Broadband Dropouts - slow speed– SYNC Timing Errors
I’m experiencing ongoing broadband dropouts that closely resemble the issues described in the following community threads: Broadband connection keeps dropping SYNC Timing Synchronization failure – Loss of Sync My Virgin Media Hub is currently operating in modem mode, and I’m using an ASUS GT-AX11000 router to manage my home network. The dropouts affect both Wi-Fi and wired (LAN) devices, including critical appliances connected directly to the router. Symptoms include: Sudden and repeated loss of internet connectivity across all devices Devices remain connected to the router but lose access to the internet Dropouts occur randomly, sometimes multiple times per day Router logs show normal operation, suggesting the issue is upstream Given the similarity to the SYNC Timing Synchronization failures described in the community posts, I suspect this may be a signal-level or infrastructure issue. I’ve already: Verified all coaxial and Ethernet connections Updated router firmware Monitored logs and confirmed no local faults Could you please: Review the line signal levels and error logs from your end Confirm whether SYNC or RCS errors are present on the hub Advise if an engineer visit is required to inspect the line or cabinet I’d appreciate your support in resolving it promptly. Modem logs: Hub 3.0 device information The information below shows current status of this Hub 3.0. Standard specification compliant : DOCSIS 3.0 Hardware version : 10 Downstream bonded channels Channel Frequency (Hz) Power (dBmV) SNR (dB) Modulation Channel ID 1 139000000 0.7 37 256 qam 1 2 147000000 0.5 38 256 qam 2 3 155000000 -0.4 37 256 qam 3 4 163000000 0 37 256 qam 4 5 171000000 -0.4 37 256 qam 5 6 179000000 -0.2 37 256 qam 6 7 187000000 -0.4 37 256 qam 7 8 195000000 -1 37 256 qam 8 9 203000000 -0.2 38 256 qam 9 10 211000000 -0.5 38 256 qam 10 11 219000000 -0.2 36 256 qam 11 12 227000000 0.2 36 256 qam 12 13 235000000 -0.2 38 256 qam 13 14 243000000 -0.5 38 256 qam 14 15 347000000 1.9 38 256 qam 27 16 355000000 2 38 256 qam 28 17 363000000 1.7 38 256 qam 29 18 371000000 1.5 38 256 qam 30 19 379000000 1.7 38 256 qam 31 20 387000000 1.7 38 256 qam 32 21 395000000 1.2 38 256 qam 34 22 403000000 1.7 38 256 qam 35 23 411000000 1.2 38 256 qam 36 24 419000000 1.2 38 256 qam 37 Downstream bonded channels Channel Locked Status RxMER (dB) Pre RS Errors Post RS Errors 1 Locked 37 37506135 813077 2 Locked 38.6 193431 36024 3 Locked 37.6 53283 2123 4 Locked 37.6 45627 1539 5 Locked 37.6 34557 1907 6 Locked 37.6 22829 1759 7 Locked 37.3 27275 803 8 Locked 37.6 18276 570 9 Locked 38.6 13821 428 10 Locked 38.6 15725 146 11 Locked 36.6 19200 171 12 Locked 36.6 19469 95 13 Locked 38.6 13178 62 14 Locked 38.9 10716 183 15 Locked 38.6 1711 74 16 Locked 38.6 1419 28 17 Locked 38.6 2184 28 18 Locked 38.9 1868 33 19 Locked 38.6 3943 42179 20 Locked 38.6 2769 993 21 Locked 38.6 2838 40 22 Locked 38.6 1801 27 23 Locked 38.6 3640 15572 24 Locked 38.6 1144 18 Upstream bonded channels Channel Frequency (Hz) Power (dBmV) Symbol Rate (ksps) Modulation Channel ID 1 30100000 48.5 5120 64 qam 9 2 36600034 46.8 5120 64 qam 6 3 23600000 48.3 5120 64 qam 10 4 43099997 50.3 5120 64 qam 5 5 49600000 49.8 5120 64 qam 4 Upstream bonded channels Channel Channel Type T1 Timeouts T2 Timeouts T3 Timeouts T4 Timeouts 1 ATDMA 0 0 1 0 2 ATDMA 0 0 2 0 3 ATDMA 0 0 4 0 4 ATDMA 0 0 1 0 5 ATDMA 0 0 0 0 Network Log critical SYNC Timing Synchronization failure - Loss of Sync;CM-
Red light on Hub 3
I've had a red light on my hub for about a month. After speaking to the support and doing all the usual things they ask you, turn it off, reset the hub, check the wires are connected etc. It still stays on from the moment you switch it on. Was told by support this isn't fault, it's stand by?Hub 3.0 Solid Red Light
Hi all, I think this is a fairly common issue but my Hub 3 router (in modem mode) has had a solid red status light now for a few weeks but I hadn't noticed any issues so not bothered about it. However, yesterday and this evening I have noticed WiFi issues from the WiFi router connected. If have checked the WiFi device (TP Link X55) and that all appears fine. Yesterday it was down to sub 1MB though. I have tried the turn off and on again approach and tried resetting but the red light persists. Anyone have any other options? Thanks all.Hub 3 hot weather no Internet
Hi, during hot weather(25°+) my hub 3.0 led shows a steady red and the internet goes. It only comes back on when the weather/temp cools down. This consistently happened every hot weather day the last few weeks. I've had my hub 3.0 about a decade now but this is my first time with this issue. Service status for my area always shows as good. I check all connections and reset everytime but it only works for a min then it goes again. The only thing that solves it is waiting for the weather to cool🙁. It's been in the same spot with lots of space around it for years without issue until now.Overheating box
Hi there, The light on my super hub 3.0 has turned red and with some research tonight I believe it’s supposedly an overheating light. I’ve done the suggested of resetting, making sure it’s ventilated etc. but nothing seems to set it back to proper functioning. From the other posts it seems like it might have to be a router replacement. Wondering if anyone can help me? thanks!WiFi cutting out
Hi, We are new to virgin media broadband. But so far I'm really unimpressed and disappointed with the broadband. We have a hub 3. I've done so of the broadband tests on the app and online, which say it's running fine. Yet my son on his tablet and ps5, as well as our mobile phones, every so often lose connection. Also my son says his ps5 is very laggy. We were with Vodafone before for a few years, on a lower speed to this, but we never had any problems. Can anyone please help? Thank you.Red light on hub
I have a solid red light on my virgin media hub 3 for over 6 months. (The hub is over 8 years old I believe) I’ve also been having issues with my WiFi dropping on a regular basis. I have connected virgin media and I have done a reset of the wifi router recently and have taken out the wires and plugged them in again. They sent me out a new power lead as they said this would resolve the issue, Unfortunately the red light is still coming up as a solid light light and the internet drips out on my devices from time to time.
