[gkhewitt]

With my limited technical experience, I'd hazard a guess that your signal levels aren't quite right.

We had the same trouble a few months ago. We'd be disconnected early evening and then be reconnected later that night (say, 11pm or later).

When an engineer called out he diagnosed dodgy signal levels and gave the explanation that the signals weren't bad enough to cause trouble during the day, but at night when everyone in the area came online, the effects were seen.

So, go to your CM admin webpage and check your levels.