We have a customer with an intercom goes connected to the 3cx in the cloud through a sbc. Since the upgrade from V20, when the intercom calls another 3cx user we have no voice. When we call to the intercom, we have voice.
When we use the same setup to that our company to the phone system of the customer, it works. So the customers firewall blocks something. But because it worked with V18, what changed in the traffic that can be blocked?
When we use the same setup to that our company to the phone system of the customer, it works. So the customers firewall blocks something. But because it worked with V18, what changed in the traffic that can be blocked?
