We have a small setup, 3 Yealink T46S phones on a Google hosted 3CX. After some time or after an action 2 of the 3 phones go offline. The google VPS is on a dynamic IP address, should that be a fixed one? I keep getting this activilty log message: 01/30/2018 9:43:50 AM - There's another STUN server that resolves to the same IP: ##:3478/UDP fk=0; ignored Is that the reason? In the phone provisioning I made sure the 3 phones have a different port for the "Local SIP Port of Phone" setting. I also made sure the 3 phones have different ranges for the "Local RTP Audio Ports Start" en "Local RTP Audio Ports End" ports. Thx for any help.