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Standard User Rackers
(newbie) Tue 21-Jul-15 19:18:19
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What are these line stats telling me?


[link to this post]
 
xdslcmd: ADSL driver and PHY status
Status: Showtime
Retrain Reason: 1
Last initialization procedure status: 0
Max: Upstream rate = 6567 Kbps, Downstream rate = 23196 Kbps
Bearer: 0, Upstream rate = 8076 Kbps, Downstream rate = 23637 Kbps

Discovery Phase (Initial) Band Plan
US: (6,31) (882,1193) (1984,2770)
DS: (33,857) (1218,1959) (2795,4083)
Medley Phase (Final) Band Plan
US: (6,31) (882,1193) (1984,2423)
DS: (41,857) (1218,1959)
VDSL Port Details Upstream Downstream
Attainable Net Data Rate: 6567 kbps 23196 kbps
Actual Aggregate Tx Power: 5.7 dBm 12.1 dBm
====================================================================================
VDSL Band Status U0 U1 U2 U3 U4 D1 D2 D3
Line Attenuation(dB): 8.5 41.3 59.4 N/A N/A 22.1 50.5 75.0
Signal Attenuation(dB): 8.5 41.2 57.9 N/A N/A 28.6 50.3 N/A
SNR Margin(dB): 4.0 3.9 4.5 N/A N/A 2.9 2.9 N/A
TX Power(dBm): -3.5 -1.6 4.0 N/A N/A 10.4 7.3 N/A

Error counts:

Downstream Upstream
Line rate (kbit/s) 23637 8076
CRC errors 58228 0
FEC errors 274 31
HEC errors 10902 0

I have been connected for just over 2 days. When installed I was getting 40MB/s but it has been decreasing and has now hit 23MB/s. I'm trying to get BT to take a look but want a bit more info about what these stats are telling me. I would appreciate any help you can give me.

Thank you
Standard User BatBoy
(sensei) Tue 21-Jul-15 19:22:03
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Re: What are these line stats telling me?


[re: Rackers] [link to this post]
 
Looks like you have a long line length from the cabinet.

What is the estimate for your line given by www.dslchecker.bt.com ?
Standard User Rackers
(newbie) Tue 21-Jul-15 20:13:31
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Re: What are these line stats telling me?


[re: BatBoy] [link to this post]
 
Thanks for the quick reply.
Checker tells me this:

High Low High Low
FTTC Range A (Clean) 42.9 32.4 8.7 6 -- Available
FTTC Range B (Impacted) 36.8 20.5 8.7 4.3

I have however just done a quiet line test and I am now getting a whining noise and some electrical sounds which I did not have before! Does those stats show potential noise?

Thanks


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Administrator MrSaffron
(staff) Tue 21-Jul-15 20:15:52
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Re: What are these line stats telling me?


[re: Rackers] [link to this post]
 
Is noise present when vddl modem is off and unplugged from the line?

The author of the above post is a thinkbroadband staff member. It may not constitute an official statement on behalf of thinkbroadband.
Standard User Rackers
(newbie) Tue 21-Jul-15 20:24:26
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Re: What are these line stats telling me?


[re: MrSaffron] [link to this post]
 
Yes, it is still present. Initially the line is quiet but as soon as the noise starts it persists.

Thanks

Stats after the resync:

# xdslcmd info --pbParams
xdslcmd: ADSL driver and PHY status
Status: Showtime
Retrain Reason: 0
Last initialization procedure status: 0
Max: Upstream rate = 11461 Kbps, Downstream rate = 42672 Kbps
Bearer: 0, Upstream rate = 9995 Kbps, Downstream rate = 34999 Kbps

Discovery Phase (Initial) Band Plan
US: (6,31) (882,1193) (1984,2770)
DS: (33,857) (1218,1959) (2795,4083)
Medley Phase (Final) Band Plan
US: (6,31) (882,1193) (1984,2580)
DS: (41,857) (1218,1959) (2795,3250)
VDSL Port Details Upstream Downstream
Attainable Net Data Rate: 11461 kbps 42672 kbps
Actual Aggregate Tx Power: 6.0 dBm 12.5 dBm
====================================================================================
VDSL Band Status U0 U1 U2 U3 U4 D1 D2 D3
Line Attenuation(dB): 5.0 37.9 55.9 N/A N/A 19.1 47.1 71.5
Signal Attenuation(dB): 5.0 37.8 55.1 N/A N/A 25.6 46.8 73.2
SNR Margin(dB): 6.6 6.8 6.4 N/A N/A 6.2 6.3 6.2
TX Power(dBm): -5.1 -6.2 5.4 N/A N/A 10.2 7.3 2.6

Edited by Rackers (Tue 21-Jul-15 20:30:31)

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