What ports & address should an end-user open in their network to be compatible with Ringotel?
Depending on the organisation's region, a user must be able to communicate with one of the Ringotel servers. You can find the list of Ringotel IPs and regions via this link: https://ringotel.atlassian.net/l/c/QQmbEUGN
Additionally, the following ports must be opened for users for outbound connections:
443 (TCP)
40000-44999 (UDP)