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Fibre 2 - Downstream Handback Threshold (Mbps) and Legacy VDSL

MisterDog — Fri, 30 Apr 2021 17:01:36 GMT

Can someone tell me what Downstream Handback Threshold (Mbps) means, as shown in screenshot below.

And has anyone heard Legacy VDSL used when referring to a Fibre 2 service (or in fact any other BB service) and if so, what it means?

Re: Fibre 2 - Downstream Handback Threshold (Mbps) and Legacy VDSL

licquorice — Fri, 30 Apr 2021 17:15:20 GMT

The downstream handback threshold is the speed below which you can be released from your contract without penalty if BT are unable to improve on it. Effectively it is the speed below which you can raise a complaint of low speed.

Re: Fibre 2 - Downstream Handback Threshold (Mbps) and Legacy VDSL

MisterDog — Fri, 30 Apr 2021 18:05:13 GMT

@licquorice Great - thanks for that info. So just to clarify, even though there's a 45Mbps Stay Fast Guarantee I could leave without penalty if it's (I guess consistently) below 57.7Mbps? It's currently 54Mb, but 65-70+ prior to latest line fault. Not concerned yet as helpfully informed by @imjolly it would take 7-10 days to get back to speed following a DLM reset/port swop.

Can you perhaps also tell me what a 'legacy VDSL' is? Might have misheard, but pretty sure the engineer said something about this being a possible explanation when I asked why the line was still slow compared to before the fault.

Re: Fibre 2 - Downstream Handback Threshold (Mbps) and Legacy VDSL

licquorice — Fri, 30 Apr 2021 18:18:53 GMT

No idea what 'legacy VDSL' is, sounds like BS from the engineer to me.

Bear in mind whatever ISP you use, you will have the same infrastructure and same speed.

Re: Fibre 2 - Downstream Handback Threshold (Mbps) and Legacy VDSL

pippincp — Fri, 30 Apr 2021 19:30:56 GMT

There is no such thing as legacy VDSL. Something such as delivery only becomes "legacy" when the delivery system has changed. There has been no change to VDSL delivery system.

Re: Fibre 2 - Downstream Handback Threshold (Mbps) and Legacy VDSL

MisterDog — Fri, 30 Apr 2021 21:59:05 GMT

BS. Right.

And thanks, I'm already aware other ISP's would deliver a service over "the same infrastructure" but given the quality of BT's service and support I might just as well look to get the equivalent at less expense.

Re: Fibre 2 - Downstream Handback Threshold (Mbps) and Legacy VDSL

iniltous — Sat, 01 May 2021 08:02:34 GMT

If BT Consumer have given you a stay fast guarantee of 45Mb, then ( AFAIK ) the ‘wholesale’ minimum hand back threshold of 49-58Mb that ‘OR’ will deliver to the ISP, is irrelevant to you , and , if you have had a fault that’s now repaired, there is no reason why your speed wouldn’t return to around that observed on the 20/4, of around 71Mb, way in excess of both anyway.

TBH, if you feel you could get a similar service for less money , the connection speed would remain similar with any provider , the only difference being the router supplied by the ISP and the backhaul , any real world difference would be with throughput speed not connection speed , and that would be more a measure of the backhaul etc the ISP has available , a budget provider may be more inclined to save money here , as it’s something consumers are unlikely to consider ( or even be aware of ).

If you are within a minimum term, any provider would hold you to that term , or raise ETC, if they were delivering what they ‘promised’, and you chose to leave anyway.

Re: Fibre 2 - Downstream Handback Threshold (Mbps) and Legacy VDSL

MisterDog — Wed, 12 May 2021 15:13:25 GMT

Hi @iniltous thanks for your reply. Prior to the repair we were getting 69-70 Mbps on Wifi all round the house. Now it's 50-60. Guessing this is because the data rate shown on the hub is now 69.67Mbps when it was ~79Mbps before the fault and repair. Is it possible for BT to increase the hub data rate somehow?

Re: Fibre 2 - Downstream Handback Threshold (Mbps) and Legacy VDSL

licquorice — Wed, 12 May 2021 15:20:18 GMT

Your data rate is at the maximum possible that your line will support. You have a 3.0dB noise margin, its not going to improve on that.

Re: Fibre 2 - Downstream Handback Threshold (Mbps) and Legacy VDSL

MisterDog — Wed, 12 May 2021 16:32:50 GMT

Can you tell why the repaired line, albeit on a new port at the exchange, would perform less well than previously?

Re: Fibre 2 - Downstream Handback Threshold (Mbps) and Legacy VDSL

licquorice — Wed, 12 May 2021 16:46:13 GMT

If your pair was changed between the cabinet and DP because of a faulty pair, the new pair will have different characteristics and perhaps more susceptible to crosstalk interference. No two lines behave exactly the same.

You haven't said when the repair was, but you were only getting 70.94M on 20th April according to your screenshot in your original post.

Re: Fibre 2 - Downstream Handback Threshold (Mbps) and Legacy VDSL

MisterDog — Wed, 12 May 2021 16:46:34 GMT

@licquorice

Re: Fibre 2 - Downstream Handback Threshold (Mbps) and Legacy VDSL

MisterDog — Wed, 12 May 2021 16:48:27 GMT

@licquorice The repair was 29April.

Re: Fibre 2 - Downstream Handback Threshold (Mbps) and Legacy VDSL

licquorice — Wed, 12 May 2021 16:52:36 GMT

So you were getting 70 before the repair and 70 after.

What date is the log screenshot?

Re: Fibre 2 - Downstream Handback Threshold (Mbps) and Legacy VDSL

MisterDog — Wed, 12 May 2021 17:22:22 GMT

@licquorice here's a 'before' from November

and one from today -(hub restart as 2.4GHz printer keeps stopping working)

Re: Fibre 2 - Downstream Handback Threshold (Mbps) and Legacy VDSL

MisterDog — Wed, 12 May 2021 18:06:10 GMT

I'll ask a different question.