If you use a firewall that limits access from and/or to certain IPs, please whitelist the IP ranges listed below for both INCOMING and OUTGOING traffic. 


Subnet
Start IP
End IP
185.19.236.0/22
185.19.236.0    
185.19.239.255


Service
Port number
SIP
5060 UDP
5060 TCP

5061 TLS
RTP
ANY PORT - UDP
Provisioning
80 TCP
80 TLS

443 TCP
443 TLS