VDSL upgrade - ISP told me connection is not advisable.

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df2334

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#205296 7-Nov-2016 19:34

Hi,

I wonder if anyone had similar experience. I've asked Slingshot to upgrade my connection from ADSL to VDSL. My property was shown as eligible for VDSL on both chrous website and slingshot's website. However, I was told that I may not get a good connection as one of the testing they've done is slightly above threshold. I don't know what it is the thing they've measured on, but it's something like 12 is threshold and mine is 13. They told me that I may have an unstable connection or even degraded speed after the upgrade, but they also said it could work without problem or even having a much faster speed. I am not sure if they are being geninue here or just trying to avoid antyhing that may be complicated.

If I go ahead with the upgrade and doesn't work out, I will have to pay the disconnection fee to fall back to ADSL which is the something I want to avoid, so I did some check myself around the cabinets near my property. There are two cabinets near by and one of them is around 800-900 meters and the other is around 400-500 meters. This is a direct measurement so the actual distance has to be longer than that.

Has anyone got this problem and still went ahead with upgrade ? Did it work out ?

THanks

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#1665311 7-Nov-2016 19:44

Well you could always ring another ISP and say you are looking at changing but before you do can they confirm you can get it.

However most of the time ISP's don't want to give customers the run around and will not just say "no you can't have it" for no reason.

Also just because a cabinet is less than 1k away does not mean the copper is. When I was in browns bay I could see the exchange building (like 150 metres away) but we had about 1.5 - 2km's of cable to it

Linux

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#1665313 7-Nov-2016 19:47

As above the copper could run down one side of the street and then back around it does not always go directly to the exchange / cabinet

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DarkShadow

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#1665318 7-Nov-2016 19:58

df2334:

I don't know what it is the thing they've measured on, but it's something like 12 is threshold and mine is 13.

The attenuation limit for VDSL is technically 15dB. However, as mentioned by your ISP, if it's higher than about 10, it's not advisable as it could be unstable. Individual circumstances vary so you could always give it a try and see what happens.

Knowing the distance to the cabinet is not useful as that does not indicate the length of the cable.

Your ISP's policy of charging a disconnection fee to change back to ADSL is not very customer friendly though. Other ISPs will let you change plans any time with no fee and no contract required.

hio77

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#1665321 7-Nov-2016 20:10

Post your full linestats and we can give it a skim.

as @DarkShadow has stated, it is now 15dB.

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df2334

24 posts

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#1665323 7-Nov-2016 20:16

DarkShadow:

df2334:

I don't know what it is the thing they've measured on, but it's something like 12 is threshold and mine is 13.

The attenuation limit for VDSL is technically 15dB. However, as mentioned by your ISP, if it's higher than about 10, it's not advisable as it could be unstable. Individual circumstances vary so you could always give it a try and see what happens.

Knowing the distance to the cabinet is not useful as that does not indicate the length of the cable.

Your ISP's policy of charging a disconnection fee to change back to ADSL is not very customer friendly though. Other ISPs will let you change plans any time with no fee and no contract required.

Thanks for the info, you are right it is 15db, I've called the call centre again and was told mine is between 14 and 17 db. Regarding the disconnection fee, it turns out the last rep I've spoken to was actually giving me bullsxits. It is clearly stated on their website that if it is below 15MB then it is free of charge for rolling it back.

It's amazing that each time you call them you get completely different set of information.

df2334

24 posts

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#1665324 7-Nov-2016 20:17

hio77:

Post your full linestats and we can give it a skim.

as @DarkShadow has stated, it is now 15dB.

How do I get my full linestats plz?

Cheers

Jase2985

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#1665325 7-Nov-2016 20:19

look in the modem at the DSL stats page

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#1665328 7-Nov-2016 20:31

Please get a professional to check out the Telephone house wiring and maybe get a master Filter installed

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df2334

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#1665362 7-Nov-2016 21:33

Jase2985:

look in the modem at the DSL stats page

DSL Modulation ITU G.992.5(ADSL2PLUS) ANNEX Mode ANNEX M SNR Down 10.7 dB SNR Up 5.9 dB Line Attenuation Down 30.1 dB Line Attenuation Up 15.9 dB Path Mode Interleaved Data Rate Down 5302 kbps Data Rate Up 2014 kbps MAX Rate Down 6332 kbps MAX Rate Up 2028 kbps POWER Down 0.0 dbm POWER Up 12.5 dbm CRC Down 0 CRC Up 0

coffeebaron

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#1665383 7-Nov-2016 22:05

That is a very poor performing line indeed. I think you need a master filter for starters, but a line in that state is asking for trouble if you switch to VDSL.

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Sideface

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#1665390 7-Nov-2016 22:19

As above.

Line Attenuation Down = 30.1 dB

A master filter may well improve your ADSL performance, but forget VDSL.

Your ISP gave you good advice.

Sideface

df2334

24 posts

Geek

#1665406 7-Nov-2016 22:40

Sideface:

As above.

Line Attenuation Down = 30.1 dB

A master filter may well improve your ADSL performance, but forget VDSL.

Your ISP gave you good advice.

I've swapped the modem with a different one. Now I am getting significantly improvement over attenuation. Especially that SNR. Now I am getting 8.5Mb down whereas previously it was only around 5Mb. I think there may be a couple of issues here but I will definitely get a better modem. Previously it was Asus RT-N66, it either wasn't setup correctly or it was faulty.

Uptime:

0 days, 0:32:24

DSL Type:

ITU-T G.992.5

Bandwidth (Up/Down) [kbps/kbps]:

1,112 / 9,908

Data Transferred (Sent/Received) [MB/MB]:

30.85 / 333.46

Output Power (Up/Down) [dBm]:

12.6 / 0.0

Line Attenuation (Up/Down) [dB]:

13.7 / 27.0

SN Margin (Up/Down) [dB]:

5.4 / 5.0

System Vendor ID (Local/Remote):

TMMB / ----

Chipset Vendor ID (Local/Remote):

BDCM / IFTN

Loss of Framing (Local/Remote):

0 / 0

Loss of Signal (Local/Remote):

0 / 0

Loss of Power (Local/Remote):

0 / 0

Loss of Link (Remote):

Error Seconds (Local/Remote):

13 / 1

FEC Errors (Up/Down):

0 / 858

CRC Errors (Up/Down):

6 / 37

RunningMan

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#1665430 8-Nov-2016 03:55

Your downstream attenuation is still 27dB. This is far higher than the recommended cutoff of 15dB. Chances are that VDSL will perform poorly.
Very poor house wiring could contribute to such a high attenuation in which case a master filter would be beneficial for xDSL. Getting one will improve adsl but I wouldn't bother with vdsl unless that attenuation drops significantly

Jase2985

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#1665432 8-Nov-2016 05:03

Does annex M and the 6dB SNR suggest wholesale gear?

RunningMan

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#1665532 8-Nov-2016 09:15

Jase2985:

Does annex M and the 6dB SNR suggest wholesale gear?

No. Chorus would be 12dB. This is ULL.

EDIT: Brain fade.

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