Virgin Media Community

[Seftyby]

For the past few days, have had non exsistant upload speeds and varying download speeds, can't get any work done! Have done all the usual checks etc, am thinking its a line issue, connection details below, I noticed the low modulation on one of the upload channels (16 instead of 64):

Downstream bonded channels

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

1	299000000	6	40	256 qam	21
2	139000000	8.3	40	256 qam	1
3	147000000	7.8	43	256 qam	2
4	155000000	7.8	40	256 qam	3
5	163000000	7.5	43	256 qam	4
6	171000000	7.1	43	256 qam	5
7	179000000	6.8	43	256 qam	6
8	187000000	7.3	40	256 qam	7
9	195000000	6.9	40	256 qam	8
10	203000000	7	40	256 qam	9
11	211000000	7	43	256 qam	10
12	219000000	6.8	40	256 qam	11
13	227000000	6.8	40	256 qam	12
14	235000000	7	43	256 qam	13
15	243000000	6.8	43	256 qam	14
16	251000000	6.6	40	256 qam	15
17	259000000	7	44	256 qam	16
18	267000000	6.8	40	256 qam	17
19	275000000	6.5	44	256 qam	18
20	283000000	6.5	43	256 qam	19
21	291000000	6.3	43	256 qam	20
22	307000000	6.3	43	256 qam	22
23	315000000	6	43	256 qam	23
24	323000000	5.8	40	256 qam	24

  Upstream bonded channels

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

1	39400000	40.3	5120	32 qam	4
2	25799998	38.5	5120	16 qam	6
3	46200041	40.3	5120	64 qam	3

Upstream bonded channels

Channel Channel Type T1 Timeouts T2 Timeouts T3 Timeouts T4 Timeouts

1	ATDMA	0	0	2	0
2	ATDMA	0	0	177	0
3	ATDMA	0	0	0	0

Network Log

Time Priority Description

07/05/2021 18:17:54	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;
07/05/2021 18:17:24	critical	Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
07/05/2021 18:16:34	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;
07/05/2021 18:16:4	critical	Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
07/05/2021 18:15:59	notice	LAN login Success;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
07/05/2021 18:15:14	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;
07/05/2021 18:14:44	critical	Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
07/05/2021 18:14:25	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;
07/05/2021 18:14:25	critical	No Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
07/05/2021 18:13:55	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;
07/05/2021 18:13:25	critical	Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;

[jbrennand]

Not looking good - only 3 up channels - should be 4 and the qam has dropped - and there are far too many T3 errors.

Try this...
______________

First switch the Hub off for 5 minutes AND unplug it from the mains. Whilst it's off, do a quick check that all of your coax cable connections are in nice and "finger" tight - at the Hub and wall box and also at any connectors etc. Ensure there are no “unterminated cable loose ends. Disconnect all the connections and reconnect to be sure. Also check that the internal wiring is ok with no kinking or chaffing, check that all looks good with the outside cabling and wall box. Then switch it on again and leave 5 minutes

Then post up the missing downstream data - i.e. the table with the RS error counts and also the up channel data again

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

[Seftyby]

Thanks for the reply and suggestions, just did all that now and still issues, data again below:

Downstream bonded channels

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

1	299000000	6.3	40	256 qam	21
2	139000000	8.4	40	256 qam	1
3	147000000	7.9	43	256 qam	2
4	155000000	8	40	256 qam	3
5	163000000	7.6	43	256 qam	4
6	171000000	7	43	256 qam	5
7	179000000	7	43	256 qam	6
8	187000000	7.5	40	256 qam	7
9	195000000	7	40	256 qam	8
10	203000000	7	40	256 qam	9
11	211000000	7.1	43	256 qam	10
12	219000000	7	40	256 qam	11
13	227000000	7	40	256 qam	12
14	235000000	7.3	43	256 qam	13
15	243000000	7	43	256 qam	14
16	251000000	6.9	40	256 qam	15
17	259000000	7.1	43	256 qam	16
18	267000000	7	40	256 qam	17
19	275000000	6.6	44	256 qam	18
20	283000000	6.8	44	256 qam	19
21	291000000	6.5	43	256 qam	20
22	307000000	6.5	43	256 qam	22
23	315000000	6.3	43	256 qam	23
24	323000000	6	40	256 qam	24

Downstream bonded channels

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

1	Locked	40.9	0	0
2	Locked	40.9	4	19
3	Locked	43.3	0	0
4	Locked	40.9	4	0
5	Locked	43.3	5	0
6	Locked	43.3	0	0
7	Locked	43.3	0	0
8	Locked	40.9	5	0
9	Locked	40.9	0	0
10	Locked	40.3	5	0
11	Locked	43.3	6	0
12	Locked	40.9	0	0
13	Locked	40.9	0	0
14	Locked	43.3	4	0
15	Locked	43.3	0	0
16	Locked	40.9	0	0
17	Locked	43.3	5	0
18	Locked	40.9	0	0
19	Locked	44.6	0	0
20	Locked	44.6	5	0
21	Locked	43.3	5	0
22	Locked	43.3	5	0
23	Locked	43.3	0	0
24	Locked	40.9	0	0

[Seftyby]

Upstream bonded channels

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

1	39400000	40.3	5120	64 qam	4
2	25799842	37.8	5120	16 qam	6
3	46200056	40.3	5120	64 qam	3

Upstream bonded channels

Channel Channel Type T1 Timeouts T2 Timeouts T3 Timeouts T4 Timeouts

1	ATDMA	0	0	0	0
2	ATDMA	0	0	16	0
3	ATDMA	0	0	0	0

Network Log

Time Priority Description

07/05/2021 19:42:10	critical	Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
07/05/2021 19:42:5	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;
07/05/2021 19:42:5	notice	LAN login Success;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
07/05/2021 19:41:35	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;
07/05/2021 19:41:30	critical	No Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
07/05/2021 19:41:5	Warning!	TCS Partial Service;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
07/05/2021 19:41:5	Warning!	Initializing Channel Timeout Expires - Time the CM can perform initial ranging on all upstream channels in the TCS has expired;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
07/05/2021 19:40:8	critical	No Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
07/05/2021 19:28:36	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;
07/05/2021 19:28:26	critical	No Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
07/05/2021 19:28:6	critical	Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
07/05/2021 19:27:16	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;
07/05/2021 19:27:6	critical	No Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
07/05/2021 19:26:46	critical	Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
07/05/2021 19:25:56	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;
07/05/2021 19:25:46	critical	No Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
07/05/2021 19:25:26	critical	Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
07/05/2021 19:25:6	critical	No Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;
07/05/2021 19:24:56	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;
07/05/2021 19:24:26	critical	Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.0;

[jbrennand]

OK I will flag for VM to come and have a look

[Seftyby]

Thanks for that. Currently can’t do anything at the moment!

[jbrennand]

Not surprised with that connection. It will need a tech visit. It may be a day or so before a VM person gets here - so it may be worth calling it in as it might be quicker - call on 150 (VM Phone - free) or 0345 454 1111 (any other phone - national rate).

Calling at 08.00 midweek (09.00 Sun) is the best time to get through quickly - although worth a shot now?

[Seftyby]

Thanks. 

Is it more likely to be something to do with the cabinet on the road? As nothing has changed my end, just suddenly stopped, unless the router has messed up somehow?

[Ayisha_B]

Hi @Seftyby, 

Welcome to our Community Forums and thanks for posting. 

I am sorry to hear you are having issues with slow speeds. 

I have been unable to locate your account using your Forum info so will pop you a PM now so I can grab some details of you and take a closer look into this. 

Speak soon 🙂 

[Seftyby]

Hi,

Thanks for getting in touch. Just PM’d you now.