@Stanmiko The fourth one should be the internet light, and it needs to be green when connecting to the internet fine. So in your case, you may check if the WAN/internet cable is plugged securely, be...

@SRove WR850 should not be compatible with the tether app as woozle stated here also: https://community.tp-link.com/en/home/forum/topic/577154

@joshhazel Hi, if you search in the community, you will find your questions has been discussed here and here.

@klchin0705 I believe the instructions provided by Kevin would help: Open Ports for Minecraft Server on Routers

@Hashim_Pathan Is there an issue with the router when connecting to the internet? If no, I guess there is no much information can be found out from the system log you posted.

@Rad4891 How would you like to use the VoIP with the AX55? I mean how do you connect the VoIP device to the AX55, via LAN cable? If that is the case, you may check if there are similar settings on...