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Jmste
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Gig1 Fibre Broadband - Slowish Speeds

Hi all, hope someone can help.

I upgraded from M350 to Gig1 Fibre Broadband a few weeks ago but I'm not getting the speeds I thought I would. I'm getting around 400-500Mbps on a wired connection in modem mode.

Now *I think* it might be because of my current setup at home. I currently have my VM Hub 4 in Modem Mode downstairs with a CAT6 cable running around 5 meters or so to a TaoTronics Mesh Wi-Fi Router which is placed directly below my bedroom which is then connected to another TaoTronics Mesh Wi-Fi 'node' upstairs in my bedroom by wireless. This one in my bedroom is then connected by Ethernet to my Computer and PS5. I assume because of this I wont be getting the best of speeds? I know on the M350 package I was receiving full speeds with this setup.

The problem is that as my Computer is upstairs I cant test directly to the VM Hub 4 to see if I am receiving the Gig1 and I don't have any laptop to test this. I guess the only way would be to take my PS5 downstairs but unsure if this will display the correct speeds.

Although I had a look at my Hub 4 stats and I don't think they look quite right. I will post them here and see what you think.

Cable Modem StatusItem Status CommentsChannel Overview Downstream Upstream

Cable Modem Status
Online
DOCSIS 3.1
Primary downstream channel
Locked
SC-QAM
DOCSIS 3.0 channels
31
4
DOCSIS 3.1 channels
1
0
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Jmste
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Re: Gig1 Fibre Broadband - Slowish Speeds

3.0 Downstream channels

Channel Frequency (Hz) Power (dBmV) SNR (dB) Modulation Channel ID

253310000000.20000140.946209QAM25625
32387000000-3.59999838.983261QAM25632
33395000000-3.59999838.605377QAM25633
34403000000-3.29999938.983261QAM25634
41630000005.69999740.946209QAM2564
51710000005.00000040.946209QAM2565
61790000004.80000340.366287QAM2566
71870000004.80000340.366287QAM2567
81950000004.40000240.946209QAM2568
92030000004.09999840.946209QAM2569
102110000003.70000140.946209QAM25610
112190000003.20000140.946209QAM25611
122270000003.00000040.366287QAM25612
132350000002.59999840.946209QAM25613
142430000002.59999840.946209QAM25614
152510000002.79999940.366287QAM25615
162590000003.09999840.946209QAM25616
172670000003.00000040.366287QAM25617
182750000002.40000240.366287QAM25618
192830000001.79999940.366287QAM25619
202910000001.40000240.366287QAM25620
212990000001.09999840.366287QAM25621
223070000001.20000140.366287QAM25622
233150000001.09999840.366287QAM25623
243230000000.90000240.366287QAM25624
26339000000-0.29999940.366287QAM25626
27347000000-0.50000040.366287QAM25627
28355000000-0.70000140.366287QAM25628
29363000000-1.09999838.983261QAM25629
30371000000-2.00000038.605377QAM25630
31379000000-3.00000038.983261QAM25631


3.0 Downstream channels

Channel Lock Status RxMER (dB) Pre RS Errors Post RS Errors

25Locked40.94620900
32Locked38.98326100
33Locked38.60537700
34Locked38.98326100
4Locked40.94620900
5Locked40.94620900
6Locked40.36628700
7Locked40.36628700
8Locked40.94620900
9Locked40.94620900
10Locked40.94620900
11Locked40.94620900
12Locked40.36628700
13Locked40.94620900
14Locked40.94620900
15Locked40.36628700
16Locked40.94620900
17Locked40.36628700
18Locked40.36628700
19Locked40.36628700
20Locked40.36628700
21Locked40.36628700
22Locked40.36628700
23Locked40.36628700
24Locked40.36628700
26Locked40.36628700
27Locked40.36628700
28Locked40.36628700
29Locked38.98326100
30Locked38.60537700
31Locked38.98326100
 
3.1 Downstream channelsChannel Channel Width (MHz) FFT Type Number of Active Subcarriers Modulation (Active Profile) First Active Subcarrier (Hz)
159964K1880QAM2048759

3.1 Downstream channelsChannel ID Lock Status RxMER Data (dB) PLC Power (dBmV) Correcteds (Active Profile) Uncorrectables (Active Profile)
159Locked35-12.7267998951
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Jmste
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Re: Gig1 Fibre Broadband - Slowish Speeds

3.0 Upstream channels

Channel Frequency (Hz) Power (dBmV) Symbol Rate (ksps) Modulation Channel ID

16030000046.5205995120 KSym/sec64QAM9
23940000043.2705995120 KSym/sec64QAM12
34620000044.2705995120 KSym/sec64QAM11
45370000045.2705995120 KSym/sec64QAM10


3.0 Upstream channels

Channel Channel Type T1 Timeouts T2 Timeouts T3 Timeouts T4 Timeouts

1US_TYPE_STDMA0000
2US_TYPE_STDMA0000
3US_TYPE_STDMA0000
4US_TYPE_STDMA0000

 

General Configuration

Network access
true
Maximum Number of CPEs
1
Baseline Privacy
true
DOCSIS Mode
3.1
Config file
54k;fg87dsfd;kfoA,.iyewrkldJK


Primary Downstream Service Flow

SFID
2488
Max Traffic Rate
1200000450
Max Traffic Burst
42600
Min Traffic Rate
0


Primary Upstream Service Flow

SFID
236
Max Traffic Rate
55000270
Max Traffic Burst
42600
Min Traffic Rate
0
Max Concatenated Burst
16320
Scheduling Type
bestEffort
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risc19
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Re: Gig1 Fibre Broadband - Slowish Speeds

Hi,

A speed test via a good quality ethernet cable directly to the hub4 to a competent PC should get you around 940mbs download.

Thats the only way to know for sure as it rules out all the other hardware.

However I can see a problem with the 3.1 channel on your hub.

159964K1880QAM2048759

 

The number highlighted should read QAM4096.

The 3.1 channel is what gives you the up to 1gig speed.

The is probably due to noise on the line or power levels out of spec.

This is up to virgin to fix as it's at there end so to speak.

If you haven't already done so try switching it on and off again then recheck this number.

Otherwise wait a few days for virgin to reply here.

 

Did you try the 'sam knows real speed' test?

My Broadband Ping - Gig1 Modem mode
Jmste
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Message 5 of 19
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Re: Gig1 Fibre Broadband - Slowish Speeds

Hi there,

Yeah I thought so, I was thinking with my setup I would receive higher than 400-500mbs as I know my Mesh Router seems to have the really good spec but I just thought with me connecting to another 'node' upstairs this would maybe have issues as its connecting wirelessly. The Mesh Router is TaoTronics Mesh Wi-Fi Router, Tri-Band AC3000 (400Mbps on 2.4GHz + 866Mbps on 5GHz + 1733Mbps on 5.8GHz) & WiFi Speed up to Up to 3Gbps. It also has 4 Ethernet Ports (10/100/1000Mbps).

Also my Computer has the b450 tomahawk max which has a Gigabit LAN controller (Realtek® 8111H) and its displaying in settings 1000/1000.

So no issue with Hardware from what I can see unless I'm missing something!

I had a feeling my stats were showing something incorrect, I have tried switching it off and back on as well as a pinhole reset but not joy it seems.

I haven't used the 'sam knows real speed' as I assume I need to directly Ethernet from my computer to the Hub 4, is that correct? I wont be able to do this due to my setup.

I will await for virgin's response and see what they say first.

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Andrew-G
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Message 6 of 19
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Re: Gig1 Fibre Broadband - Slowish Speeds

Whilst in normal operation the D3.1 QAM should be 4096, the 2048 value won't of itself limit speeds because there's plenty of spare bandwidth - in theory, even 1024 QAM could work, although lower modulation is invariably a sign of other problems, and that's the case here.  The range of power levels looks too wide across the D3.0 channels, the power is far too low on the D3.1 channel and the D3.1 SNR is probably too low for consistent operation.  

I'll mark for staff to advise - unless this is part of a area SNR issue, then it may need a technician visit which they can arrange.  Seems that they can't book a technician based on customer posted data, so you will probably need to put your hub back in router mode in order for them to run remote diagnostics.

Whether that completely fixes the speed issue will depend on the mesh router - Taotronics aren't an established name in routers and mesh systems, and I believe this is still an 802.11ac system, in which case the max speed over wifi via the mesh and a secondary node will be around 450-600 Mbps in typical domestic situations.  Given the so-so mesh, I'm not sure whether the 1 gig upgrade is really giving you much over your previous speed, although that depends on what your use and needs are.  Replacing the mesh with a Wifi 6 system (and ideally Wifi 6e from an established maker) could materially raise the speeds you see if you have Wifi 6 compatible devices, but that'll be relatively expensive.

 

 

John_GS
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Message 7 of 19
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Re: Gig1 Fibre Broadband - Slowish Speeds

Hi Jmste

 

Thanks for posting and welcome to the community.

 

Apologies for the broadband issues. I'll be happy to get a tech out for the downstream levels. 

 

Kind regards,

John_GS
Forum Team


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Jmste
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Message 8 of 19
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Re: Gig1 Fibre Broadband - Slowish Speeds

Hi Andre-G,

Thank you very much marking it for staff to advise, I really appreciate it.

In terms of the Mesh WiFi, that makes sense now! Thanks for the information again. I will have a look at a WiFi 6e system, I have seen the price - very expensive but may be worth it if I can better speeds! Ideally I would like to stay on this package so I guess I could try a WiFi 6e system and if it doesn't work any better I can return.

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Message 9 of 19
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Re: Gig1 Fibre Broadband - Slowish Speeds

Thanks for joining me on PM @Jmste

 

Just to update the thread, the engineer visit was booked in. 

 

This can be tracked or altered in your online account

 

Let us know how the visit goes.

 

Kind regards,

 

 

John_GS
Forum Team


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John_GS
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Message 10 of 19
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Re: Gig1 Fibre Broadband - Slowish Speeds

Hi @Jmste

 

Thanks for messaging but we'll need to keep it public 🙂

 

The tech will know it's an issue with the downstream levels. Whether or not this will solve the issue, it may not but at least we can do is get the levels in spec though 🙂

 

Kind regards,

John_GS
Forum Team


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