TP-Link WR1043NDv2 -Gargoyle OS 1.15.x AP,DNS,QoS,Quotas Qualcomm-Atheros Netgear XR500 --DD-WRT 58850 Gateway/DoT,Forced DNS,AP Isolation,4VLAN,Ad-Block,Firewall,Vanilla Netgear R7800 --DD-WRT 58950 Gateway/DoT,AD-Block,Forced DNS,AP&Net Isolation,x3VLAN,Firewall,Vanilla Netgear...
For peak VoIP calling performance you should turn off SIP ALG (Application Layer Gateway). Here's how to disable it on your router step-by-step.