Speed halving each night at the same time.

Forums › Spark New Zealand (including Skinny and BigPipe) › Speed halving each night at the same time.

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Bung

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#1114206 23-Aug-2014 20:50

What does the horrid cabinet have to do with a regular time of day drop in synch speed? Horrid as it may be it apparently works until evenings.

richms

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#1114212 23-Aug-2014 21:33

As noise gets worse your noise margin will drop. Once the connection no longer stands up reliably it will re sync the connection to reestablish it with a 12 db margin again.

Noise is picked up by unterminated stubs and low quality filters messing up the balance of the line. Fix that and you should get less noise so the 12 db margin is enough to last thru the evening without doing a re sync.

Richard rich.ms

Coil

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#1114213 23-Aug-2014 21:34

richms: As noise gets worse your noise margin will drop. Once the connection no longer stands up reliably it will re sync the connection to reestablish it with a 12 db margin again.

Noise is picked up by unterminated stubs and low quality filters messing up the balance of the line. Fix that and you should get less noise so the 12 db margin is enough to last thru the evening without doing a re sync.

I survive with VDSL @ 6-9dB SNR. Stable connection.

oceanlyner

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#1116873 27-Aug-2014 21:34

So as you all guessed, it is not fixed....

Any idea what the large amount of downstream FECs mean?

DSL synchronization status Up
DSL up time 1 Days 03:40:22
Line Status Help
Line standard ADSL2+
Channel type Interleaved
Downstream line rate (kbit/s) 3920
Upstream line rate (kbit/s) 1080
Downstream SNR (dB) 11.1
Upstream SNR (dB) 12.4
Downstream line attenuation (dB) 26.5
Upstream line attenuation (dB) 11.5
Downstream output power (dBmV) 0
Upstream output power (dBmV) 12.6
Downstream CRC 11044 Upstream
CRC 618
Downstream FEC 65644092
Upstream FEC 0

BarTender

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#1117263 28-Aug-2014 14:22

oceanlyner: So as you all guessed, it is not fixed....

Any idea what the large amount of downstream FECs mean?

DSL synchronization status Up
DSL up time 1 Days 03:40:22
Line Status Help
Line standard ADSL2+
Channel type Interleaved
Downstream line rate (kbit/s) 3920
Upstream line rate (kbit/s) 1080
Downstream SNR (dB) 11.1
Upstream SNR (dB) 12.4
Downstream line attenuation (dB) 26.5
Upstream line attenuation (dB) 11.5
Downstream output power (dBmV) 0
Upstream output power (dBmV) 12.6
Downstream CRC 11044 Upstream
CRC 618
Downstream FEC 65644092
Upstream FEC 0

FEC is Forward Error Correction

Would normally mean you have a dodgy line, I assume you have asked for a 24 hour line test to be run and got the results?

RunningMan

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#1117300 28-Aug-2014 15:21

BarTender:

FEC is Forward Error Correction

Would normally mean you have a dodgy line, I assume you have asked for a 24 hour line test to be run and got the results?

This. Everything you have posted so far is pointing to a physical line fault - this means an intermittent or faulty connection, corrosion or something similar. Statistically this is more commonly inside the premises than outside on Chorus' lines, so ruling out the internal wiring first is the usual practise.

I'd suggest as a first step, contact Fraser (coffeebaron) and get him to sort the internal wiring, probably with a master splitter instal - chances are this will fully resolve the issue. If not, then you will no doubt see an improvement in speed anyway (so money well spent), and the problem can be referred back to your ISP to follow up with Chorus.

Also, changing ISPs is not going to address this issue (other than a more or less helpful helpdesk!).]

EDIT: Spelling

oceanlyner

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#1117411 28-Aug-2014 17:38

Had Chorus out twice today... They were supposed to ring before they turned up, but I got a call as the guy was leaving.

Managed to get him to come back while I was there and bribe him to install a master splitter. Speed is now up to 10mbps and the line is looking much healthier.

Stats for comparison:

DSL synchronization status Up
DSL up time 03:48:34
Line Status Help
Line standard ADSL2+
Channel type Interleaved
Downstream line rate (kbit/s) 11980
Upstream line rate (kbit/s) 1080
Downstream SNR (dB) 10.9
Upstream SNR (dB) 12.8
Downstream line attenuation (dB) 24.5
Upstream line attenuation (dB) 11.1
Downstream output power (dBmV) 0
Upstream output power (dBmV) 12.6
Downstream CRC 0
Upstream CRC 3
Downstream FEC 2420
Upstream FEC 0

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hio77

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#1117419 28-Aug-2014 17:49

oceanlyner: Had Chorus out twice today... They were supposed to ring before they turned up, but I got a call as the guy was leaving.

Managed to get him to come back while I was there and bribe him to install a master splitter. Speed is now up to 10mbps and the line is looking much healthier.

Stats for comparison:

DSL synchronization status Up
DSL up time 03:48:34
Line Status Help
Line standard ADSL2+
Channel type Interleaved
Downstream line rate (kbit/s) 11980
Upstream line rate (kbit/s) 1080
Downstream SNR (dB) 10.9
Upstream SNR (dB) 12.8
Downstream line attenuation (dB) 24.5
Upstream line attenuation (dB) 11.1
Downstream output power (dBmV) 0
Upstream output power (dBmV) 12.6
Downstream CRC 0
Upstream CRC 3
Downstream FEC 2420
Upstream FEC 0

and we have results!

looking much better!

#include <std_disclaimer>

Any comments made are personal opinion and do not reflect directly on the position my current or past employers may have.

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