Kitz ADSL Broadband Information
adsl spacer  
Support this site
Home Broadband ISPs Tech Routers Wiki Forum
 
     
   Compare ISP   Rate your ISP
   Glossary   Glossary
 
Please login or register.

Login with username, password and session length
Advanced search  

News:

Author Topic: xdb profiles  (Read 491 times)

twinkletoes

  • Just arrived
  • *
  • Posts: 15
xdb profiles
« on: July 07, 2018, 09:56:32 PM »

Hi Kitzens,

Just wondering how long it takes before the SNR profiles start to lower? I had a 3.4db SNRm before when I was on the BTW network with uno, but ever since swapping to the TTB network with them in January 2018, the OR DLM refuses to try the lower xdb profiles. I have been on a 6.3 (give or take 0.2 in that value) DS SNRm, just find it odd that my line was perfectly fine on a 3.xdb SNRm giving me the full 80/20 sync speeds.

I have had a DLM reset performed yesterday, so I'll keep an eye on my line and see what happens.

Thanks for any advice.

Steve
Logged

Ronski

  • Helpful
  • Kitizen
  • *
  • Posts: 2803
Re: xdb profiles
« Reply #1 on: July 07, 2018, 10:30:13 PM »

Roseway switched provider recently and his took 10 days to get back  to 3dB, but it does vary, my brothers line took much longer.
Logged
Formerly restrained by ECI and ali,  now surfing along at 388/21  ;D

andyfitter

  • Reg Member
  • ***
  • Posts: 158
Re: xdb profiles
« Reply #2 on: July 07, 2018, 11:03:31 PM »

Donít hold your breath. Iíve been waiting since Christmas for xdB on a line that will comfortably support it. Also took 3 months to get g.inp reapplied.
Logged

twinkletoes

  • Just arrived
  • *
  • Posts: 15
Re: xdb profiles
« Reply #3 on: July 07, 2018, 11:35:37 PM »

Thanks for the replies :) I got G.INP applied on the DS within 7 days when I swapped over, so that was pretty good! Also a few days ago I had G.INP on the US for about 24hrs before the DLM decided to turn it off again. It was nice seeing 0 ES on both DS/US. DLM is a mysterious thing in the way it works! :D

Steve
Logged

spring

  • Reg Member
  • ***
  • Posts: 322
Re: xdb profiles
« Reply #4 on: July 08, 2018, 02:01:12 PM »

well upstream G.INP isn't applied unless there are errors, whether or not the DLM is behaving according to your needs is a case of luck

One of the things we noticed is that rather than the usual INP 3, the INP value would be somewhere in the 40-50 region. (which we would expect for G.INP).   It became unbundantly clear during G.INP mk1 that there were far more 'incompatible' modems in use than Openreach anticipated, so they did a botch job by only applying G.INP/INP on the upstream for lines that needed it for stability... and at the same time changing downstream to have INP applied first by default then G.INP at a later date.
« Last Edit: July 08, 2018, 02:07:29 PM by spring »
Logged
No one knows what is the taste of the void.

andyfitter

  • Reg Member
  • ***
  • Posts: 158
Re: xdb profiles
« Reply #5 on: July 08, 2018, 02:26:07 PM »

well upstream G.INP isn't applied unless there are errors, whether or not the DLM is behaving according to your needs is a case of luck

Iím not sure that explains everything in terms of upstream g.inp. Iíve had around 8 dlm resets over the past 4 years. 4 through changing supplier and 4 through faults. After each reset it is a variable amount of time for downstream  g.inp to come back, but every single time I get g.inp downstream, around a week later I get 1 or 2 days of g.inp upstream, but every time it is taken away again. It isnít brought on by errors, it seems as if dlm just gives it a try to see if it makes things Ďbetterí in some way that dlm quantifies. After it goes away it restores the upstream back to the same parameters as previously applied.
« Last Edit: July 08, 2018, 02:28:15 PM by andyfitter »
Logged

spring

  • Reg Member
  • ***
  • Posts: 322
Re: xdb profiles
« Reply #6 on: July 08, 2018, 03:06:23 PM »

well for OP errors were relevant, your experience explains why DLM didn't really decide turning it on, just probing it
Logged
No one knows what is the taste of the void.

j0hn

  • Kitizen
  • ****
  • Posts: 1790
Re: xdb profiles
« Reply #7 on: July 08, 2018, 04:18:49 PM »

I'm my experience DLM applies upstream G.INP after a period of increased upstream ES. Most of the time it removes after a few days.
Some noisier lines keep upstream G.INP all the time.

For the OP, the majority of the time G.INP is applied within a few days of a ISP switch. The target SNRM (xdB) is usually lowered within a few days of that.
If it isn't lowered in the 1st week then it can take months/never/who knows before it might try it.

A DLM reset usually triggers the whole routine to start again and the target SNRM would likely be lowered in the first week.
Getting an ISP to arrange a DLM reset because the SNRM hasn't been lowered is probably a no go though.
Logged
BT FTTC 55/10 ECI now Huawei cab
Zyxel VMG1312-B10A bridge mode with 1508 MTU + Asus RT-AC68U running Asuswrt-Merlin
 

anything