Is A 60/20 Estimate Possible With A 500m Distance?

I estimate the distance to my cabinet is approximately 500m. The BT line checker gives me an estimate of 60/20MB. Does that seem realistic/possible? TIA

I'm about 450m from my cabinet; I get ~67Mbps on fastpath, ~61Mbps when interleaving goes on.

So it doesn't sound unreasonable.

Certainly does seem possible

My suspicion is that those speeds are for the first user in a cab... there were only around a dozen users on mine when I switched to 80/20, and even then I couldn't quite match those numbers

There ought to be enough of us on here, who have enough "experience" of both "first line connected" and "increasing crosstalk", to put together a more comprehensive table/graph.

I would help, but I don't have a lot of time on here over the next couple of months...

I'm not sure how useful it would be- you'd also really need to know how far each user was from the cabinet (to get an average/spread), and the most important datum (number of connected users) isn't easy to find on a regular basis. OpenReach will presumably know, but I'm sure we've all tried getting information out of them

You'd also need to know whether each user was on 40Mbps or 80Mbps... eg I'm quite sure that if I dropped back to a 40/10 product my reaction would be "Crosstalk? What crosstalk?"

So you'd end up with two 4-dimensional tables, one for 40Mbps users, another for 80Mbps, each having:

Speed loss due to crosstalk
Distance from cabinet
No of connected users
Proportion of 80/40 users

Not easy

There's other variables to, relating to the cabling type, condition and position of your pair in the overall bundle. In practice, it's "suck it and see".

I'm 450 meters from the cabinet, and my estimate was/is 57/20, but you can see what I'm getting below

Download is a bit higher now, and upload is lower.

General consensus is that most users seem to get higher than the estimate, but it may drop as cross talk increases.

I'm 600m. See my sig.

I personally think you wont get 20 upload, or at least it wont be sustained long term (before vectoring).

I'm ~600m from my cabinet.
When first installed 18months ago the sync rate (I was told by Openreach) was 60mbps but that was on 40/10.
When I was upgraded (about 12months ago) to the 80/20 package I got about 55mbps.
About 6 months ago I was disconnected for a few hours and it turns out someone on my street was getting FTTC installed. When "fixed" (I reported it, and was reconnected but Openreach still came out the next day anyway) I ended up with 30mbps and that's where it has stayed ever since, though it did fall to 25mbps on some evenings around Xmas (suspect dodgy set of lights in someone's garden).
The BT Wholesale checker says "Up to 58.2".
As a completely unscientific test I've wandered around looking for BT FON and HomeHub3 access points and there are loads, suggesting high take-up. Also Virgin cable don't cover my area and ADSL2+ tops out at ~5mbps.

Hope this info helps but too many factors to give realistic predictions.

I didn't know about those... I'd guess the only reliable way to find those out, especially for older installations, is to dig the damn thing up

In reply to a post by Chrysalis:

I personally think you wont get 20 upload, or at least it wont be sustained long term (before vectoring).

I don't see why not, I do.

Of course, that's profile (~sync speed), not upload speed. Upload speed is 15-16Mbps.

everyone on 80/20 product has a 20 upstream profile regardless of sync.

I dont see many (if any at all) with circa 60meg sync also having a 20 upload sync.

My 71.9 sync has a 22mbit upstream attainable (I think the HG's reported attainable were too high, ECI seems more accurate based on the other stats). My estimated distance based on the attenuation is 400-450m I reckon. Possibly 500m at a push. Over double the direct distance.

With that said he may well get something like a 70-80 down sync then I think he will get 20 upload.

Edited by Chrysalis (Fri 25-Jan-13 16:06:27)

550m from cabinet - 42\12. Estimate was 35\6 Very little take up in area - so will probably drop in the next 12 months as more subscribe.

In reply to a post by Chrysalis:

everyone on 80/20 product has a 20 upstream profile regardless of sync.

I dont see many (if any at all) with circa 60meg sync also having a 20 upload sync.

Mine syncs at 65/20, which is close, and has a max attainable upload just under 24 Mbps (from an unlocked ECI modem)

yeah and after seeing someone in the 50s have a 18 upload I will retract my original comment.

Had my install on Friday, I am 550m but almost certainly the first on the cab, maybe second.

Didn't plan on there being a new model ECI modem so despite soldering a header on and having 2 USB>TTL convertors I can't get stats...

However his tester showed 62/20 and tcp/ip tests are giving me 65 down and the full 20 up. 12ms latency so fastpath. Maybe the ECI is better than his tester...my estimate was/is 45/8.

He told me I am all copper, underground and less than 15 years old so maybe I'm a best case.

Fully expect it to drop off some but hopefully I keep the 20 up!

Edited by deleted (Sat 26-Jan-13 18:17:15)

In reply to a post by R0NSKI:

I'm 450 meters from the cabinet, and my estimate was/is 57/20, but you can see what I'm getting below

Download is a bit higher now, and upload is lower.

General consensus is that most users seem to get higher than the estimate, but it may drop as cross talk increases.

I am almost exactly the same distance and my estimate for down was 68. Unfortunately it seems that somewhere externally on my connection there is a dud bit of cable, probably aluminium. My ISP had the engineers out and he spent a long time here, but could not connect with his machine at more that 53. HE stated that this was within the acceptable limits and so openreach would just sign off and close the job.

My actual speed is more usually about 48 down but this depend on the time of day etc.

While I think this is very fast compared to to pre FTTC speeds which were probably about 2mb down, it would be nice to get what was theoretically possible. The engineer said that aluminium cables were fine under older slower broadband but are now really beginning to become an issue, unfortunately though the expense of getting rid of them will not be justified.

In reply to a post by philippercival:

I am almost exactly the same distance and my estimate for down was 68. Unfortunately it seems that somewhere externally on my connection there is a dud bit of cable, probably aluminium. My ISP had the engineers out and he spent a long time here, but could not connect with his machine at more that 53. HE stated that this was within the acceptable limits and so openreach would just sign off and close the job.

You're lucky. I'm 500m and only get 45down and 8up - and was quoted 40 / 5 !