Upload speed issues on Gig1 - 16QAM

[wisedroid]

Hello

Recently upgraded from 600 to Gig1. Download speeds are perfect (only limited by the ethernet port) but upload is about half of what I was getting on 600 - around 20 mbps. I have noticed that the upstream modulation is at 16QAM.

Is it possible for someone at VM to take a look? Appreciate your help.

1	39400000	46.770599	5120 KSym/sec	16QAM	4
2	60300000	47.270599	5120 KSym/sec	16QAM	1
3	46200000	46.770599	5120 KSym/sec	16QAM	3
4	53700000	47.020599	5120 KSym/sec	16QAM	2

[jbrennand]

Try this and see what happens to the qams.
____________________________________

Do a Hub “pinhole reset” - make sure the 2 passwords on the Hub sticker are still there and legible first ! Disconnect any ethernet cables from the Hub (leave the coax connected), and then with the Hub still "switched on" throughout, press pin in firmly with paper clip/SIM tray tool or similar "thin thing" and hold it firmly for at least 60 seconds, release the pin, leave for 5’ to stabilise - dont manually switch it off at any time. See if that sorts it. You will need to use the default password on the Hub sticker to connect on wifi - or change it to what you want in the hub settings

Then, post up 3 FULL sets of data onto here – 2 pages from the Downstream, 2 from the Upstream, & the Network Logs page. Don't worry too much about the formatting it can be easily read & DON’T include personal data or MAC addresses - blank them out - if you copy/paste the data, the board software will do this for you (you may need to click the "submit" button again. If character limits are “exceeded” - just do two posts

If you haven’t already, set up a free, secure and “offlsite” - “Broadband Quality Monitor” to continually monitor the state of your connection and record any true network dropouts , latency issues, packet drops, etc - it will thus allow you to differentiate between those and simple wifi dropouts. It does it 24/7/365 and it keeps a visual record of any/all of your network disconnections, useful data to have to match to the Network logs (in your Hub settings) and also in discussions with VM - note it will take a few hours to start seeing a sensible picture - post up the “link” to the “share live graph”. Click the lower link (Share Live Graph) then click generate. Copy the text in the Direct Link box, beware, there may be more text than you can see. On here click the Link icon (2 links chain to the left of the camera icon) In the URL box paste the link you copied and then click OK

https://www.thinkbroadband.com/broadband/monitoring/quality

[wisedroid]

Thank you for your response. Interestingly the QAM figures are back to 64 but I am still getting slower than expected upload ~30mbps. Here are the current stats which look OK to me and when I get a second later I'll do a full reset. 

3.0 Downstream channels

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

25	330750000	6.300003	40.366287	QAM256	25
1	138750000	5.900002	40.946209	QAM256	1
2	146750000	5.900002	40.366287	QAM256	2
3	154750000	5.900002	40.946209	QAM256	3
4	162750000	5.699997	40.366287	QAM256	4
5	170750000	5.800003	40.946209	QAM256	5
6	178750000	5.800003	40.366287	QAM256	6
7	186750000	5.900002	40.946209	QAM256	7
8	194750000	5.699997	40.946209	QAM256	8
9	202750000	5.500000	40.946209	QAM256	9
10	210750000	5.400002	40.946209	QAM256	10
11	218750000	5.199997	40.946209	QAM256	11
12	226750000	5.300003	40.366287	QAM256	12
13	234750000	5.400002	40.366287	QAM256	13
14	242750000	5.699997	40.366287	QAM256	14
15	250750000	5.900002	40.366287	QAM256	15
16	258750000	6.400002	40.366287	QAM256	16
17	266750000	6.300003	40.366287	QAM256	17
18	274750000	6.300003	40.366287	QAM256	18
19	282750000	6.400002	40.946209	QAM256	19
20	290750000	6.699997	40.366287	QAM256	20
21	298750000	7.099998	40.946209	QAM256	21
22	306750000	7.000000	40.366287	QAM256	22
23	314750000	7.199997	40.946209	QAM256	23
24	322750000	6.800003	40.366287	QAM256	24
26	338750000	6.500000	40.946209	QAM256	26
27	346750000	6.599998	40.366287	QAM256	27
28	354750000	6.500000	40.366287	QAM256	28
29	362750000	5.900002	40.946209	QAM256	29
30	370750000	5.699997	40.366287	QAM256	30
31	378750000	5.699997	40.946209	QAM256	31

3.0 Downstream channels

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

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

[wisedroid]

Refresh data

3.0 Upstream channels

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

1	39400000	46.770599	5120 KSym/sec	64QAM	4
2	60300000	47.270599	5120 KSym/sec	64QAM	1
3	53700000	47.020599	5120 KSym/sec	64QAM	2
4	46200000	46.770599	5120 KSym/sec	64QAM	3

3.0 Upstream channels

Channel Channel Type T1 Timeouts T2 Timeouts T3 Timeouts T4 Timeouts

1	US_TYPE_STDMA	0	0	1	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

Refresh data

Network Log

Time Priority Description

Thu Jan 1 00:01:23 1970	3	No Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
Fri Nov 5 12:29:20 2021	5	MIMO Event MIMO: Stored MIMO=-1 post cfg file MIMO=-1;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
Fri Nov 5 12:32:24 2021	6	SW Download INIT - Via Config file cmreg-vmdg640-bbt078-b.cm
Fri Nov 5 12:33:40 2021	6	SW download Successful - Via Config file
Fri Nov 5 12:36:10 2021	5	MIMO Event MIMO: Stored MIMO=-1 post cfg file MIMO=-1;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
Thu Jan 1 00:01:21 1970	3	No Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
Fri Nov 5 12:42:56 2021	5	MIMO Event MIMO: Stored MIMO=-1 post cfg file MIMO=-1;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
Thu Jan 1 00:01:21 1970	3	No Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
Fri Nov 5 12:53:24 2021	5	MIMO Event MIMO: Stored MIMO=-1 post cfg file MIMO=-1;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
Fri Nov 5 13:11:09 2021	4	DHCP RENEW WARNING - Field invalid in response v4 option;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
Thu Jan 1 00:01:20 1970	3	No Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
Fri Nov 5 13:53:56 2021	5	MIMO Event MIMO: Stored MIMO=-1 post cfg file MIMO=-1;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
Fri Nov 5 13:54:07 2021	5	RCS Partial Service;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
Fri Nov 5 13:54:16 2021	6	CM-STATUS message sent. Event Type Code: 5; Chan ID: 33; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
Thu Jan 1 00:01:22 1970	3	No Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
Fri Nov 5 14:06:46 2021	5	MIMO Event MIMO: Stored MIMO=-1 post cfg file MIMO=-1;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
Thu Jan 1 00:01:20 1970	3	No Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
Fri Nov 5 16:11:35 2021	5	MIMO Event MIMO: Stored MIMO=-1 post cfg file MIMO=-1;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
Sat Nov 6 01:43:28 2021	3	No Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
Sun Nov 7 19:27:56 2021	5	MIMO Event MIMO: Stored MIMO=-1 post cfg file MIMO=-1;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;

[wisedroid]

Pretty sure the log errors are just where I was rebooting to get the Gig1 config after upgrading on Friday 🙂

[jbrennand]

Lets see your BQM.

[wisedroid]

Here you go! Overall connection working well, just seems to be the upload speeds still. A couple of tests have got to the full 50 mbps.

https://www.thinkbroadband.com/broadband/monitoring/quality/share/12a06768d7a85e2a678bc3285e73abb0c18e4323

[url=https://www.thinkbroadband.com/broadband/monitoring/quality/share/12a06768d7a85e2a678bc3285e73abb0c18e4323][img]https://www.thinkbroadband.com/broadband/monitoring/quality/share/thumb/12a06768d7a85e2a678bc3285e73abb0c18e4323.png[/img][/url]

[Lopez89]

---

@wisedroid wrote:

Here you go! Overall connection working well, just seems to be the upload speeds still. A couple of tests have got to the full 50 mbps.

https://www.thinkbroadband.com/broadband/monitoring/quality/share/12a06768d7a85e2a678bc3285e73abb0c18e4323

[url=https://www.thinkbroadband.com/broadband/monitoring/quality/share/12a06768d7a85e2a678bc3285e73abb0c18e4323][img]https://www.thinkbroadband.com/broadband/monitoring/quality/share/thumb/12a06768d7a85e2a678bc3285e73abb0c18e4323.png[/img][/url]

I have spoken to second line support, after waiting 1.5 hours and being transferred to 3 different people, to be told basically Virgin don't care about what upload speed you are getting it's not guaranteed and that there is no problem on my line.

Thing is, I have been told all upstream channels should be 64QAM, I have 1-2 channels at a time that are dropping down to 32QAM. Although second line support told me this is expected behaviour.... It was not like this when first installed so I find it hard to believe this is expected.

I have reset, tried different cables, devices, ensured the coax cables are connected correctly, tried with and without the attenuator fitted by an engineer for my old Hub 3. Still the same issues.

---

[wisedroid]

Sorry to hear that! Yeah I would have thought it reducing means there is some kind of noise on the line which could be investigated.

Today mine seems to be consistently working and the graph looks fine., I'll post back if I have further issues

Speedtest by Ookla - The Global Broadband Speed Test

I assume there are no updates on being able to register for the Hub 5? Would be great to use the full bandwidth via the 2.5g port.

[pjayuk]

Getting a similar issue since I was upgraded from 200 to 350 as part of the VOLT benefits. My downstream is rock solid at all times, but the the upstream QAM gradually drops during the morning to 16 on all channels, giving me approximately 5 mbps instead of 36 mbps. Follows the same pattern every day. Downstream and upstream were rock solid 24/7 before the upgrade.