I also have a similar problem with my 50mb connection within the DN33 area, and I have done for a few months now, ever since I upgraded to 50mb.
Restarting the modem will resolve it, but also if I log into the router (WNR2000) and go to Router Status > Connection Status, when the net is down, the DNS server info is lost, hitting the Renew button will get it up and running again, similar to rebooting the modem.
The problem with this is that, either way of fixing it only resolves the issue for a limited time, anywhere between 5 minutes and 5 days. (Tonight I have had to renew the connection 7 times already within the last 2 hours - twice while writing this).
I have spoken to VM a few times in the past, and they say there isn't a fault, and overall aren't very helpful with the issue.
Anyway, here are the signal levels if anyone can tell if there is an issue with them.
Code:
Cable Modem Upstream
US-1 US-2 US-3 US-4
Channel Type 1.0 N/A N/A N/A
Channel ID 3 N/A N/A N/A
Frequency
(Hz) 47400000 N/A N/A N/A
Ranging Status Success N/A N/A N/A
Modulation 16QAM N/A N/A N/A
Symbol Rate
(KSym/sec) 2560 N/A N/A N/A
Mini-Slot Size 2 N/A N/A N/A
Power Level
(dBmV) 58.00 N/A N/A N/A
T1 Timeouts 0
T2 Timeouts 0 0 0 0
T3 Timeouts 3 0 0 0
T4 Timeouts 2 0 0 0
Code:
Cable Modem Downstream
DS-1 DS-2 DS-3 DS-4
Frequency 299000000 307000000 315000000 323000000
Lock Status
(QAM Lock/FEC Sync/MPEG Lock) Y/Y/Y Y/Y/Y Y/Y/Y Y/Y/Y
Channel Id 129 130 131 132
Modulation 256QAM 256QAM 256QAM 256QAM
Symbol Rate
(Msym/sec) 6.952 6.952 6.952 6.952
Interleave Depth I=12
J=17 I=12
J=17 I=12
J=17 I=12
J=17
Power Level
(dBmV) -1.55 -2.31 -2.37 -2.16
RxMER
(dB) 37.94 37.94 37.94 37.94
Correctable
Codewords 0 0 0 0
Uncorrectable
Codewords 298 303 298 272
Thanks
Dan