Upstream channels in freefall

[Ethan_Lister]

As of 10pm last night (and for a brief stint between 10pm and 1am the previous night) my upstream channels 2, 3 and 4 have crippled my connection with large amounts of T3 timeouts and lower than expected modulation (16-32 QAM vs expected 64). My downstream is fine achieving gig1 speeds as expected but my upload speed is down to half a megabit vs expected ~100mbps.

Below is my BQM chart for today. 

[Ethan_Lister]

3.0 Downstream channels

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

1	331000000	5.9	42	QAM 256	25
2	179000000	5.9	42	QAM 256	6
3	187000000	5.9	42	QAM 256	7
4	195000000	6.2	41	QAM 256	8
5	203000000	6.2	41	QAM 256	9
6	211000000	6.4	41	QAM 256	10
7	219000000	6.4	42	QAM 256	11
8	227000000	6.3	42	QAM 256	12
9	235000000	6.2	42	QAM 256	13
10	243000000	6.1	42	QAM 256	14
11	251000000	5.9	42	QAM 256	15
12	259000000	6	42	QAM 256	16
13	267000000	6.1	42	QAM 256	17
14	275000000	6.1	42	QAM 256	18
15	283000000	6.1	42	QAM 256	19
16	291000000	6.2	42	QAM 256	20
17	299000000	6.1	42	QAM 256	21
18	307000000	6.1	42	QAM 256	22
19	315000000	6	42	QAM 256	23
20	323000000	5.9	42	QAM 256	24
21	339000000	5.9	42	QAM 256	26
22	347000000	5.9	42	QAM 256	27
23	355000000	5.9	42	QAM 256	28
24	363000000	5.8	42	QAM 256	29
25	371000000	5.8	42	QAM 256	30
26	379000000	5.8	42	QAM 256	31
27	387000000	5.6	42	QAM 256	32
28	395000000	5.8	42	QAM 256	33
29	403000000	5.7	42	QAM 256	34
30	411000000	5.8	42	QAM 256	35
31	419000000	5.8	42	QAM 256	36

3.0 Downstream channels

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

1	Locked	42	0	0
2	Locked	42	2	0
3	Locked	42	0	0
4	Locked	41	0	0
5	Locked	41	1	0
6	Locked	41	0	0
7	Locked	42	4	0
8	Locked	42	0	0
9	Locked	42	1	0
10	Locked	42	0	0
11	Locked	42	2	0
12	Locked	42	0	0
13	Locked	42	1	0
14	Locked	42	1	0
15	Locked	42	1	0
16	Locked	42	0	0
17	Locked	42	0	0
18	Locked	42	0	0
19	Locked	42	1	0
20	Locked	42	3	0
21	Locked	42	0	0
22	Locked	42	0	0
23	Locked	42	1	0
24	Locked	42	3	0
25	Locked	42	0	0
26	Locked	42	0	0
27	Locked	42	0	0
28	Locked	42	0	0
29	Locked	42	1	0
30	Locked	42	1	0
31	Locked	42	1	0

3.1 Downstream channels

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

37

94

4K

1840

QAM 4096

1108

3.1 Downstream channels

Channel ID Locked Status RxMER Data (dB) PLC Power (dBmV) Corrected errors (Active Profile) Uncorrectable errors (Active Profile)

37

Locked

43

4.4

90033759

0

[Ethan_Lister]

3.0 Upstream channels

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

0	49600000	45.8	5120	QAM 32	7
1	43100000	45.5	5120	QAM 32	8
2	36600000	45	5120	QAM 32	9
3	30100000	45	5120	QAM 32	10
4	23600000	44.3	5120	QAM 32	11

3.0 Upstream channels

Channel Channel Type T1 Timeouts T2 Timeouts T3 Timeouts T4 Timeouts

0	ATDMA	0	0	0	0
1	ATDMA	0	0	0	0
2	ATDMA	0	0	32	0
3	ATDMA	0	0	504	0
4	ATDMA	0	0	2036	0

3.1 Upstream channels

Channel Channel Width (MHz) Power (dBmV) FFT Type Modulation

12

10.4

41.5

2K

QAM 256

3.1 Upstream channels

Channel Channel Type Number of Active Subcarriers First Active Subcarrier (Hz) T3 Timeouts T4 Timeouts

12

OFDMA

208

74000000

0

0

[Ethan_Lister]

I did a pinhole reset only last night at about 11PM. All those T3 timeouts in the upstream channels are since then.

[Ethan_Lister]

Network Log

Time Priority Description

17-08-2024 09:21:31	critical	No Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
17-08-2024 09:21:30	critical	Unicast Maintenance Ranging attempted - No response - Retries exhausted;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
17-08-2024 09:21:30	critical	16 consecutive T3 timeouts while trying to range on upstream channel 0;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
17-08-2024 09:08:43	critical	Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
17-08-2024 09:08:20	critical	No Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
17-08-2024 09:08:19	critical	Unicast Maintenance Ranging attempted - No response - Retries exhausted;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
17-08-2024 09:08:19	critical	16 consecutive T3 timeouts while trying to range on upstream channel 0;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
17-08-2024 09:01:31	critical	Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
17-08-2024 09:01:08	critical	Unicast Maintenance Ranging attempted - No response - Retries exhausted;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
17-08-2024 09:01:08	critical	16 consecutive T3 timeouts while trying to range on upstream channel 0;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
17-08-2024 09:01:08	critical	No Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
17-08-2024 08:54:18	critical	Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
17-08-2024 08:53:56	critical	No Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
17-08-2024 08:53:55	critical	Unicast Maintenance Ranging attempted - No response - Retries exhausted;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
17-08-2024 08:53:55	critical	16 consecutive T3 timeouts while trying to range on upstream channel 0;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
17-08-2024 08:45:48	critical	Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
17-08-2024 08:45:30	critical	No Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
17-08-2024 08:45:28	critical	16 consecutive T3 timeouts while trying to range on upstream channel 0;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
17-08-2024 08:45:28	critical	Unicast Maintenance Ranging attempted - No response - Retries exhausted;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
17-08-2024 08:39:02	critical	Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
17-08-2024 08:38:39	critical	No Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
17-08-2024 08:38:38	critical	16 consecutive T3 timeouts while trying to range on upstream channel 0;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
17-08-2024 08:38:38	critical	Unicast Maintenance Ranging attempted - No response - Retries exhausted;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
17-08-2024 08:28:37	critical	Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
17-08-2024 08:28:13	critical	No Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
17-08-2024 08:28:12	critical	Unicast Maintenance Ranging attempted - No response - Retries exhausted;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
17-08-2024 08:28:12	critical	16 consecutive T3 timeouts while trying to range on upstream channel 0;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
17-08-2024 08:21:24	critical	Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
17-08-2024 08:21:01	critical	No Ranging Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
17-08-2024 08:21:00	critical	Unicast Maintenance Ranging attempted - No response - Retries exhausted;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
17-08-2024 08:21:00	critical	16 consecutive T3 timeouts while trying to range on upstream channel 0;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
17-08-2024 08:14:11	critical	Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;

[Ethan_Lister]

As of 22:43 this evening the upstream channels have gone haywire again, modulation is negotiating at 16QAM and massive packet loss is occurring. The service issues consistently begin around 22:30 every evening and seem to last varying amounts of time.

3.0 Upstream channels

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

0	49600000	46	5120	QAM 16	7
1	43100000	45.8	5120	QAM 16	8
2	36600000	45.3	5120	QAM 16	9
3	30100000	45	5120	QAM 16	10
4	23600000	44.5	5120	QAM 16	11

[Cardiffman282]

Check for local faults on 0800 561 0061.

[Ethan_Lister]

Yeah I did that on day one and nothing was reported as wrong. I have an engineer coming on Monday so perhaps that will help, though I don't believe the fault to be due to equipment within my house.

[Client62]

It can take some time for a fault to be logged and to be reported on 0800 561 0061.
or on  https://www.virginmedia.com/help/check/status/identification/identify 

[Ashleigh_C]

Hi there @Ethan_Lister 

Thank you so much for your post and welcome back to the forums, it's great to have you here. 

I am so sorry that you have faced this issue with your service though I am so glad to hear that you have been able to arrange an engineer. How did the visit go Monday?