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Contributor
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Message 1 of 21

BT Infinity 1 Speed - not getting what I used to

Hi,

 

I've had BT Infinity here since it was available to me (early 2011), and when first installed I got somewhere around 48 Mbps download, however over time it's dropped to around 30Mbps which has been frustrating, but still fast enough to do what I needed with it.

 

I've installed a new router today to replace the HH5, so have gone back to my old BT Openreach modem (together with an Asus RT-AC3200) which has given me the impetus to try and do something about the speed drop.

 

www.btwholesale.com/includes/adsl/main.html tells me I should expect what I previously was getting - 35Mbps+

 

Featured Products

Downstream Line Rate(Mbps)

Upstream Line Rate(Mbps)

Downstream Range(Mbps)

WBC FTTC Availability Date

WBC SOGEA Availability Date

Left in Jumper

  HighLowHighLow        

VDSL Range A (Clean)4935107--Available----
VDSL Range B (Impacted)37.2208.34.7--Available----

 

However speedtest.btwholesale.com/ shows a 29.5Mbps download against an IPprofile set at 30Mbps

 

Download speedachieved during the test was - 29.15 Mbps
For your connection, the acceptable range of speedsis 21.01 Mbps-30.01 Mbps .
Additional Information:
IP Profile for your line is - 30.01 Mbps

 

Upload speed achieved during the test was - 6.57Mbps
Additional Information:
Upstream Rate IP profile on your line is - 10 Mbps

 

I understand that 29Mbps with an IP Profile of 30Mbps is "acceptable", however it's this 30Mbps cap which is not.

 

Is there something I can do to find my 'missing' 18Mbps .. or someone I can contact who might be able to do something about it?

 

Thanks

 

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Distinguished Sage
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Message 2 of 21

Re: BT Infinity 1 Speed - not getting what I used to

Is your router connected to the master socket, or an extension?
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Contributor
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Message 3 of 21

Re: BT Infinity 1 Speed - not getting what I used to

The master socket - it used to be an extension but a BT engineer moved it/converted it/whatever they do.

 

Line stats from the modem are here:

 

Image1.png

 

 

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Distinguished Sage
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Message 4 of 21

Re: BT Infinity 1 Speed - not getting what I used to

Can you post the results for your number from this checker please http://www.dslchecker.bt.com

You're currently in a banded profile, most likely due to an unstable line.

Do you have any extensions?
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Contributor
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Message 5 of 21

Re: BT Infinity 1 Speed - not getting what I used to

It says this:

        

VDSL Range A (Clean)4935107--Available----
VDSL Range B (Impacted)37.2208.34.7--Available----

 

We do have extensions, yes - but only one is in use. 

They were here when the speed was higher too.

 

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Message 6 of 21

Re: BT Infinity 1 Speed - not getting what I used to

The stats of the web interface are not useful
You need to post the output of xdslcmd from the telnet session to see what is the real situation
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Contributor
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Message 7 of 21

Re: BT Infinity 1 Speed - not getting what I used to

It says this:

 

# xdslcmd info --pbParams
xdslcmd: ADSL driver and PHY status
Status: Showtime
Retrain Reason: 0
Last initialization procedure status:   0
Max:    Upstream rate = 8427 Kbps, Downstream rate = 39324 Kbps
Bearer: 0, Upstream rate = 8427 Kbps, Downstream rate = 32399 Kbps
Bearer: 1, Upstream rate = 0 Kbps, Downstream rate = 0 Kbps
Discovery Phase (Initial) Band Plan
US: (7,32) (871,1205) (1972,2782)
DS: (33,859) (1216,1961) (2793,3970)
Medley Phase (Final) Band Plan
US: (7,32) (871,1205) (1972,2394)
DS: (33,859) (1216,1961) (2793,3718)
                  VDSL Port Details               Upstream                Downstream
Attainable Net Data Rate:            8427 kbps              39324 kbps
Actual Aggregate Tx Power:             5.8 dBm               12.2 dBm
====================================================================================
        VDSL Band Status                U0              U1              U2     U3               U4              D1              D2              D3
  Line Attenuation(dB):  7.3     36.6    54.8     N/A     N/A    18.1    45.1   69.4
Signal Attenuation(dB):  7.3     35.9    52.7     N/A     N/A    25.9    44.8   70.5
                SNR Margin(dB):  6.4     6.4     6.4      N/A     N/A    8.6    8.7      8.8
                 TX Power(dBm):  0.3    -6.4     4.0      N/A     N/A    10.0   7.9     -3.6
#
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Distinguished Sage
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Message 8 of 21

Re: BT Infinity 1 Speed - not getting what I used to

Can you test into the test socket with a filter and repost those stats?

The sync rate won't change but I'm interested in the "max downstream rate" value.
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Contributor
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Message 9 of 21

Re: BT Infinity 1 Speed - not getting what I used to

This is connected to the test socket - it doesn't look much different:

 

# xdslcmd info --pbParams
xdslcmd: ADSL driver and PHY status
Status: Showtime
Retrain Reason: 0
Last initialization procedure status:   0
Max:    Upstream rate = 8454 Kbps, Downstream rate = 39560 Kbps
Bearer: 0, Upstream rate = 8454 Kbps, Downstream rate = 32399 Kbps
Bearer: 1, Upstream rate = 0 Kbps, Downstream rate = 0 Kbps
Discovery Phase (Initial) Band Plan
US: (7,32) (871,1205) (1972,2782)
DS: (33,859) (1216,1961) (2793,3970)
Medley Phase (Final) Band Plan
US: (7,32) (871,1205) (1972,2376)
DS: (33,859) (1216,1961) (2793,3516)
                  VDSL Port Details               Upstream                Downstream
Attainable Net Data Rate:            8454 kbps              39560 kbps
Actual Aggregate Tx Power:             5.6 dBm               12.3 dBm
====================================================================================
        VDSL Band Status                U0              U1              U2     U3               U4              D1              D2              D3
  Line Attenuation(dB):  7.3     36.5    54.7     N/A     N/A    18.1    44.9   69.1
Signal Attenuation(dB):  7.3     35.9    52.4     N/A     N/A    25.9    44.6   70.0
                SNR Margin(dB):  6.8     6.3     6.2      N/A     N/A    8.5    8.6      8.5
                 TX Power(dBm):  0.4    -6.5     3.8      N/A     N/A    9.9    7.9     -1.2
#
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Distinguished Sage
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Message 10 of 21

Re: BT Infinity 1 Speed - not getting what I used to

You need to book an engineer visit.
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