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FlamingBadger
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Message 1 of 11

Infinity 2 much slower sync speeds two years on

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Hi,

 

I was one of the early adopters of BT Infinity when it first became available in my area around two years ago.  At the time, Infinity 2 had just been launched and I was connected and able to pull 70+Mbps from any UK based speed test site including BT's own.   Over the last two years, I've seen my speed drop to around 50Mbps, which although is still fast - isn't what I was receiving when I first signed up and I'm trying figure out why and whether I should report this as a fault or not? 

 

Initial conversations with BT support over the online chat went along the lines of "50Mbps is fine for your line - go away".

 

I have always used the BT supplied Infinity modem coupled with a Cisco ASA 5505 firewall.  I have never used the HomeHub I was supplied with.  A new line was installed for Infinity and only has the BT modem and a dect phone connected so there is no internal wiring to worry about making me think this is either oversubscription in the cabinet, or crosstalk or something along those lines.

 

Any advice welcome.

 

Thanks!

 

 

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Message 2 of 11

Re: Infinity 2 much slower sync speeds two years on

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Is your modem unlocked so you can post your line stats?
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FlamingBadger
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Message 3 of 11

Re: Infinity 2 much slower sync speeds two years on

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Thanks for the reply Ray. The modem is stock as BT supplied it so I'm guessing it's locked. I do remember when the engineer first installed Infinity and plugged his tester in, it returned a line capability of around 112Mbps but I've no idea what it is now.
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Distinguished Guru
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Message 4 of 11

Re: Infinity 2 much slower sync speeds two years on

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That's one advantage of the Homehub5 - it displays the sync speed and noise margin, so you can see what the IP Profile is.

If you run the BT Performance Test at www.speedtest.btwholesale.com then proceed to the further diagnostics, after you enter your phone number, your IP Profile will be displayed.

Can you post your IP Profile please?

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FlamingBadger
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Message 5 of 11

Re: Infinity 2 much slower sync speeds two years on

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Thanks again for the reply Ray.

 

Information requested attached.  I've never seen the upload speed as slow as 5Mbps before but I guess that might just be time of day.

 

Download Speed (Mbps 51.35)
Upload Speed (4.84)
Ping Latency (ms) 18.88

Download speedachieved during the test was - 51.35 Mbps
For your connection, the acceptable range of speedsis 40 Mbps-55.54 Mbps .
Additional Information:
IP Profile for your line is - 55.54 Mbps

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Distinguished Guru
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Message 6 of 11

Re: Infinity 2 much slower sync speeds two years on

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Yes, that's the problem with the Performance Test, it doesn't report the actual upstream IP profile, just 10 or 20 depending on if you're on Infinity 1 or 2.

It's far more useful to see the sync speeds and the noise margins so you can tell if your problem is more likely to be a fault, congestion or crosstalk.

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FlamingBadger
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Message 7 of 11

Re: Infinity 2 much slower sync speeds two years on

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I have the original HH3 rotting in a box somewhere if you think that will supply any useful information but from what I've read, it seems I need a HH5?

 

Any additional thoughts?

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Message 8 of 11

Re: Infinity 2 much slower sync speeds two years on

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Sorry, the details I want to see are locked inside the modem 😞
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FlamingBadger
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Message 9 of 11

Re: Infinity 2 much slower sync speeds two years on

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Hi

 

So I managed to get my hands on a HH5, disconnected existing setup and connected PC and vDSL into it directly.  The line statistics are as follows:

 

1. Product Name: HomeHub52.

Serial number: +076284+14020068743.

Firmware version: v0.07.01.0235-BT (Type B)

Last updated [Unknown]4.

Board version: 015.

VDSL uptime: 0 days, 00:07:136.

Data Rate: 19595 / 555007.

Maximum Data Rate: 19561 / 555848.

Noise Margin: 5.9 / 6.39.

Line Attenuation: 0.0 / 13.010.

Signal Attenuation: 0.0 / 0.011.

Data sent/received: 0.3 MB / 0.4 MB12.

 

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dfenceman
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Message 10 of 11

Re: Infinity 2 much slower sync speeds two years on

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Hi FlamingBadger

 

You may find the following article by Mark Heath, winner of the Prime Minister's Point of Light award, of interest :- 

http://www.increasebroadbandspeed.co.uk/2014/vectoring-crosstalk-crisis

 

Best regards,
dfenceman