External and Internal Devices: Network Topology
The 3CX Phone System frequently communicates across LANs and establishes calls between devices (softphones, hardphones, gateways, VoIP providers, and PBX bridges) which are located on different networks. The PBX communicates both with devices that are inside the PBX's LAN (internal devices), as well as with devices that are outside the PBX's LAN (external devices). 3CX needs to [...]


