iPhone Wifi Calling using ASA recent IOS

[patrick.hurley]

I am getting one way audio for iPhone Wi-Fi calling.   This started after I used the AnyConnect VPN wizard.  This problem is not over an Anyconnect connection that I am having the issue.  It's within the network connected to a Unifi AP.    I only mentioned the Anyconnect because I used the wizard and I started to get one way audio inside the network going from the inside to outside the network.

[Abheesh Kumar]

Hi,
Are you able to see any udp ports are blocking in ASA for the IP which you are calling.

HTH
Abheesh

[patrick.hurley]

Its more complicated.  ATT built the architecture for routers that support UPnP.   Cisco ASA doesn't support that.  I am stuck on this one unless someone else has configured their ASA to work with WiFi Calling