This topic

Stay fast guarantee

Cappi — Fri, 28 Feb 2025 08:47:10 GMT

I am in the process of changing to fibre 2. Within the contract I have been quoted a stay fast guarantee of 34Mbps whereas on the BT web site it states 62Mb (see below). Does anyone know why there is a discrepancy?

I am also struggling to find a way of communicating with BT in writing.

Re: Stay fast guarantee

iniltous — Fri, 28 Feb 2025 09:24:18 GMT

The minimum speed guarantee to a certain extent is irrelevant, the actual speed you get is almost entirely dependent on the distance you are from the cabinet, so assuming no defects on the line , the customer equipment and internal wiring etc , if the line were capable of (for example) 70Mb , that what your line syncs at , irrespective if the MSG being 60Mb or 30Mb , it’s not like the speed is restricted to the MSG , it’s simply a threshold at which a problem can be investigated.

The only issue would be is if your line was delivering 70 and then developed a problem dropping the speed to 50 , with a MSG of 30 , you may struggle to get a speed issue looked at by the provider as it’s still above the MSG , but if the MSG were 60, then 50 is obviously lower and triggers a response.

As far as the difference, if you had a line in service, it is generating real performance data , so the mathematical model /calculation of the line performance is superseded with real data , if the user of that line were ( for arguments sake ) using their router on the end of a cheap extension cord and that was negatively impacting the performance , or the line had an unreported problem that reduced the speed but it was unnoticeable ( so was never reported or fixed ) the MSG would be lowered reflecting the real data that indicates a slower sync rate , if that person stop using the defective extension, or the underlying fault repaired, the line speed improves and the MSG increases in line with the increased real world data.

Re: Stay fast guarantee

Cappi — Fri, 28 Feb 2025 12:23:51 GMT

Thank you, however I am troubled by the contract stating 34Mb whereas the advertised is 62Mb.

Re: Stay fast guarantee

imjolly — Fri, 28 Feb 2025 12:27:36 GMT

@Cappi

if you are changing (upgrading?) to fibre 2 what speed do you currently have? the 62mb in the advertisement is an example for a customer getting a connection speed of 70mb+. the lower your connection speed the lower stayfast guarantee

Re: Stay fast guarantee

Cappi — Fri, 28 Feb 2025 12:42:37 GMT

142Mb

Re: Stay fast guarantee

iniltous — Fri, 28 Feb 2025 12:57:23 GMT

142Mb , must be Gfast or FTTP , if you are FTTP then you get the headline speed , there is no distance related reduction , if you once could get Gfast , but it’s no longer a portfolio product , considering Gfast was only available to those with very short lines from the PCP , your FTTC speed should be pretty decent as you should be pretty close to the cabinet.

TBH , I don’t really see the issue , if you want FTTC , the speed you get is related to the distance you are from the cabinet, not the MSG , the NSG is only relevant with defective lines , the minimum speed guarantee makes no difference to that , your line is either OK or it isn’t .

If won’t commit to taking FTTC because the MSG is significantly lower than the speed you almost certainly will get , rather than being around 10% lower than the sync speed , don’t purchase FTTC , it’s unclear what you are actually expecting .