My line resycned again today after 2 days at the earlier than usual time of 09:14. Alas, MyDSLWebStats didn't notify me by email so it wasn't til later in the day that I noticed! (Edit: the MyDSLWebStats email eventually came through shortly after I posted at 18:41, but confirming the resync at 09:14. Must have been a delay on the email!)
A 3dB SNRM target has now been applied and i'm now syncing at 3.4-3.5dB on the downstream.
Downstream sync increased 2.6Mbit from 77.3Mbit to 77.9Mbit. Technically it's at 79971Kbit - so close to a full 80Mbit! The attainable is around 81-82Mbit so perhaps if I manually resync during a time of 'good' line conditions i'll be able to clamp at the full 80/20. Still, definitely not complaining about syncing a mere 29Kbit out from the max!
Now that i'm on a 3dB SNRM target;
- G-Retransmit Corrections on the downstream are a little more frequent compared to before, but the per minute scale isn't above what it was previously.
- G-Retransmit Uncorrectable has remained at 0, with the exception of that large spike during Saturday's DLM resync for the 4dB SNRM profile application.
- G-LEFTR is around the same as before, with only the odd upstream one jumping to 1, aside again from a large spike during Saturday's DLM for the 4dB SNRM profile application.
Hopefully now that's the last of my DLM initated resyncs and I have a nice stable, fast, low-latency line!
Comparing things now to before I started trying to get G.INP and xdB applied to my line;
- Downstream Sync has jumped from 58Mbit to 80Mbit
- Upstream Sync has jumped from 17Mbit to 20Mbit
- Latency has decreased by 8ms
I'm very pleased with how things have turned out overall. When I first moved here, I never had any expectations that i'd be able to get a (near) full 80/20 sync given that i'm around 550m from the cabinet and have around 16-17dB of attenuation. I'm in a Virgin area so presumably that has helped reduce crosstalk at least, but my experiences here really goes to show just how much of a difference both G.INP and xdB can make to line speeds. A full 22Mbit gain on the downstream is certainly very pleasing!
I'm going to keep an eye on my line and hope that now DLM considers it stable enough to remain at the current sync rates, my other next step now that I am hopefully with a perfect line is to see if I can get Baby Jumbo Frames working with my Zyxel VMG1312-B10A. I will of course keep this thread updated if anything changes with regards to the line!
Thank you once again to everyone here on this thread who has helped me with this and to Kitz for both the general information on the site and providing a forum for knowledgeable users to gather and help out - i'm extremely grateful! I've tried to be as verbose as possible when documenting my issues and how the line has changed over time, and hopefully this will help other users in a similar situation when it comes to what potentially to expect with changes to their line. I've attached a few screenshots of my SNRM, Sync and G-Retransmit Correctable stats over the last 7 days as G.INP and xdB was applied - hopefully that helps illustrate the overall picture. The stats are of course up on MyDSLWebStats - use the dates of the posts here to refine the data view, they should be retained there til around this time 2019. (I also dropped a small
donation to the site, if you've been following this thread either now or in the future and it's helped you out, please also consider dropping a small
donation to support the future of the site
)