Hi, I should have followed this up. The problem ended up being the switch. It had become non functional since i last tested it the week before. I have replaces the switch and this has fixed the issue. A question though. Does the number of bands selected (D-ext, D-low, D-high) have an effect on the available bandwidth / speed / latency? and is there any information for how to optimize settings in the admin portal to optimize the connection between the two boxes. Thanks