Print

Please login or register.
1 Hour 1 Day 1 Week 1 Month Forever
Login with username, password and session length

[JRHartley]

Hi,
My new FTTC service is getting poor speeds compared to what BT predict on their checker site for my phone number.
They estimate:
A (clean) 80 80 20 20
B (impacted) 80 69.2 20 19

I'm actually getting sync speed of 48.3/15.9 (and actual speed of 45/13).
Attenuation of 21.3

Is BT's website accurate based on actual line length or just a rough guess? BT are offering an overpriced engineer visit to investigate if there's actually a fault.

Thanks

[Dray]

Their estimate should be accurate. How long have you been installed?

[JRHartley]

Hi,
Thanks for replying. It's been enabled for 6 days.
I've checked other houses on my estate and they get different results on that test site so I assumed it had some level of accuracy but I've heard it's just a good estimate.

[kitz]

Its usually conservative with its estimates.
But seeing your attenuation of 21.3 dB then you are looking in the region of 45-50 Mbps, also depending if g.inp is enabled yet.
iirc Ronski used to get about 47Mbps on his line which has similar attenuation.

Could that telephone number have been re-issued and the data carried from a previous premises?
What does the checker say if you use the postcode?

[JRHartley]

Looks like I'm getting about typical speeds for that attenuation then. Just checked the address checker and that comes back with
A 80 78 20 20
B 80 56.7 20 17.3

The phone line has always been mine from new 12 years ago so there's shouldn't be an issue there.

Ultimately I guess I have high attenuation causing low speeds. I'm just stuck on whether it's line length or a fault. BT can't find anything at the cabinet end supposedly so I'm not sure what there is fault wise they could find at my end?

[S.Stephenson]

Looks like I'm getting about typical speeds for that attenuation then. Just checked the address checker and that comes back with
A 80 78 20 20
B 80 56.7 20 17.3

The phone line has always been mine from new 12 years ago so there's shouldn't be an issue there.

Ultimately I guess I have high attenuation causing low speeds. I'm just stuck on whether it's line length or a fault. BT can't find anything at the cabinet end supposedly so I'm not sure what there is fault wise they could find at my end?

A few good things to check are how far the cabinet is from your house and make an estimate of how long the line could be.

Also I assume you are plugged into the master socket and not an extension line.

[JRHartley]

Thanks for the reply.

All plugged into the master socket with a brand new faceplate and shielded rj11. My house is on the corner of a square shaped estate, with my neighbour (one house closer to the cabinet) having an attenuation of 13.6 (compared to my 21.3). He's a minimum of 480m from the cabinet. I guess it's possible they've cabled me the long way round the estate.

But I'm just still surprised the BT checker is so far off as I thought the phone number search would be accurate, but maybe not.

[S.Stephenson]

Thanks for the reply.

All plugged into the master socket with a brand new faceplate and shielded rj11. My house is on the corner of a square shaped estate, with my neighbour (one house closer to the cabinet) having an attenuation of 13.6 (compared to my 21.3). He's a minimum of 480m from the cabinet. I guess it's possible they've cabled me the long way round the estate.

But I'm just still surprised the BT checker is so far off as I thought the phone number search would be accurate, but maybe not.

Is your neighbor on a different telegraph pole?

Only three things jump to mind of you are on different poles.

Neighbor has a thicker gauge wire somehow as 13.6 seems low for 480m.

Your pair could be made of aluminium.

Or your wire goes the long way around the estate as you mentioned.

[JRHartley]

All the cabling is underground as it's a relatively new housing estate so there's no poles. I'll try and get some stats from other neighbours and compare attenuation.