Thanks everyone. I didn't start out with too much detail as I wanted to see what the initial reactions were.

ISP Origin
Router ASUS N-12

I've been using all the speed testers, but here is the BT one

Download speedachieved during the test was - 50.32 Mbps
For your connection, the acceptable range of speedsis 40 Mbps-53.1 Mbps .
Additional Information:
IP Profile for your line is - 53.1 Mbps
2. Upstream Test: -provides background information.
Upload Speed
17.05 Mbps
0 Mbps 20 Mbps
Max Achievable Speed
Upload speed achieved during the test was - 17.05Mbps
Additional Information:
Upstream Rate IP profile on your line is - 20 Mbps

I am pretty sure that we have a less than perfect line for it to be losing that much data on the profile etc.

I'm looking for comparable data so as to be able to encourage my ISP to do something about it vis a vis the line.

Many thanks.

As I've asked previously, do you know that's your line length or is that your guesstimate based on how far away from the cabinet you live?

What speed range for your line is given on the BT Wholesale availability checker?


Also, a loss of 3meg on a 53meg profile when carrying out a speedtest wouldn't really indicated to me that there's an issue with your line causing a loss of throughput.

Sorry, the line length was given to me by my ISP, along with all this other data in December:

Description GEA service test completed and no fault found but unable to check for customer equipment connected to modem.
Main Fault Location OK
Sync Status In Sync
Downstream Speed 58.7 Mbps
Upstream Speed 20.0 Mbps
Appointment Required N
Fault Report Advised N
NTE Power Status PowerOn
Voice Line Test Result Pass
Bridge Tap Not Detected
Radio Frequency Ingress Not Detected
Repetitive Electrical Impulse Noise Not Detected
Cross Talk Not Detected
Estimated Line Length In Metres 334.3
Upstream Rate Assessment Very Good
Downstream Rate Assessment Low
Interference Pattern Not Detected
Service Impact No Impact Observed
Home Wiring Problem Not Detected
Downstream Policing Discard Rate 0.0
Customer Traffic Level Upstream and Downstream Traffic Detected
Profile Name 0.128M-80M Downstream, Error Protection Off - 0.128M-20M Upstream, Error Protection Off


Parameters MIN MAX AVG
Down Stream Line Rate 58.6 Mbps 59.4 Mbps 59.2 Mbps
Up Stream Line Rate 19.9 Mbps 19.9 Mbps 19.9 Mbps
Up Time 102.0 Sec 900.0 Sec 896.5 Sec
Retrains 0.0 1.0 0.0

It's an estimate so it could be wrong of course

Can you put your number into here - https://www.btwholesale.com/includes/adsl/adsl.htm?s... and post the results.

It looks like your sync speed has dropped since those figures were given you. It's just below 55Mbps now.

That's a reverse calculation. IP Profile on FTTC is sync x 0.9679 without G.INP and 0.9669 with G.INP.

Were you an early adopter on your cabinet or has it been there for a while? You can lose sync speed as more users get FTTC on the cabinet, and it can be sudden caused by one particular connection, not gradually in proportion to the number.

I guess your ISP is Plusnet.

That "estimate" is very likely to be accurate to within a few metres as it will have been measured electronically using a TDR.

The OP needs to give actual line stats from the modem or router.

The cabinet was new in late October. As our BDUK local rep, I was one of the first to get in, so the slowing may well be down to that.

Regarding your line length, hopefully the length is as measured by a TDR (Time Domain Reflectometer or as I called my one, Pocket Radar Set).

I am only 50 Meters from the PCP with no obstructions etc, green-field site; BUT 250 Metres by original phone line.

The FTTC location although only 40 Metres from the PCP and 10 Metres from my house, adds an extra 50 Metres for the VDSL run, increasing the line length to 300 Metres.

In reply to a post by eckiedoo:

Regarding your line length, hopefully the length is as measured by a TDR (Time Domain Reflectometer or as I called my one, Pocket Radar Set).

I am only 50 Meters from the PCP with no obstructions etc, green-field site; BUT 250 Metres by original phone line.

The FTTC location although only 40 Metres from the PCP and 10 Metres from my house, adds an extra 50 Metres for the VDSL run, increasing the line length to 300 Metres.

So, could I use a ex BT 301C TDR to accurately measure my line length, or would BT start beating me with a big stick?

Edited by Nightglow (Tue 26-Jan-16 15:40:09)

In reply to a post by Nightglow:

So, could use a ex BT 301C TDR to accurately measure my line length, or would BT start beating me with a big stick at me?

Yes you could. And if you read it correctly and look for little "blips" you may even be able to say where there are joints in the cable.