Too Many Disconnections!
Back again, in desperation! I've been having problems for months, but in the last few weeks it has become progressively worse. After an engineer visit new Hub 5 and (apparently!) a new connection at the cabinet, it has actually gotten worse. I have requested an outdoor survey, as all the equipment in my house has recently been replaced and have another engineer visit provisionally booked for 22 December. However, I am now at the point where I will be requesting an early exit from my contract, as this really is unacceptable. My previous request for help were not progressed as I was running my hub in modem mode, so I have now switched it back to router mode in the hope that some kind of diagnosis might be possible. Here are my logs from less than 12 hours of uptime System up time 0day(s)11h:14m:39s Cable Modem Status Item Status Type Cable Modem Status Online DOCSIS 3.0 Primary downstream channel Locked SC-QAM Channel Overview Downstream Upstream DOCSIS 3.0 channels 31 5 DOCSIS 3.1 channels 1 1 3.0 Downstream channels Channel Frequency (Hz) Power (dBmV) SNR (dB) Modulation Channel ID 1 163000000 7.5 43 QAM 256 4 2 155000000 8 42 QAM 256 3 3 171000000 7.3 43 QAM 256 5 4 179000000 7.2 43 QAM 256 6 5 187000000 7.1 43 QAM 256 7 6 195000000 7.3 43 QAM 256 8 7 203000000 6.9 43 QAM 256 9 8 211000000 6.8 43 QAM 256 10 9 219000000 6.4 43 QAM 256 11 10 227000000 6.2 42 QAM 256 12 11 235000000 6.2 42 QAM 256 13 12 243000000 6.1 43 QAM 256 14 13 251000000 5.8 43 QAM 256 15 14 259000000 5.8 43 QAM 256 16 15 267000000 5.4 43 QAM 256 17 16 275000000 5.3 42 QAM 256 18 17 283000000 5 42 QAM 256 19 18 291000000 4.9 42 QAM 256 20 19 299000000 5 42 QAM 256 21 20 307000000 5 42 QAM 256 22 21 315000000 4.7 42 QAM 256 23 22 323000000 4.7 42 QAM 256 24 23 331000000 4.4 42 QAM 256 25 24 339000000 4.6 42 QAM 256 26 25 347000000 4.6 42 QAM 256 27 26 355000000 4.4 42 QAM 256 28 27 363000000 4.5 42 QAM 256 29 28 371000000 4.6 42 QAM 256 30 29 379000000 4.3 42 QAM 256 31 30 387000000 4.4 43 QAM 256 32 31 395000000 4.3 42 QAM 256 33 3.0 Downstream channels Channel Locked Status RxMER (dB) Pre RS Errors Post RS Errors 1 Locked 43 1305039 326305 2 Locked 42 447669 51730 3 Locked 43 1099552 1437186 4 Locked 43 1427030 1538202 5 Locked 43 830628 1408003 6 Locked 43 23039 45053 7 Locked 43 25310 49669 8 Locked 43 655 86 9 Locked 43 276 45 10 Locked 42 255 103 11 Locked 42 160 109 12 Locked 43 163 96 13 Locked 43 154 110 14 Locked 43 104 37 15 Locked 43 163 8 16 Locked 42 134 26 17 Locked 42 187 0 18 Locked 42 720 49 19 Locked 42 456 16 20 Locked 42 236 0 21 Locked 42 117 0 22 Locked 42 86 0 23 Locked 42 71 0 24 Locked 42 82 0 25 Locked 42 87 0 26 Locked 42 86 0 27 Locked 42 91 0 28 Locked 42 85 0 29 Locked 42 96 0 30 Locked 43 73 0 31 Locked 42 57 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 0 3.0 212999039 0New Hub 5 keeps dropping internet connection
I had a new Hub 5 a few weeks ago (replaced a Hub 3 and briefly a Hub 4) and have now had a few times where the internet just stops for a few minutes, then comes back. During the outages I am able to talk to the Hub 5 quite happily via Wi-Fi and see its status page , so this seems to be some kind of internet/cable modem issue rather than a Wi-Fi problem. All our devices lose internet at the same time, even those cabled into the hub via Ethernet. Note that we had zero problems like this with the Hub 3 for all the time it was here (a week or so prior to the Hub 5 arriving). I had a look in the Hub 5 status pages and during the outages had the following things logged: 24-11-2025 14:22:03 critical Unicast Maintenance Ranging attempted - No response - Retries exhausted;CM-MAC=70:7d:a1:74:e7:45;CMTS-MAC=00:01:5c:7b:ac:54;CM-QOS=1.1;CM-VER=3.1; 24-11-2025 14:22:03 critical 16 consecutive T3 timeouts while trying to range on upstream channel 8;CM-MAC=70:7d:a1:74:e7:45;CMTS-MAC=00:01:5c:7b:ac:54;CM-QOS=1.1;CM-VER=3.1; 24-11-2025 14:19:04 critical Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=70:7d:a1:74:e7:45;CMTS-MAC=00:01:5c:7b:ac:54;CM-QOS=1.1;CM-VER=3.1; 21-11-2025 20:22:41 critical No Ranging Response received - T3 time-out;CM-MAC=70:7d:a1:74:e7:45;CMTS-MAC=00:01:5c:7b:ac:54;CM-QOS=1.1;CM-VER=3.1; 21-11-2025 20:22:40 critical Unicast Maintenance Ranging attempted - No response - Retries exhausted;CM-MAC=70:7d:a1:74:e7:45;CMTS-MAC=00:01:5c:7b:ac:54;CM-QOS=1.1;CM-VER=3.1; 21-11-2025 20:22:40 critical 16 consecutive T3 timeouts while trying to range on upstream channel 8;CM-MAC=70:7d:a1:74:e7:45;CMTS-MAC=00:01:5c:7b:ac:54;CM-QOS=1.1;CM-VER=3.1; 21-11-2025 20:22:34 critical Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=70:7d:a1:74:e7:45;CMTS-MAC=00:01:5c:7b:ac:54;CM-QOS=1.1;CM-VER=3.1; 16-11-2025 11:09:30 critical Unicast Maintenance Ranging attempted - No response - Retries exhausted;CM-MAC=70:7d:a1:74:e7:45;CMTS-MAC=00:01:5c:7b:ac:54;CM-QOS=1.1;CM-VER=3.1; 16-11-2025 11:09:30 critical 16 consecutive T3 timeouts while trying to range on upstream channel 8;CM-MAC=70:7d:a1:74:e7:45;CMTS-MAC=00:01:5c:7b:ac:54;CM-QOS=1.1;CM-VER=3.1; 16-11-2025 11:09:24 critical Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=70:7d:a1:74:e7:45;CMTS-MAC=00:01:5c:7b:ac:54;CM-QOS=1.1;CM-VER=3.1; 14-11-2025 17:20:25 critical Unicast Maintenance Ranging attempted - No response - Retries exhausted;CM-MAC=70:7d:a1:74:e7:45;CMTS-MAC=00:01:5c:7b:ac:54;CM-QOS=1.1;CM-VER=3.1; 14-11-2025 17:20:25 critical 16 consecutive T3 timeouts while trying to range on upstream channel 8;CM-MAC=70:7d:a1:74:e7:45;CMTS-MAC=00:01:5c:7b:ac:54;CM-QOS=1.1;CM-VER=3.1; 14-11-2025 17:20:19 critical Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=70:7d:a1:74:e7:45;CMTS-MAC=00:01:5c:7b:ac:54;CM-QOS=1.1;CM-VER=3.1; None of that means anything to me, but I have found other people with similar issues and this being a total pain to get sorted. I've just called the VM support number and they're going to book a techy to visit on the afternoon of 26th, but being an intermitted fault I suspect it's unlikely it'll do it whilst they're here. The person on the phone saw no issues when they looked at the connection (I'm guessing they don't get to see the Hub logs...) In the 3.0 Downstream Channels bit, one line stands out as significantly different to all the rest: Channel Locked Status RxMER (dB) Pre RS Errors Post RS Errors 8 Locked 39 196 761 All the other channels are at low single digits for Pre RS Errors and zero for Post RS Errors. No idea if that's related? The log messages are talking about upstream channel 8 and the above is downstream channel 8. Also, when we had the Hub 3 fitted years ago, a 6dB attenuator was fitted. I have no idea if that's still needed, I recall the installer saying the signal was a bit strong. Perhaps the Hub 5 would work better with this removed, or maybe it even needs a higher value attenuator? Can anyone tell me what range of numbers I should be looking for in the Downstream or Upstream sections? I'm guessing there's a normal operating range for the dBmV power levels? Thanks for any help, advice and suggestions 😊
Internet only works between certain hours?
My internet connection has only been working properly between roughly 10:09am and 4:01pm every day, and this is now day 5 of the issue. Outside of those hours the service is basically unusable due to the upload speed dropping. I have run multiple speed tests and the pattern is exactly the same every day. Before 10:09am and after 4:01pm, my upload speed sits at around 0.20 Mbps, but between those hours it jumps to around 40 Mbps. I have made countless calls to Virgin Media and am getting nowhere. An engineer is due to visit today between 12pm and 4pm, but I am not hopeful as this clearly is not an isolated fault. I live in a block of flats and multiple neighbours in my block, as well as the block next door, are all affected by the same problem. One neighbour already had an engineer visit yesterday and was given a replacement router, which only worked for about 10 minutes before the issue returned. I am using a Hub 5 and have only been with Virgin Media for two months, so this is incredibly frustrating. Has anyone experienced anything like this before or got any ideas what could be causing such a specific, time-based upload issue? Any advice would be appreciated. Thanks!Intermittent Signal in your area
I’ve noticed in the past week or so that my internet speed has been dropping randomly. I’m meant to be getting 350 download and was up until this last week where now it can drop as low as 100. It seems to fluctuate randomly. When I run a check on the VM app I get the intermittent signal on my area message. Rebooting the hub multiple times doesn’t seem to change anything. any advice or help emojis be greatly appreciated
Hub 5.0 Connection Loss
Hello Community, I've just updated from a hub 3.0 to a hub 5.0 and now I'm saying frequent broadband interruptions. Here are the down stream channels - are these normal? Router status 3.0 Downstream channels Channel Frequency (Hz) Power (dBmV) SNR (dB) Modulation Channel ID 1 194000000 1 39 QAM 256 8 2 138000000 3.5 39 QAM 256 1 3 146000000 2.7 38 QAM 256 2 4 154000000 2.2 38 QAM 256 3 5 162000000 1.7 38 QAM 256 4 6 170000000 1.3 38 QAM 256 5 7 178000000 1.2 38 QAM 256 6 8 186000000 1 39 QAM 256 7 9 202000000 0.8 39 QAM 256 9 10 210000000 0.6 39 QAM 256 10 11 218000000 0.6 39 QAM 256 11 12 226000000 0.3 39 QAM 256 12 13 234000000 0.4 39 QAM 256 13 14 242000000 0.9 39 QAM 256 14 15 250000000 0.8 39 QAM 256 15 16 258000000 0.9 39 QAM 256 16 17 266000000 -1 39 QAM 256 17 18 346000000 -3.3 38 QAM 256 27 19 354000000 -3.5 38 QAM 256 28 20 362000000 -3.9 37 QAM 256 29 21 370000000 -4.4 37 QAM 256 30 22 378000000 -4.7 37 QAM 256 31 23 386000000 -5.1 36 QAM 256 32 24 394000000 -5.7 38 QAM 256 33 25 402000000 -6 38 QAM 256 34 26 410000000 -6 38 QAM 256 35 27 418000000 -6.6 37 QAM 256 36 28 522000000 -10.9 34 QAM 256 37 29 530000000 -10.9 35 QAM 256 38 30 538000000 -10.8 34 QAM 256 39 31 546000000 -10.8 34 QAM 256 40 3.0 Downstream channels Channel Locked Status RxMER (dB) Pre RS Errors Post RS Errors 1 Locked 39 24 0 2 Locked 39 515 20 3 Locked 38 493 18 4 Locked 38 683 76 5 Locked 38 376 19 6 Locked 38 38 0 7 Locked 38 16 0 8 Locked 39 17 0 9 Locked 39 84 0 10 Locked 39 284 0 11 Locked 39 350 11 12 Locked 39 45 0 13 Locked 39 35 0 14 Locked 39 42 0 15 Locked 39 37 0 16 Locked 39 279 17 17 Locked 39 112 0 18 Locked 38 223 0 19 Locked 38 251 0 20 Locked 37 416 0 21 Locked 37 703 0 22 Locked 37 771 0 23 Locked 36 861 0 24 Locked 38 1382 0 25 Locked 38 1554 0 26 Locked 38 1534 0 27 Locked 37 2236 0 28 Locked 34 36026 0 29 Locked 35 36910 0 30 Locked 34 36488 0 31 Locked 34 38684 0 3.1 Downstream channels Channel Channel Width (MHz) FFT Type Number of Active Subcarriers Modulation (Active Profile) First Active Subcarrier (Hz) 41 190 4K 3736 QAM 4096 148 3.1 Downstream channels Channel ID Locked Status RxMER Data (dB) PLC Power (dBmV) Corrected errors (Active Profile) Uncorrectable errors (Active Profile) 41 Locked 0 -21.9 28067657 971484094 Thanks, DDIntermittent service after multiple engineer visits
I'm writing here as I feel I have exhausted any possible avenues through customer services over the past 6 months or so, and I'm currently stuck in an endless loop. After my most recent call today I have a logged yet another complaint, but it seems that the only resolution suggested is to send a third engineer from the same team. For context, I'm running my Hub 5 in modem mode with a third party router, but I've confirmed the issue is still present when using the Hub 5 as a router. To summarise the current situation: At random intervals (this can happen multiple times in a day, or not at all for days) my connection will drop. This typically shows as T3 timeouts (often on all consecutive channels) in the network logs. There is no pattern that I have been able to ascertain. The connection will resume after a minute or so without any action needed, but obviously the the loss of connection will impact on anything I am currently doing (work calls, typically). The quality of my service other than this is fine, and I have no issues with speed or network quality outside of this particular issue. I can't put my finger on when the issue first started occurring, but there have been no changes to equipment or in the house since the connection was originally installed. After doing the usual troubleshooting and confirming there were no apparent issues on my end, the first engineer was sent out. The first engineer rebalanced the signals, as some of the power levels were out of spec. A check was also done on all of the equipment internally and externally. The problem still occurred despite this. After waiting a month or so, I escalated again and a second engineer was sent. The second engineer confirmed the quality of all of the cables and connections, and that there were no apparent issues with my equipment according to their tests. They did check the cabinet and informed me that one of the connections in there was loose (not even finger tight) and that they had rectified that. Unfortunately, the problem has persisted. Ahead of posting this, I set up Broadband Quality Monitoring and waited for the issue to reoccur. This morning it has happened twice, which I believe is reflected there. I've attached images from today of an example of the issue in the logs, as well as the information from the router, the BQM and the results from SamKnows. Removed all IPs and MAC addresses in the images. Any help would be greatly appreciated as customer services have essentially told me there is no issue that they can see.Hub keeps going off / updating
I’m on a Hub 3.0 and everything was perfectly fine until about 3 or 4 days ago. I upgraded my Virgin Media plan from M350 to M500 since I was on a rolling contract, and ever since the change the hub keeps shutting itself off and then rebooting. It’s already happened four or five times while I’ve been home, and my family said it’s also happened a couple of times when I wasn’t around. Each dropout takes a good ten to fifteen minutes before the connection comes back, sometimes longer. At first I assumed it was the hub being updated for the new plan, but this has been going on for days now. When upgrading I believe I was informed the new plan would start from 11th December. As we speak, the connection was lost 10-15 mins ago and I'm using my mobile hotspot to drop this message. Can someone from VM check what’s going on their end?WiFi speed expectations - 1/3 of the speed
Hi All, Just had a problem with my Hub fixed and now have a Hub 5 all working. Engineer said I wasn't getting full 1gb internet speeds but it should improve. I've just checked and I'm getting around 200 this morning, got about 330 yesterday evening. What could be the cause? Any ideas on how to fix?
