduction in sync rate to improve stability. Resetting that would give you some more speed - probably enough to get you at least past the threshold for the 1Mbps IP profile.

It's also possible the SNR margin's got there just through normal variation though, which is why I suggested reconnecting and seeing what the stats looked like then.

Even simply unplugging the cable between modem and socket counts as a disconnection as DSL Max expects the modem to be always on and connected.
Click to expand...

It doesn't count individual disconnections. The connection would need to be unstable, i.e. disconnecting dozens of times an hour, to trigger a change in the target SNR margin (which is what you're really getting at).
 
So I've tried faffing around with the livebox over the past few days, speed all over the place. Sometimes hitting 504kbps, holding steady for a while at 704kbps and for a few hours hitting 900kbps!

For the last few days its stuggled around the 500kbps mark.

Orange sent me a new router, a Gigaset one. I've set it it all up and... ouch.

DSL Line

Status: Cable connected
Line mode: G.992.1 (G.DMT)
Maximum line rate: 288 kbps (downstream) / 448 kbps (upstream)
Noise margin: 9 dB (downstream) / 18 dB (upstream)
Line attenuation: 49 dB (downstream) / 31 dB (upstream)
Output power: 13 dBm (downstream) / 12 dBm (upstream)
Click to expand...

Struggling at about 30kbps downloading a small file now, connection has gone from bad to worse with the new router.
Unsure whether to try the livebox again, I'm just not sure about those stats. At points it doesnt feel like its running at that kind of speed.
 
If you're certain the issue isn't your internal wiring, then you have a line fault. Can you hear any noise or anything untoward during voice calls? It's easier to get BT to fix the line if you have problems with voice than if it's just the DSL.
 
Generally telephone calls around here are shabby quality, but then I think thats how they have always been to be honest. Hmm, might give the 'indians' at Orange another buzz and see what they say. I love customer service!.... :(

EDIT:

Orange said something along the lines that the IP profile for my line is messed up so they are gonna badger BT to sort it out and I should hear back.
 
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