How to debug Wifi Calling?

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Hi there,I have a very strange behavior with one of my mobile phones.Let me start by describing my setup a little bit.I have 2 locations with 2 separate Wifis.The first Wifi (Wifi1) is a WPA2-PEAP/MSCHAPv2 one. Here a Cisco 240AC is used as access point, a Linux firewall and a Cisco router for Dial-Up. ISP is Deutsche Telekom.The firewall does not block any traffic to or from the mobile devices.The second Wifi (Wifi2) is WPA2-PSK with a Fritzbox as access point and...Read more