New Smart Hub 2 = Drop in speed

[#1]

Hi @Stoneblade

Cheers for the update. I'm really sorry to see you're still having speed issues. 

I've tested your line today and the tests aren't showing the cause for this.

As it's the physical line speed / sync rate that's at 49mbps, we'll need to arrange another Openreach engineer to take a closer look, so I've booked the visit and updated the ticket 221871267 with the appointment details.

Let us know how it goes.

[#2]

@Gandalf 

Thank you for the reply, unfortunately I am not in on that day, would it be possible to change the day to Tuesday first thing?

With thanks

[#3]

@Gandalf 

Just rang up the help desk to amend just in case you couldn't catch it in time.  Thanks again

[#4]

Good call! Cheers for calling us. 

Let me know how the engineer visit goes.

[#5]

@Gandalf 

DLM seems to have settled my line over night at 55mb, but I am still only downloading at 50mb (via ethernet), will this increase over time or is this normal difference between actual sync speed and download speed?  Engineer is still booked for today, I did try cancelling as the line did increase in speed but I think it was too short notice.

[#6]

Cheers for the update @Stoneblade

I'd say that the 5mbps difference between your download speed & sync speed is normal, as there are overheads of a connection. It looks like an engineer visit not long ago, and couldn't find any issues.

I'd recommend keeping an eye on it, because looking at our diagnostic data, yesterday it flagged up "Line issue detected", so we may need to arrange a further engineer to investigate again.

Let me know how it goes. 

[#7]

@Gandalf 

Thanks for confirming the sync speed vs download speed. 

The engineer did a line check when he was here and said it was pretty much perfect so is a bit odd. I will keep an eye on it and come back here if it drops again.  Im hoping it is fixed now and stays a higher speed, wish me luck.

Thank you for helping out

[#8]

No problem, sounds like a plan and good luck!

[#9]

@Gandalf @adam945 @Baldrick1 

Just an update,

I've had a few drops in the last week and had an engineer out yesterday.  He seems to have been able to up my line speed nearly 10mb by changing a pair in the cabinet?  The  attainable speed is now about 63.5mb but my actual speed is still stuck at the lower speed (54mb) I was at before the engineer.  Am I restricted to this lower speed for a reason, I read something about banding?

Really happy he was able to get it up that much, but don't seem to be able to now get the actual speed to match the attainable

Thanks in advance.

[#10]

Thanks a lot for getting back to us and I'm glad to hear that your line has improved. Checking the line this morning is also showing a sync speed of 55Mbps, which is towards the higher end of your estimated speeds. Line's don't always reach their maximum attainable speeds due to various factors such as the weather, quality of the drop wire etc. 

I'd say that in this case, there's little further that can be done to improve the download speeds. 

[#11]

@adam945 

Thanks for the reply.  When I had the issue before this my attainable was exact as the speed I am at now, so was hoping on a little bit of an uplift.  I will give it a few days and see if the DLM ups the sync speed a bit more, fingers crossed it does.  Was just checking if my profile was now set right with the new attainable.

[#12]

@Stoneblade  The attainable rate in the modem stats is not a real achievable speed it is a calculated value that the modem generates using an algorithm in the firmware that is often hopelessly inaccurate, sometimes it may be close to your actual speed more by luck than anything else. or as you have found, much higher than the actual sync speed, this is commonly the case when interleaving is enabled. There are many line conditions that affect the sync speed which the attainable calculation cannot cope with,  such as in my case for a known reason I am running at a very low SNRM value of 1.8db at full 79.999Mbps sync speed, my attainable is 74.508Mbps so it is rather low. My advice is to ignore the so called attainable and concentrate on the actual sync speed.😊

Edit: Your line profile is in no way related to the attainable speed figure.

[#13]

@Stoneblade

I can see the DLM profile is "Downstream: 0.128M-80M with Interleaving (Low). Upstream: 0.128M-20M with no error protection" so there's nothing restricting your modem from negotiating a higher sync speed to the cabinet. 

It also looks like your speed has crept up to around 62mbps today.

[#14]

@Gandalf 

Thanks for the update, I swapped out the modem for a BT Home 5 Type A this morning which seem to bring the sync up to speed.  I did have to reset the hub a couple of times which dropped my sync by a couple of Mb, hopefully now the line is stable it will regain those lost Mb?

Thanks for the others advice too.  I am a bit of a beginner with all this and appreciate the feedback.

[#15]

No worries and I'm glad to see your speed has picked up with your new modem.

It may increase further but I can't guarantee that as it'll be down solely to DLM.