If you have a firewall on site, you need to ensure that the below IP range and ports are open so our servers can properly communicate with the devices:
VoIP Traffic
IP Range: 162.252.248.0/22
Port Ranges: 5060, 7000, and 16384 - 32768
Transport Protocol: Both UDP and TCP
HTTPS Fax Solution (AudioCodes ATA)
Server IP: 204.232.231.167
Port Ranges: 443, 50, 51, and 52
Transport Protocol: TCP
Call Recording Server - When FTP/SFTP'ing Files to Remote Destination
Server IP: 3.225.109.32
Test Connection IPs: 3.208.213.171, 3.210.239.51
Port Ranges: 21, 22 (FTP and SFTP)
Transport Protocol: TCP