Marginal VDSL Installation Experiences?

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michaelmurfy

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#1057701 1-Jun-2014 21:02

I am in an area with VDSL available, 800m from the cabinet but could only get 4/2mbit, then again my ADSL is only connecting at 5mbit so defiantly something up with the internal wiring / the fact the cable is on overhead pylons.

Michael Murphy | https://murfy.nz
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nigelj

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#1057717 1-Jun-2014 21:55

For what it's worth I decided to bite the bullet since pretty much all the ISPs (even Vodafone which insisted that it was wholesale reasons they couldn't provide VDSL service off the new cabinet) now indicated that they'd provide VDSL no questions ask (shocking considering the distance considering the distance, but oh well).

Either way, I should have a fair idea by Tuesday evening and know for certain 10 days after.

Couple of side notes though..., Telecom's new address checker, that didn't exist when this thread was originally created, quotes (and I'm not kidding):

Ultra VDSL, Downstream at up to: 24-25* Mbps (* [Usual get of jail free stuff which I completely understand and get])
ADSL, Downstream at up to: 12-19 Mbps

a 10Mbps boost over what I'm currently getting would be awesome, but my hopes are set towards to the more realistic goal of about 5 Mbps boost (20Mbps) and primarily the Upstream boost.

Secondly, the Telecom ADSL figures are actually quite accurate really, from attainable rates reported from 3 modems that report them (the previously mentioned TP-Link & Telecom modems, and VF's 'HomeHub') range between 15780 (T/Com) & 18992 (HomeHub), and out of 5 working ADSL2+ modems, actual sync rates fit in a range of about 14254 (old Linksys) & 16326 (HomeHub), so there is some hope that there is some truth to Telecom's guesses. Time will tell.

nigelj

856 posts

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#1059241 4-Jun-2014 16:42

The RFS got pushed out a day but got completed today, stats from the Draytek DV130:

> show adsl stats
--------------------------- ATU-R Info (hw: annex A, f/w: annex Unknown) -----------
   Running Mode            : unknown       State                : SHOWTIME
   DS Actual Rate          : 24696000 bps   US Actual Rate       : 8412000 bps
   DS Attainable Rate      :        0 bps   US Attainable Rate   :        0 bps
   DS Path Mode            :        Fast    US Path Mode         :        Fast
   DS Interleave Depth     :        0       US Interleave Depth :        0
   NE Current Attenuation :       21 dB    Cur SNR Margin       :       12 dB
   DS actual PSD           :     8. 3 dB    US actual PSD        :    18. 5   dB
   ADSL Firmware Version   : 05-04-08-00-00-06
-------------------------------- ATU-C Info ---------------------------------
   Far Current Attenuation :        0 dB    Far SNR Margin       :       11 dB
   CO ITU Version[0]       : 00004d43       CO ITU Version[1]    : 0000d3a3
   DSLAM CHIPSET VENDOR    : < unknown >

VDSL2 Information      (VDSL2 Firmware Version:   05-04-08-00-00-06 )
Profile   State   UP Speed   Down Speed   SNR Upstream   SNR Downstream
8B   SHOWTIME   8308 (Kbps)   24844 (Kbps)   12 (0.1dB)   12 (0.1dB)

(grabbed at slightly different moments hence the slight change is DS/US speeds)

nigelj

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#1065404 14-Jun-2014 10:50

The DLM 10-day period should essentially now be over (or actually maybe, looking at my logs, maybe tonight...). Aside from a minor negative last-minute tuning (!!!), I'm impressed.

From my logs:

2014-06-14 04:14:09    Vdsl    Interface changed: [ifAdminStatus] down -> up; [ifOperStatus] down -> up
2014-06-14 04:12:08    Vdsl    Interface changed: [ifAdminStatus] up -> down; [ifOperStatus] up -> down; [ifSpeed] 27734016 -> 26947584
2014-06-11 00:04:08    Vdsl    Interface changed: [ifSpeed] 26742784 -> 27734016
2014-06-07 04:12:07    Vdsl    Interface changed: [ifSpeed] 24981504 -> 26742784
2014-06-04 17:48:02    Vdsl    Interface changed: [ifAdminStatus] down -> up; [ifOperStatus] down -> up; [ifSpeed] 0 -> 24981504
2014-06-04 15:32:08    Vdsl    Interface changed: [ifAdminStatus] down -> up; [ifOperStatus] down -> up; [ifSpeed] 0 -> 24670208
2014-06-04 14:46:10    Vdsl    Interface changed: [ifDescr] ADSL -> VDSL; [ifAdminStatus] up -> down; [ifOperStatus] up -> down; [ifSpeed] 15416000 -> 25288704; [ifType] adsl -> vdsl

The nice thing about the speed jump on the 11th was it wasn't actually a DLM retrain, it was a resync after a ~10-minute power outage, so I actually took that as a bonus.

Final stats for now seem to be:

Profile   State   UP Speed   Down Speed   SNR Upstream   SNR Downstream
8B   SHOWTIME   8748 (Kbps)   26316 (Kbps)   12 (0.1dB)   12 (0.1dB)

> show adsl
--------------------------- ATU-R Info (hw: annex A, f/w: annex Unknown) -----------
   Running Mode            : unknown       State                : SHOWTIME
   DS Actual Rate          : 26316000 bps   US Actual Rate       : 8748000 bps
   DS Attainable Rate      :        0 bps   US Attainable Rate   :        0 bps
   DS Path Mode            :        Fast    US Path Mode         :        Fast
   DS Interleave Depth     :        0       US Interleave Depth :        0
   NE Current Attenuation :       21 dB    Cur SNR Margin       :       12 dB
   DS actual PSD           :     8. 3 dB    US actual PSD        :    18. 5   dB
   ADSL Firmware Version   : 05-04-08-00-00-06
-------------------------------- ATU-C Info ---------------------------------
   Far Current Attenuation :        0 dB    Far SNR Margin       :       12 dB
   CO ITU Version[0]       : 00004d43       CO ITU Version[1]    : 0000d3a3
   DSLAM CHIPSET VENDOR    : < unknown >

Seems like there are two conclusions:

a) Telecom's address checker is fairly accurate, kudos.
b) If the majority of providers are offering it, but it seems marginal, with the current policy it seems win-win

Thanks everyone that helped and provided advice (especially Peter, I would've stayed with Telecom, but then honestly, a CSR let everyone down).

dcole13

534 posts

Ultimate Geek

#1065734 14-Jun-2014 21:14

I was trying to get VDSL aswell, loop length around 1.2km, 22.5dB Line Attenuation, and they sent a Chorus guy to install and when he did the first test he told us that we were too far away and there would be no benefit.

Home ADSL: School:

nigelj

856 posts

Ultimate Geek

#1066648 16-Jun-2014 14:34

It seems the last resync dropped me onto a super low latency profile (1ms), speedtest.net now reports 8ms and pinging VF's Google cache box is 5.xx ms away, sounds like a DLM-1 type profile unless I'm mistaken, I NEVER expected that. Stability seems good still too.

hio77

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#1066660 16-Jun-2014 14:42

nigelj: It seems the last resync dropped me onto a super low latency profile (1ms), speedtest.net now reports 8ms and pinging VF's Google cache box is 5.xx ms away, sounds like a DLM-1 type profile unless I'm mistaken, I NEVER expected that. Stability seems good still too.

yes. thats DLM-1.

generally you wanna stick to that profile, although sometimes on a marginal line its better to stick to higher profiles, as often you will be SLIGHTLY faster.

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