Another VDSL speed thread and some confusion! (sorry)

Forums › 2degrees (including Slingshot, Orcon, Flip, Stuff Fibre, MyRepublic, 2talk and Vocus) › Another VDSL speed thread and some confusion! (sorry)

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#144289 14-May-2014 08:57

VDSL with Slingshot.

After a few false starts and reliability issues I had a second engineer visit my home, berate the first engineer for not doing his job and install new CAT6 from the road/POP to the house.

It has been nearly a month since his visit and my previously unstable connection is now reliable and working well...however;

Never satisfied, I am wondering if I shouldn't be getting better sync speeds given my stats:

I am getting a Maxrate of 38mb, a Sync rate of 35mb and download speed tests are in line with this - up stream around 10Mb.

My Downstream attenuation is 2-3dB (2 with one modem and 3 with the ISP one) with SNR of 12-13.

I spoke with CallPlus a few times - first time was the usual "port reset, DLM etc" conversation.

The conversation I had yesterday was even more confusing - I was told that the maximum capability of the cab was 24mb for VDSL and 8Mb for ADSL2 - neither of which stacks up against the performance I am getting now, nor the ADSL2 performance I had previously.

If I didn't know better, I would suspect them of reading off the wrong line and giving me the ADSL and ADSL2 stats...

:-/

Anyways - long story short, does this stack up?

I am not dissatisfied with the performance now and if that is the limit then I am fine with that - I do however want to ensure that I am getting performance in line with the full capability of the infrastructure and that am not getting short-changed/fobbed off.

Cheers gang

(stat shots and spectrum to follow if relevant - will need to get home first...)

PeterReader

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#1043389 14-May-2014 08:57

Hello... Our robot found some keywords in your post, so here is an automated reply with some important things to note regarding broadband speeds.

If you are posting regarding DSL speeds please check that

- you have reset your modem and router

- your PC (or other PCs in your LAN) is not downloading large files when you are testing

- you are not being throttled by your ISP due to going over the monthly cap

- your tests are always done on an ethernet connection to the router - do not use wireless for testing

- you read this topic and follow the instructions there.

Make sure you provide information for other users to help you. If you have not already done it, please EDIT your post and add this now:

- Your ISP and plan

- Type of connection (ADSL, ADSL2, VDSL)

- Your modem DSL stats (do not worry about posting Speedtest, we need sync rate, attenuation and noise margin)

- Your general location (or street)

- If you are rural or urban

- If you know your connection is to an exchange, cabinet or conklin

- If your connection is to a ULL or wholesale service

- If you have done an isolation test as per the link above

Most of the problems with speed are likely to be related to internal wiring issues. Read this discussion to find out more about this. Your ISP is not intentionally slowing you down today (unless you are on a managed plan). Also if this is the school holidays it's likely you will notice slower than usual speed due to more users online.

A master splitter is required for VDSL2 and in most cases will improve speeds on DSL connections. Regular disconnections can be a monitored alarm or a set top box trying to connect. If there's an alarm connected to your line even if you don't have an alarm contract it may still try to connect so it's worth checking.

I recommend you read these two blog posts:

- Is your premises phone wiring impacting your broadband performance? (very technical)

- Are you receiving a substandard ULL ADSL2+ connection from your ISP?

I am the Geekzone Robot and I am here to help. I am from the Internet. I do not interact. Do not expect other replies from me.

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Athlonite

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#1043481 14-May-2014 10:15

With this sort of attenuation (My Downstream attenuation is 2-3dB) I would expect somewhere in the vicinity of high 60's megabits not 35

Batman

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#1043492 14-May-2014 10:25

Hang on did you say you need a new cat 6 from the road? I only have cat 6 from the master filter

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#1043499 14-May-2014 10:31

Athlonite: With this sort of attenuation (My Downstream attenuation is 2-3dB) I would expect somewhere in the vicinity of high 60's megabits not 35

Well that's what I thought - hence my confusion!

I realise there are certainly other factors at play here and the attenuation isn't the be all/end all, but all the signs as I know them point to some underperformance somewhere.

Sadly this is not my field of expertise and I don't have enough technical ammo to challenge them on it yet.

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#1043500 14-May-2014 10:32

joker97: Hang on did you say you need a new cat 6 from the road? I only have cat 6 from the master filter

Don't quote me on that - I wasn't home when they did the work and I haven't explored the cable run, so it may well be as you say.

I doubt they did anything special here - only what they were supposed to do in the first place.

sidefx

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#1043501 14-May-2014 10:34

joker97: Hang on did you say you need a new cat 6 from the road? I only have cat 6 from the master filter

No, you don't need it. It can help in some situations I think but is certainly not mandatory or essential.

@OP: Your rates don't seem too bad. Any idea what your error rates are like? With that attenuation I'd think you have a good chance of getting onto 17a, but that can take a while to happen! Only on the 17a profile will you see downstream sync of 50+.

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#1043507 14-May-2014 10:38

sidefx:
joker97: Hang on did you say you need a new cat 6 from the road? I only have cat 6 from the master filter

@OP: Your rates don't seem too bad. Any idea what your error rates are like? With that attenuation I'd think you have a good chance of getting onto 17a, but that can take a while to happen! Only on the 17a profile will you see downstream sync of 50+.

Seeing CRC downstream errors of "65" last time I checked.

I am not sure over what time period that is however, though some cursory testing seems to suggest that might be over the lifetime of the current connection period, which at a good few hours since I last messed with it probably isn't too bad.

If it is per minute, however things might be a little more broken!

Will check the errors again tonight along with spectrum. The latter doesn't mean anything to me, but I know there are plenty of you who can interpret it!

sidefx

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#1043518 14-May-2014 10:45

Yup, put up a screenshot of error rates when you can and someone can probably let you know if they look high.

You sync does seem a little lower than usual with that attenuation. TBH If your error rates are OK though, I'd probably just suggest leaving the connection alone and hoping you get onto 17a. I think there have been a few folk in the VDSL performance tuning thread who didn't have great sync speeds on the initial 8b profile, but then moved to the 17a profile and got well over 60+ down sync. You need to be patient though as DLM will move you to 17a automatically, but in some cases it seems it can take weeks.

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#1043570 14-May-2014 11:35

it sounds like you may be in a nosey area, or your line card has pulled back the power level (an assumption from what i have seen with multiple lines) a tad due to your line issues(in my experience, DLM resets do nothing to fix this.)

quit buggering around with your line. plug it in, and LEAVE it. if your line is 2dB, its almost certain it will jump to 17a. this may take a few months, but it will get there.

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#1043628 14-May-2014 12:05

quit buggering around with your line. plug it in, and LEAVE it. .

Like a scab or mouth ulcer I just can't stop picking at...

I Have left alone this time though - no tweaking, no buggering, just left in peace.

DravidDavid

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#1043629 14-May-2014 12:05

As per Sidefx's comment...Your speed will most likely increase over time. A friend of mine recently had it installed and it took a month for his speeds to jump from 32 average to a 70+ average.

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#1043708 14-May-2014 12:40

Cheers all - I guess the consensus is to shut up and leave it alone for another month and see what happens!

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#1043734 14-May-2014 12:51

Item: Cheers all - I guess the consensus is to shut up and leave it alone for another month and see what happens!

did you ever have a 17a profile?

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#1043782 14-May-2014 13:12

hio77:
Item: Cheers all - I guess the consensus is to shut up and leave it alone for another month and see what happens!

did you ever have a 17a profile?

I don't believe so no. Certainly nothing in my historic sync speeds suggests I have.

If you recall, I managed to force the sync speed higher through snr tweaking, but that exacerbated the instability...

This time I have left everything vanilla in the DSL settings.

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#1043786 14-May-2014 13:14

Item:
hio77:
Item: Cheers all - I guess the consensus is to shut up and leave it alone for another month and see what happens!

did you ever have a 17a profile?

I don't believe so no. Certainly nothing in my historic sync speeds suggests I have.

If you recall, I managed to force the sync speed higher through snr tweaking, but that exacerbated the instability...

This time I have left everything vanilla in the DSL settings.

snr tweaking will always make your line more instable.

run your line at 12dB (normal.) leave it be.

reason i asked if you had 17a is the 90day wait period..

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