Fibre speeds

Hi,

After some independent advice/opinion

When I had Fibre installed last week, the cabinet used was not the one I expected (which is approx 500m away), or the 2nd closest (600m) but in fact one that was 1150m!

I was a little concerned when the engineer stated which Cab he was heading off to, but when he came back the speeds achieved at the house compared to that at the cab were quite impresssive:

Cab - 40.5
House - 39.6

All good, more than happy especially after the estimated speed was just 9.9 and I only really continued with the fibre order after seeing that due to the costs v speed when placed in comparison to the ADSL package I was on.


However, since then I have thought that technically I'm supposed to be on 80/20, so if this is the case, why is the engineer only seeing 40 at the cab?

Is this dictated by product or is this merely down to the Cab equipment?

Thanks in advance for any input............

The speed is mostly due to line length. Is your line up poles, or underground, down holes?

Hi

It's underground

But I was more meaning surely the speed at the cabinet for a 80/20 product should be 80/20 (or at least close)

I can accept the quality would degrade once it starts along the copper route to the premises, but shouldn't the actual cab give max speed?

When the modem syncs with the cab, they are at the same speed by definition.

In reply to a post by BatBoy:

When the modem syncs with the cab, they are at the same speed by definition.

Sorry if I'm appearing dense here, but does your statement back up my posityion that something needs upgrading/firmware flashing/etc at the Cab for it to give 80/20 capable speeds?

It could be that the service is initially installed at the 40 speed but the ISP has to then enable you to get the 80 max speed as it may be on a different tariff and it is not unknown for the faster tariff to be late in being implemented - so ask your ISP if your speed is set to the correct rate.

In reply to a post by ncf355:

Sorry if I'm appearing dense here, but does your statement back up my posityion that something needs upgrading/firmware flashing/etc at the Cab for it to give 80/20 capable speeds?

What I think is that the statement about cab speeds is incorrect because the cab and the modem sync at the same speed.

What you should do is look at the IP profile for your upload speed and this will tell you what package you're on.

If the service was provisioned as 80/20 then a modem hooked up at the copper cab should get pretty much full 80 Meg.

Key is what upload speeds are you getting, as the 40 exists in two variations

40/2
and
40/10

The 80 service is only available as one speed 80/20

If really 1.15km then 39 Meg is pretty amazing.

Hi Andrew

Results from my latest BT Wholesale diagnostic test around 6am today -


Download speedachieved during the test was - 40.74 Mbps
For your connection, the acceptable range of speedsis 38.2 Mbps-47.75 Mbps .
Additional Information:
IP Profile for your line is - 47.75 Mbps

Upload speed achieved during the test was - 7.35Mbps
Additional Information:
Upstream Rate IP profile on your line is - 20 Mbps

So you're on the 80/20 package.

In reply to a post by ncf355:

the estimated speed was just 9.9

I thought you needed an estimated speed above 15meg before the order could be completed or am I out of date/just plain wrong?

BT used to limit the "Infinity" product to lines over a certain speed. If less than that you could get another package ".... with fibre"?

It was done to enable the Infinity package to get the maximum advertising headlines "... up to ????".

I was a little concerned when the engineer stated which Cab he was heading off to, but when he came back the speeds achieved at the house compared to that at the cab were quite impresssive:

Cab - 40.5
House - 39.6

sounds like a 40M product as described. With the low predicted speed your ISP may have ordered 40M.

In reply to a post by yarwell:

I was a little concerned when the engineer stated which Cab he was heading off to, but when he came back the speeds achieved at the house compared to that at the cab were quite impresssive:

Cab - 40.5
House - 39.6

sounds like a 40M product as described. With the low predicted speed your ISP may have ordered 40M.

That was my take, but the post above suggests due to the 45 profile in the results, its 80/20?

You are definitely on 80/20, as those IP Profiles could not exist on 40/n. Speed test results in themselves can be affected by other variables, but not the IP Profiles.

The upstream one of 20Mbs by the way is always set to that, unrelated to the actual connection speed.

If you multiply the downstream IP Profile by 1.033 you get your downstream connection speed within a few kbps.

yeah, I saw the >40 speed. Maybe it started life at 40 and was upgraded or maybe there was miscommunication about the reading at the cab. Who knows, at least you're getting a lot more than predicted !

Well,

ISP have come back to my support ticket on the issue stating the cab hardware cannot support 80/20.

Don't know if this is relevant, but BT order options for my line include Infinity 2, not sure they would take this order if they knew the cab hardware was incapable of the "Up to" 76MB

?

With the current ISP it's a bit more grey as the lower product is limited bandwith so the main purpose in going for the more expensive product is getting the "unlimited" DL's (or that would be their position, I suspect)

Whereas with BT, both products (Infinity 1 and 2) are "unlimited" but one's 40MB and the other is 76.

On another related note, did 2 x speed tests this morning (wired and wireless) giving 1.7MB DL and 9.2MB UL (this at 0550am!)

This isnt the first time I've had such a result at that time of morning, obviously something not quite right there

The cab supports 80/20 just you are stuck on a length of line that aatenuates signal so are slower.

If it really was a 40/10 product you would not have seen the ip profile at a speed over 40.

Plus Openreach fttc cabs all do the 40 and 80 products.

Thanks Andrew

It might help if we knew your ISP. Some throttle, some don't, some it depends on the package you are on. Some just have too many customers at peak time to provide the speed they do during off-peak.