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Broadband down for short time - multiple times


Over the last month or so my internet connection goes completely and then is usually back up and running again after about 5 minutes (sometimes 10). Ethernet and wifi has gone and also the V6 box reports that it can't do a proper search. It's as if the modem is rebooting but I don't think it is.

This morning at exactly 8am it did it again so I checked the Superhub5 and it just had a white light showing and when I checked the logs I saw some strange entries - I've attached a screenshot of part of it.

My internet was back up and running after a few minutes again.


VM Modem Logs.png




I have edited the screenshot and attach it here

VM Modem Logs NO MAC.png


Ir’s just done it again and come back up again 5 or so minutes later.

In the log file I can see stuff like in the screenshot above and stuf like this:-

Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-

SYNC Timing Synchronization failure - Loss of Sync;CM-

16 consecutive T3 timeouts while trying to range on upstream channel 8;CM-

Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM

DHCP WARNING - Non-critical field invalid in response

REG-RSP-MP Mismatch Between Calculated Value for P1.6hi Compared to CCAP Provided Value;CM-

RNG-RSP CCAP Commanded Power in Excess of 6 dB Below the Value Corresponding to the Top of the DRW;

Dynamic Range Window violation



Forum Team
Forum Team

Hi @jgnotts,

Thank you for your posts and welcome back to our community forums. We're here to help.

I'm very sorry to hear that you're experiencing some connection issues recently. I've checked over things on our systems and I'm unable to detect any faults currently that would explain this. How are things for you today? Any better at all?


Zach - Forum Team
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It's not happened again since last Wednesday as far as I know but it tends to happen in batches when it does occur.


Hi @jgnotts 👋.

Thanks for the update on this, do you have further results to show us, if not could you please run diagnostics and please ensure that any third-party equipment such as Hubs and ethernet based WiFi access points are removed.

Keep us updated.