Gig1 Fibre Broadband - Slowish Speeds

[Jmste]

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

[Jmste]

Hi @John_GS,

Thank you again for sorting that out for me, hopefully it will be better after the visit. I will keep you updated.

[Jmste]

So engineer visited today, changed some wires etc. and had a look at the power spec which has been altered and I'm still receiving the same kind of speeds.

Now I purchased a Wifi 6 router yesterday (ASUS ZenWifi AX XT8), set it up last night and I was receiving much better speeds than I am now. On Fast.com and Testmynet the speeds were around 800+ sometimes hitting 900+ on ethernet and around 500 on wifi. On my PS5 I was hitting 800+. Speedtest.net was displaying only 500 on my computer and  phone though but I'm sure this was incorrect.

Tbh I should have cancelled the engineer visit but thought it might be worth him coming over to alter the power etc.

I've been told by the engineer that the wire outside going into my house needs changing which has been booked in for 27.09. I'm hoping this will sort it out.

I've checked the stats again and the power levels look good to me although the QAM 3.1 Downstream channels profile looks to be worse? Remember I was on QAM2048? Its now set at QAM256 which I believe its the wrong one! I will update with the new stats below.

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

[Jmste]

3.0 Downstream channels

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

29	363000000	3.500000	40.366287	QAM256	29
32	387000000	2.900002	38.983261	QAM256	32
33	395000000	2.400002	38.983261	QAM256	33
34	403000000	1.900002	38.605377	QAM256	34
4	163000000	10.900002	40.366287	QAM256	4
5	171000000	10.199997	40.366287	QAM256	5
6	179000000	9.800003	40.366287	QAM256	6
7	187000000	9.500000	40.366287	QAM256	7
8	195000000	9.199997	40.946209	QAM256	8
9	203000000	9.000000	40.946209	QAM256	9
10	211000000	8.800003	40.366287	QAM256	10
11	219000000	8.500000	40.946209	QAM256	11
12	227000000	8.199997	40.946209	QAM256	12
13	235000000	7.800003	40.946209	QAM256	13
14	243000000	7.800003	40.946209	QAM256	14
15	251000000	8.000000	40.946209	QAM256	15
16	259000000	8.300003	40.946209	QAM256	16
17	267000000	8.000000	40.366287	QAM256	17
18	275000000	7.400002	40.946209	QAM256	18
19	283000000	7.000000	40.366287	QAM256	19
20	291000000	6.500000	40.946209	QAM256	20
21	299000000	6.199997	40.366287	QAM256	21
22	307000000	6.300003	40.946209	QAM256	22
23	315000000	6.099998	40.946209	QAM256	23
24	323000000	5.800003	40.366287	QAM256	24
25	331000000	5.000000	40.366287	QAM256	25
26	339000000	4.400002	40.366287	QAM256	26
27	347000000	3.900002	40.366287	QAM256	27
28	355000000	3.599998	38.605377	QAM256	28
30	371000000	3.400002	40.366287	QAM256	30
31	379000000	3.200001	40.366287	QAM256	31

3.0 Downstream channels

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

29	Locked	40.366287	0	0
32	Locked	38.983261	0	0
33	Locked	38.983261	5	0
34	Locked	38.605377	0	0
4	Locked	40.366287	0	0
5	Locked	40.366287	0	0
6	Locked	40.366287	0	0
7	Locked	40.366287	0	0
8	Locked	40.946209	0	0
9	Locked	40.946209	0	0
10	Locked	40.366287	0	0
11	Locked	40.946209	0	0
12	Locked	40.946209	7	0
13	Locked	40.946209	0	0
14	Locked	40.946209	0	0
15	Locked	40.946209	0	0
16	Locked	40.946209	0	0
17	Locked	40.366287	6	0
18	Locked	40.946209	0	0
19	Locked	40.366287	0	0
20	Locked	40.946209	0	0
21	Locked	40.366287	0	0
22	Locked	40.946209	0	0
23	Locked	40.946209	8	0
24	Locked	40.366287	0	0
25	Locked	40.366287	0	0
26	Locked	40.366287	0	0
27	Locked	40.366287	0	0
28	Locked	38.605377	0	0
30	Locked	40.366287	0	0
31	Locked	40.366287	0	0

3.1 Downstream channelsChannel Channel Width (MHz) FFT Type Number of Active Subcarriers Modulation (Active Profile) First Active Subcarrier (Hz)

159

96

4K

1880

QAM256

759

3.1 Downstream channelsChannel ID Lock Status RxMER Data (dB) PLC Power (dBmV) Correcteds (Active Profile) Uncorrectables (Active Profile)

159

Locked

36

-6.1

12

0

[Jmste]

3.0 Upstream channels

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

1	60300000	45.020599	5120 KSym/sec	64QAM	9
2	39400000	41.770599	5120 KSym/sec	64QAM	12
3	46200000	43.270599	5120 KSym/sec	64QAM	11
4	53700000	44.270599	5120 KSym/sec	64QAM	10

3.0 Upstream channels

Channel Channel Type T1 Timeouts T2 Timeouts T3 Timeouts T4 Timeouts

1	US_TYPE_STDMA	0	0	0	0
2	US_TYPE_STDMA	0	0	0	0
3	US_TYPE_STDMA	0	0	0	0
4	US_TYPE_STDMA	0	0	0	0

General Configuration

Network access	true
Maximum Number of CPEs	1
Baseline Privacy	true
DOCSIS Mode	3.1
Config file	wrkldJKDHSUBsgvca69834ncxv987

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

[lotharmat]

Your 3.1 channel is knackered!

Power is too low and QAM is 256 - should be 4096

[Jmste]

Yeah I thought so! I guess its either book another engineer out to visit or wait for him to come over on the 27/09! Ideally I would like an engineer over sooner rather than later. 

@John_GS I wonder if you could try and sort our another engineer visit to sort out my 3.1 channel please?

[risc19]

Wow that 3.1 channel got worse.

Also the power levels on your 3.0 channels are between 1.9 and 10.9. Thats too much difference.

On top of that two of those channels are over the limit if 10

[Jmste]

So I noticed at the back of the Hub4 he has fitted a teleste ash-gisx101 (galvanic isolator) which I've never had before. I've removed this and reset the hub4 back to default settings and the power levels on the 3.0 channel look to be far too high (2 are at 10, another 2 at 11 and one at 12!!!).

The 3.1 channel was at QAM256 before I set it to Modem Mode which is now displaying QAM2048 but it seems to change whenever the hub restarts or after a few hours of up time. I saw it at QAM1024 as well as QAM512 earlier. I presume this should never happen and should always be set permanently at QAM4096. Does anyone know how the engineer changes this type of profile? He told me that the QAM is an area type thing, surely this cant be right?!

Thanks for all the help everyone, I think I need another engineer to come out!

[Molly_G]

Hey @Jmste,

Thanks for the updates, I'm very sorry that the issue has persisted.

As our engineering team has identified a cabling issue and booked in the job to fix this, we would not be able to book another visit in the meantime. 

Apologies that an earlier appointment has not been available for this but our team are working to resolve these issues you are experiencing. 

If you do require any further support following this then please do reach out.

Kind regards,