I have a Peplink 310 Hw4 running firmware 6.1.2 build 1597. We just upgraded to 500/50 cable service via our local ISP Suddenlink. Upon testing, I am seeing the 50 Mbps upload speeds but I cannot get greater than 50 Mbps download. Is this expected behavior? I was expecting that the 310 should be able to process 350 Mbps. Do I need to do a firmware upgrade to realize higher speeds or am I hardware limited? Thanks in advance for any advice.