(27 Mar 2016, 9:44 pm)Adrian wrote Could be anything really. If a mast is down, it'll failover to the next one in the cluster or nearest available, depending on how it's configured. This is why we tend not to notice mobile phone network outages.
Voyagers are a blackhole for signal, Though I don't know the reason that causes it, There was a post on a rail forum about it a few months back.