Virgin Media Community

[KnotsoLucky]

I have been experiencing low speed and some drop outs for some time. I've tried everything in the book. Do the below look right?

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

1	235000000	-2.5	37	256 qam	13
2	139000000	-0.4	38	256 qam	1
3	147000000	-0.2	38	256 qam	2
4	155000000	-0.5	38	256 qam	3
5	163000000	-0.7	38	256 qam	4
6	171000000	-0.9	38	256 qam	5
7	179000000	-1.2	38	256 qam	6
8	187000000	-1.5	38	256 qam	7
9	195000000	-2.9	37	256 qam	8
10	203000000	-2.2	37	256 qam	9
11	211000000	-2.2	37	256 qam	10
12	219000000	-2.2	37	256 qam	11
13	227000000	-2.4	37	256 qam	12
14	243000000	-2.5	37	256 qam	14
15	251000000	-2.7	37	256 qam	15
16	259000000	-3	37	256 qam	16
17	267000000	-3.2	37	256 qam	17
18	275000000	-3.2	37	256 qam	18
19	283000000	-3.4	37	256 qam	19
20	291000000	-3.2	37	256 qam	20
21	299000000	-3	37	256 qam	21
22	307000000	-3.2	37	256 qam	22
23	315000000	-3.5	37	256 qam	23
24	323000000	-3.7	37	256 qam	24

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

1	Locked	37.6	7	0
2	Locked	38.6	1	0
3	Locked	38.6	3	0
4	Locked	38.6	5	0
5	Locked	38.9	5	0
6	Locked	38.6	5	0
7	Locked	38.9	5	0
8	Locked	38.6	4	0
9	Locked	37.3	0	0
10	Locked	37.6	5	0
11	Locked	37.6	6	0
12	Locked	37.3	5	0
13	Locked	37.6	33	2
14	Locked	37.6	6	0
15	Locked	37.3	4	0
16	Locked	37.3	5	0
17	Locked	37.3	5	0
18	Locked	37.6	5	0
19	Locked	37.3	1	0
20	Locked	37.6	5	0
21	Locked	37.3	7	0
22	Locked	37.3	6	0
23	Locked	37.3	9	0
24	Locked	37.3	1	0

[jbrennand]

Post the Upstream data and the Network Logs as well.

Are your drop out issues evident on a device connected on an ethernet cable at the same time as the wifi ones drop? If youy dont know can you test it?

Also, in the meantime... if you haven’t already, set up a free and secure “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” (as per instructions on the TB website) when it starts to develop.

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

[KnotsoLucky]

Thank you so much!

I don't have any devices that I can connect directly using an ethernet cable. My tower PC is in a room upstairs (only really used for email). My laptop and Apple devices don't have an ethernet port so it's difficult to test. I'm just hoping for a better speed than the average 20mps I've been getting for months.  

Upstream bonded channels

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

1	39400000	45.3	5120	64 qam	4
2	46200000	45.3	5120	64 qam	3
3	53700092	47.3	5120	64 qam	2
4	60300056	47.8	5120	64 qam	1

Upstream bonded channels

Channel Channel Type T1 Timeouts T2 Timeouts T3 Timeouts T4 Timeouts

1	ATDMA	0	0	0	0
2	ATDMA	0	0	0	0
3	ATDMA	0	0	0	0
4	ATDMA	0	0	0	0

I'm not sure how useful the network logs will be as i have been rebooting the router in a vain attempt to see if I can get speeds above 20mps .. et alone 200!

Refresh data

Network LogTime Priority Description

07/02/2021 17:41:0	notice	LAN login Success;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
07/02/2021 16:54:20	critical	Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
07/02/2021 16:52:4	Warning!	RCS Partial Service;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
07/02/2021 16:51:26	Warning!	Lost MDD Timeout;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
07/02/2021 16:51:25	critical	SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
07/02/2021 16:51:25	Warning!	RCS Partial Service;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
07/02/2021 16:51:25	critical	SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
07/02/2021 16:51:5	Warning!	RCS Partial Service;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
07/02/2021 16:51:5	critical	SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
07/02/2021 10:01:2	Warning!	RCS Partial Service;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
07/02/2021 10:01:2	critical	SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
07/02/2021 10:01:1	Warning!	RCS Partial Service;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
07/02/2021 10:01:1	critical	SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
07/02/2021 10:01:0	Warning!	RCS Partial Service;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
07/02/2021 09:30:39	notice	LAN login Success;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
07/02/2021 09:29:35	Warning!	RCS Partial Service;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
07/02/2021 09:29:35	critical	SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
07/02/2021 09:29:34	Warning!	RCS Partial Service;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
07/02/2021 09:29:34	critical	SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
07/02/2021 09:29:32	Warning!	RCS Partial Service;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;

[KnotsoLucky]

This hasn't been running very long so hasn't built up too much of a picture yet..

https://www.thinkbroadband.com/broadband/monitoring/quality/share/c66a46b1849d07567d8f6295d0b9f4db0fb668d2

[KnotsoLucky]

My average speed is below 20mbs, but as you can see it can reach 70mps s so on occasion. Bit disappointing for an expensive M200 package ..

[jbrennand]

All stats look ok & BQM ok - so far.

I am all Apple and I have adapters to connect any of my devices by ethernet - just get one. Or get a 20-50m run of Cat5e cable (less than a tenner) for the Computer upstairs - just trail it over the floor while you run the test for a few hours - as it is looking like it might just be a wifi issue.

If its fine on ethernet (as it looks) then you just need to sort the wifi out with help on here

[KnotsoLucky]

Thank you. Amazing. 

I will acquire an Ethernet adapter and run tests again.  

Looks like I’ll need to cat-5 the whole house then. I’ve got a Virgin Wi-fi booster for the tower PC and I’ve also installed a Dlan whose console is reporting over 100mps between stations. Despite that, I’m lucky to get 20mps on devices.

[sayekm · Accepted solution]

Your downstream power is acceptable but right at the minimum threshold. It be nice to have 0 to +3 IMO. 

I have M200 and get over 210mps over a Wi-Fi mesh. Below are some of my power level.

Personally would not pay for boosters 🙂

Downstream bonded channels

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

1	202750000	3.4	40	256 qam	9
2	210750000	3.2	40	256 qam	10
3	218750000	3.4	40	256 qam	11
4	226750000	3.4	40	256 qam	12

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

1	Locked	40.3	103	0
2	Locked	40.3	95	0
3	Locked	40.3	92	0
4	Locked	40.9	118	0

[KnotsoLucky]

Thanks sayekm

I did think they looked a bit low - which is why I posted here.

Wi-Fi mesh, hmmm. I'm not looking forward to pulling up floorboards and drilling holes all over the house to hardwire everything ..

Thank you

[Adduxi · Accepted solution]

---

@sayekm wrote:

Your downstream power is acceptable but right at the minimum threshold. It be nice to have 0 to +3 IMO. <snip>

---

VM work on -6 to +10, and will not raise a fault on these levels.  While is is "nice" to get around 0, it's not necessary. I've had ranges from -2 to +7 without any issues. Engineers can move your cable connection in the Cabinet at times. 

As John has already stated, a wired connection direct to the Hub will be required for troubleshooting.  Also the PLA's in the equation do not help 😉