I have 2 VoIP phone systems with RingCentral and all was working near-perfect, then I changed my router. I'm getting some random dropped calls and about 20% of calls come in sounding choppy enough that I can't understand the other party and have to call them back. I've noticed incoming calls are mostly choppy, I haven't experienced a choppy call when outgoing. I have the latest Shibby 1.28 on a brand new Asus RT-N66U. QOS is off by default. My setup is very simple. I have 3 Wifi networks (1x2.4ghz, 1x5ghz, 1x2.4ghz guest) - I also have few non-windows machines with no hostname entered into DNSMasq. All IP addresses are DHCP assigned so they never change. Except for guest computers, they are dynamic. I'm usually scared of QOS because long time ago when QOS was brand new in consumer routers I broke something really bad. So I need helping hand before I touch anything in that area. Ideas?