We are upgrading our call-processing engines and request that you allow incoming SIP traffic from our existing individual IPs: 65.254.44.194 and 74.81.71.18, as well as our NEW Subnets: 104.219.162.0/24 and 104.219.163.0/24.
Please ensure continued access for all IP addresses to the UDP port range used by your PBX for RTP. Failing to do so may lead to potential one-way audio issues.