Getting exactly the same in Bristol, was issued a new modem (Ambit 256) which didn't resolve the issue. The problem started to occur around a week ago, modem will be fine for all of five mins then the 'ready' light drops out like the modem is rebooting, then nothing for about a min or two.. then back up for five -drops- rinse and repeat.
Rang VM CS again and reported my problem, went through the usual stuff, no luck. Their sending out a tech to me tomorrow morning so hopefully i can get this resolved, will post back with what happ'd, hopefully fixed and can help others with it.
- KFK.
Sidenote ~ I was on the modem config page with one of the times it happend, the frequency for downstream hit something around 850****** when the modem burped o_o? Also it has been tons worse today, pretty much unusable, before after say half an hour it would go back fine, no such luck today. Also! started around 10-11am today, any relation?
(Modem burped whilst typin' this, sorry if it double posts!)