20M BackHaul Bandwith

So what type of Bandwidth should I expect to see with a 75% downlink ratio set on a 20M Bh?

10.5M Down and 3.5 Up?

I am trying to see if I need to upgrade my BH to 45M or greater?


Those numbers look about right. It will also depend on the quality of the link - if you are not seeing 100% efficiencies then throughput will suffer as packets are lost and/or re-transmitted.