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jinky123
Contributor
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Message 1 of 18

BT Infinity Graphs Show Speed Loss

Can anyone shed some light on my tracking of my download and upload speeds from my OpenReach HG612 modem. I have been logging the modem negotiation speeds since the beginning of November and they have been dropping in steps. See the various graphs below from my logs.

 

The today graph 12th December 2017 shows the diurnal loss of speed at night , not bothered about that small variation.

VDSL2 Day Down and Up Mbps

 

The step change is more worrying from approx 16Mbps to just about 10Mbps. I notice the Upload

has increased while the Download decreased.

VDSL2 Week Down and Up Mbps

 

This really shows the two step changes of speed drop over the weeks, very worrying. I notice the Upload

has increased while the Download decreased.

VDSL2 Month Down and Up Mbps

 

The year shows the drop as well.

VDSL2 Year Down and Up Mbps

 

Nothing in my setup has changed over the time I have been logging the modem negotiated speeds.

I had problems back in April 2014 when my ADSL2 speeds dropped due to a tree branch in a neighbours

garden wearing through my telephone line. This was repaired by OpenReach but the tree branch was still there

so it may have done the same again but I'm not sure. I have had 16Mbps for a few years now without issue so

what do you suggest I do to get my speed back to its very slow for infinity 16Mbps. Should I raise a ticket with BT?

Cheers

-Jim

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XRaySpeX
Recognised Expert
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Message 2 of 18

Re: BT Infinity Graphs Show Speed Loss

Please post your full Router Stats. For a Home Hub see on here: Broadband Top Tips . Full router stats are key to any speed & connection issues.

 

What does BT Broadband Availability Checker estimate for your phone number? Post just the whole table and the line above it, blanking out your phone number. If it doesn't recognise your phone number, use the Address Checker, not the Postcode Checker.

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Sage
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Message 3 of 18

Re: BT Infinity Graphs Show Speed Loss

@XRaySpeX As the OP uses a HG612 we'll settle for the modem stats.

XRaySpeX
Recognised Expert
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Message 4 of 18

Re: BT Infinity Graphs Show Speed Loss

Sorry, missed it .

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jinky123
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Message 5 of 18

Re: BT Infinity Graphs Show Speed Loss

Screenshot of stats from HG612

 

Stats.png

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jinky123
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Message 6 of 18

Re: BT Infinity Graphs Show Speed Loss

Retraining reason is 2 from screenshot. Codes from Thinkbroadband

 

Loss Of Framing (not receiving valid frame) : re-train reason code of 2.
Loss Of Signal (not receiving signal) : re-train reason code of 4.
Loss Of Power : re-train reason code of 8.
Loss Of Signal Quality : re-train reason code of 16.
Loss Of Margin : re-train reason code of 32.

 

-Jim

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XRaySpeX
Recognised Expert
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Message 7 of 18

Re: BT Infinity Graphs Show Speed Loss

Would you please just copy those stats straight to a post. I can't read that, sorry.

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jinky123
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Message 8 of 18

Re: BT Infinity Graphs Show Speed Loss

The reason I sent the screenshot was because of the loss of text formating when copy pasting. Ok here goes :-

 

 

# xdslcmd info --pbParams
xdslcmd: ADSL driver and PHY status
Status: Showtime
Retrain Reason: 2
Last initialization procedure status: 0
Max: Upstream rate = 2079 Kbps, Downstream rate = 10568 Kbps
Bearer: 0, Upstream rate = 1295 Kbps, Downstream rate = 10152 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) (2793,3959)
Medley Phase (Final) Band Plan
US: (7,32) (871,1078)
DS: (33,859)
VDSL Port Details Upstream Downstream
Attainable Net Data Rate: 2079 kbps 10568 kbps
Actual Aggregate Tx Power: 5.8 dBm 7.5 dBm
====================================================================================
VDSL Band Status U0 U1 U2 U3 U4 D1 D2 D3
Line Attenuation(dB): 13.8 71.4 N/A N/A N/A 26.9 84.6 N/A
Signal Attenuation(dB): 13.8 70.4 N/A N/A N/A 33.3 N/A N/A
SNR Margin(dB): 9.9 10.1 N/A N/A N/A 6.5 N/A N/A
TX Power(dBm): 0.2 4.3 N/A N/A N/A 7.5 N/A N/A
#

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jinky123
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Message 9 of 18

Re: BT Infinity Graphs Show Speed Loss

One other thing when BT originally came and installed Infinity their estimated speed was between 20 and 30 Mbps. But it was only ever 17Mbps.....

-Jim

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XRaySpeX
Recognised Expert
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Message 10 of 18

Re: BT Infinity Graphs Show Speed Loss

Thanks. That's fine! We're used to the formatting.

 

You must be below BT's Min. Guaranteed Speed.

 

What does BT Broadband Availability Checker estimate for your phone number? Post just the whole table and the line above it, blanking out your phone number. If it doesn't recognise your phone number, use the Address Checker, not the Postcode Checker.

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