Sometimes the connection will stay up for 2 weeks, some days it will disconnect and reconnect 4 or 5 times. I have been told by Zen customer support that generally this is considered "stable" for VDSL2 because it is an unreliable technology and there's no 100% uptime guarantee. Whilst I understand this, it does seem like a very high level of unreliability considering I had literally months on end with no downtime back when I had ADSL2+ from Be, supposedly one of the less reliable ISPs. These disconnections aren't "invisible" either; for the 30 or so seconds that the disconnection/reconnection occurs, I lose the internet connection; no ping responses, IRC and other protocols requiring a constant connection drop out, etc.
Obviously I'm supposing this is a problem between my modem and the exchange, and not with my ISP, but it still seems bad; my line sounds fine on a quiet line test so why the regular disconnections? I've tried plugging the modem into a filter connected directly to the test socket too, to eliminate the internal wiring as a problem; the disconnections still occurred. I'd appreciate it if people could reply with their experiences; uptime/performance graphs would be good too.
