VDSL can improve over time

I noticed last night that I was getting a much higher speed test result - 74Mb/s instead of 65Mb/s. Checked tonight and the availability checker has my line syncing at 79.99. It hasn't sync'd at full speed since the first few months I got it back in 2011.

I suppose one or more of my neighbours must've cancelled their service.

In reply to a post by Andrue:

I suppose one or more of my neighbours must've cancelled their service.

Or a few people powered off their routers for a while, when yours did a resync, but that's unlikely. Does your show if you have Vectoring enabled by chance?

In reply to a post by jchamier:

In reply to a post by Andrue:

I suppose one or more of my neighbours must've cancelled their service.

Or a few people powered off their routers for a while, when yours did a resync, but that's unlikely. Does your show if you have Vectoring enabled by chance?

I don't have access to the modem stats but I thought vectoring was only used on long rural lines. Although I'm on the outskirts of town I don't think I'd meet that category. Also worth noting that I'm still using my original HG612. It might be venerable but there's clearly nowt wrong with it

There is only a few vectoring cabs round this way.

None of them is serving a long D side rural cab. They are all very busy cabs with high percentage of VDSL lines off of them.

I’d have to say that your HG612 is past it’s sell by date. Newer modems make a much better fist of negotiating the best from your line.

Vectoring has only been deployed on early trials, or on selected BDUK funded cabinets to increase SuperFast properties passed coverage.

I've seen dozens of examples of modems reporting Vectoring and every single time the cabinet has been a BDUK funded cabinet.

I've never seen it deployed on a commercial cabinet outside the trials.

Even on the BDUK cabinets with Vectoring it is losing its benefit as any 2nd installed DSLAM or VDSL Sidepod does not appear to have Vectoring.

Even if the new 2nd DSLAMS did have Vectoring, Huawei Node level Vectoring (Multi DSLAM Vectoring) doesn't work across different DSLAM models.

Edited by j0hn83 (Fri 08-Jan-21 22:27:57)

"Newer modems make a much better fist of negotiating the best from your line."

I'm very happy with my HG612 and, like the OP's, it's syncing better than ever but if there is something better out there I'd be interested. Can you name names?

Thanks,
John

Yes, try a BT ‘smart hub’. Yes, I know the modem is built in, but you asked for an example of a good ‘un.

In reply to a post by Zarjaz:

There is only a few vectoring cabs round this way.

None of them is serving a long D side rural cab. They are all very busy cabs with high percentage of VDSL lines off of them.

YeahI was under the impression that vectoring was only used to try and squeeze a bit more out of BDUK cabs and Brackley wasn't funded through BDUK.

I’d have to say that your HG612 is past it’s sell by date. Newer modems make a much better fist of negotiating the best from your line.

Well since it's currently apparently sync'd at 79.99 no modem is going to do better than that



Whether it remains at that level or not remains to be seen. I spent six months a year ago with it somewhat higher than normal but then I had some work done on the house and after power was restored it was back to normal.

I'm expecting to get FTTP some time in the next couple of years and 64Mb/s is more than enough for me anyway so for now I'm keeping my ageing HG612. It only has to hold the line for a little bit longer. For what it's worth my router is a Vigor 2762 so if the HG612 does fail I can always change over to that.

Thanks for the comment though

Edited by Andrue (Sat 09-Jan-21 13:24:09)

Well since it's currently apparently sync'd at 79.99 no modem is going to do better than that

I’ve had full 80 sync at my last three addresses, so technically some modems can do better than that 😉

But that’s neither here nor there. If things start playing up before you get to FTTP, try a different modem or modem/router as a first check. Them Huawei tings is well old innit .

In reply to a post by Zarjaz:

Well since it's currently apparently sync'd at 79.99 no modem is going to do better than that

I’ve had full 80 sync at my last three addresses, so technically some modems can do better than that 😉

Interesting. I thought 79999 was the limit. I remember when I first got VDSL the modem (the same one - I had it unlocked for a while) was saying an attainable of low 90s so I thought 79999 was the maximum.

Anyway don't worry, I have made plans for its possible demise. But for now it continues to provide sterling service so I'm happy to leave it be

Could that be a function of the cabinet? From my HG612 I see

# xdslcmd info --stats
xdslcmd: ADSL driver and PHY status
Status: Showtime
Retrain Reason: 1
Last initialization procedure status: 0
Max: Upstream rate = 32330 Kbps, Downstream rate = 97196 Kbps
Bearer: 0, Upstream rate = 20000 Kbps, Downstream rate = 79999 Kbps
Bearer: 1, Upstream rate = 0 Kbps, Downstream rate = 0 Kbps
Link Power State: L0
Mode: VDSL2 Annex B
VDSL2 Profile: Profile 17a
TPS-TC: PTM Mode(0x0)
Trellis: U:ON /D:ON
Line Status: No Defect
Training Status: Showtime
Down Up
SNR (dB): 0.9 9.6
Attn(dB): 15.5 0.0
Pwr(dBm): 12.9 6.8

So for some reason despite having a max attainable of well over 80000, it has synced at 79999 and it has been like that since day one, which is over five years ago now. I would note despite having a g.Fast enabled cabinet I can't order it as I am presumably too far away. I am sure that VDSL 35b would have been a thousand times more sensible than g.Fast. I would be happy if I could get my max theoretical.

Openreach cap the speed to 80/20 as part of the product offering, even though the underlying technology allows somewhat higher speeds.

35b would give much better performance, but can't be deployed because of interference from LLU/ADSL. That is, all other operators would need to remove their ADSL equipment from the copper network first.

You must be pretty close to the cabinet to get those stats, so surprised that you can't get G.Fast. Have you checked some neighbours who are a bit closer?

Hoewver for now, be happy that you have a rock solid 80/20... it's better than most people get

At a guess you are around 400-420m from the cabinet based on attenuation. The oddity is the 0.9 dB downstream SNR - would expect that to be way above 3dB as you have capacity to spare.

I know I was just commenting that I would welcome a package that allows you to float to the maximum. Obviously not everyone would benefit but for at least some of those that would benefit it would be a welcome boost.

I am around 320m cable distance from the VDSL cabinet, back to the cabinet and to the modem in my house as measured using Google maps. Slight guess work on the cable route, but I am pretty confident of the route.

While I accept a rock solid 80/20 is nice, you are factually incorrect to say it is better than most people. Thinkbroadband's own figures say that 64.3% of the UK are able to get an ultrafast (aka better than 100Mbps) connection. As such most people can get a better connection than I do, so not unreasonable to moan a bit

DSL Uptime
46 days 6 hours 40 minutes 19 seconds
DSL Type
VDSL2
DSL Mode
Fast
Line Rate
20 Mbps 79.98 Mbps
Output Power
-4.2 dBm 14.2 dBm
Line Attenuation
1.4, 9.2, 15.5 dB 4.9, 12.4, 20.8 dB
Noise Margin
9.3 dB 8 dB

This is a stable connection at a friends office on FTTC 76/20, Has been like this also for 3-4 years

Edited by thomaswarne01 (Sun 10-Jan-21 22:06:52)

In reply to a post by candlerb:

35b would give much better performance, but can't be deployed because of interference from LLU/ADSL. That is, all other operators would need to remove their ADSL equipment from the copper network first.

35b uses the exact same tone spacing as 17a. It just continues to higher frequencies.

35b would not have needed LLU/ADSL to be touched or removed.
The identical PSD masks and power cut back on the ADSL tones that are used now would be used on 35b.

The point of a 35b rollout is it coexists with 17a. It can even be Vectored between 17a and 35b while leaving ADSL running.

35b can't be deployed because G.Fast was chosen instead.

In reply to a post by jabuzzard:

While I accept a rock solid 80/20 is nice, you are factually incorrect to say it is better than most people. Thinkbroadband's own figures say that 64.3% of the UK are able to get an ultrafast (aka better than 100Mbps) connection.

That's because of Virgin Media. I wouldn't touch them, so I don't count them

In reply to a post by candlerb:

That's because of Virgin Media. I wouldn't touch them, so I don't count them

Many of us don't have a choice, luckily the network in my area doesn't exibit the problems we see in the Thinkbroadband VM forum from other parts of the country.