I've noticed that routers that have poor SIP implementation tend to have issues. Does the C20 have an issue with multiple simultaneous SIP sessions once it reaches more than, say, 4-5?

Model : Hardware Version : Firmware Version : ISP : Hello, New poster & VoIP technician. I've noticed that TP-Link routers (such as the Archer C20) have issues with VoIP phones. Our system uses SIP...