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Author Topic: Cabinet re-shell for G.fast  (Read 18287 times)

adslmax

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Re: Cabinet re-shell for G.fast
« Reply #75 on: May 10, 2019, 11:18:14 PM »

I can see someone posted over TTB forum that his line are much similiar to mine with two compared dsl checker below.

His line stats found here: https://forums.thinkbroadband.com/fibre/t/4618162-re-any-gfast-ultrafast-users-here.html

But I have no idea what the default set by Openreach g.fast on the line for the first activated 15dB, 12dB, 6dB or 3dB?

His dsl checker say 200/28 on range A clean but his current stats on modem getting 246/34 with downstream snr set by 12dB but was capped 160/30 by BT and my dsl checker was 211/29 on range A clean but if my line was activated could be go higher than him like 250/35 (if SNR set at 12dB)?

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re0

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Re: Cabinet re-shell for G.fast
« Reply #76 on: May 10, 2019, 11:38:42 PM »

Max, you might be better making a new topic if you have your own questions.

As per my previous post, 3 dB with low retransmission is default to my knowledge. I don't know if that's changed since pilot.

The estimates are not worth getting obsessed with. You will only know the true performance if you get it provisioned.

The reason why their SNR is 12 dB is because they are at the maximum rate for the product. After the upgrade, the DLM should try 3 dB and adjust parameters as necessary. There is no guarantee that it will be stable at 3 dB.
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ISP: Gigaclear - Hyperfast 900 (up to 940 Mbps symmetrical)

re0

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Re: Cabinet re-shell for G.fast
« Reply #77 on: May 20, 2019, 10:57:35 AM »

All up and running with XMG3927-B50A. Seem to be pretty much right on the edge for 330 Mbps, but I hope vectoring will keep it fine. First on the pod, so things can only go down I suppose.

Code: [Select]
xdslctl info --stats
xdslctl: ADSL driver and PHY status
Status: Showtime
Last Retrain Reason:    0
Last initialization procedure status:   0
Max:    Upstream rate = 60504 Kbps, Downstream rate = 337595 Kbps
Bearer: 0, Upstream rate = 50005 Kbps, Downstream rate = 330011 Kbps
Link Power State:       L0
Mode:                   G.fast Annex A
TPS-TC:                 PTM Mode(0x0)
Trellis:                U:ON /D:ON
Line Status:            No Defect
Training Status:        Showtime
                Down            Up
SNR (dB):        3.3             7.1
Attn(dB):        32.1            0.0
Pwr(dBm):        0.0             3.9

Since there is a high possibility of aluminium being present, it makes sense that the distance reading for G.fast is over 1.3x the estimated distance (plus ~20m for drop) by OR's system.

Seems OK, bit worried about Zen's routing which is adding precious milliseconds to my latency. Single-threaded downloads also seem a bit naff. :yuck: Going to see what's up with that.
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ISP: Gigaclear - Hyperfast 900 (up to 940 Mbps symmetrical)

Ronski

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Re: Cabinet re-shell for G.fast
« Reply #78 on: May 20, 2019, 01:59:21 PM »

Nice,  let's hope it stays nice and stable :fingers:
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Formerly restrained by ECI and ali,  now surfing along at 390/36  ;D

re0

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Re: Cabinet re-shell for G.fast
« Reply #79 on: May 22, 2019, 11:02:59 PM »

Switched over to the RJ11 provided with the Zyxel (which is about a meter shorter, but also much thinner) and it made a very small difference - ever so slightly better. I wasn't expecting any real difference, but I wanted to change the cable because my other one was a bit of a squeeze behind the router so thought might as well make a small note of it.

Code: [Select]
xdslctl info --stats
xdslctl: ADSL driver and PHY status
Status: Showtime
Last Retrain Reason:    0
Last initialization procedure status:   0
Max:    Upstream rate = 61552 Kbps, Downstream rate = 338781 Kbps
Bearer: 0, Upstream rate = 50005 Kbps, Downstream rate = 330011 Kbps

Link Power State:       L0
Mode:                   G.fast Annex A
TPS-TC:                 PTM Mode(0x0)
Trellis:                U:ON /D:ON
Line Status:            No Defect
Training Status:        Showtime
                Down            Up
SNR (dB):        3.6             7.5
Attn(dB):        31.0            0.0
Pwr(dBm):        0.0             3.9

I have also attached a "crusty" image of VDSL2 overlayed (inverted) on G.fast HLog on my line. May be of interest to some, but really the attenuation just indicates 200m (which is about right). At least it falls off quite nicely from VDSL2 spectrum.
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ISP: Gigaclear - Hyperfast 900 (up to 940 Mbps symmetrical)

adslmax

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Re: Cabinet re-shell for G.fast
« Reply #80 on: May 23, 2019, 08:29:07 AM »

Zyxel XMG3927-B50A are these modem only or also come with wireless router? As I like this one because it will work with HG612 Modem Stats and Dslstats for useful g.fast full stats for future use. I suppose Zyxel XMG3927-B50A are hard to buy online.
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re0

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Re: Cabinet re-shell for G.fast
« Reply #81 on: May 23, 2019, 01:52:20 PM »

Zyxel XMG3927-B50A is a modem-router combo. So it's has a modem, router and wireless.

HG612 Modem Stats doesn't work with it AFAIK, since it doesn't have xdslctl coded info the program. However, DSLstats will work even if it's not designed to work with G.fast at the moment.
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ISP: Gigaclear - Hyperfast 900 (up to 940 Mbps symmetrical)
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