Zoom Phone Call Time Limit

[Hiro3]

We have just started using Zoon Phone.  When we call to external numbers, the line connection is always cut after 15-min call. We are investigating the network setting, device setting, client PC setting related, etc in order to remove the call time limit. However we cant resolve it, so far. We really appreciate if you have such experiences and advise us of the solution.  

[ChrisO]

Have you verified your firewall is configured correctly? https://support.zoom.us/hc/en-us/articles/201362683-Network-firewall-or-proxy-server-settings-for-Zo...