As a general matter, you will not need to do anything with these IP addresses, because the provisioning servers will take care of SIP Device configuration. We will provide you with domain names that will resolve to these servers as necessary.In certain situations, however, it may be necessary to allow these ports in your customer's firewall. We recommend utilizing the subnet ranges, as there may be more than one server on one Geo Node that can serve the same function. The following are Subnet Ranges and IP addresses that are in use by our systems:70.42.44.0/24 - Secaucus75.98.50.0/24 - Dallas216.24.144.0/24 - Las Vegas199.21.246.224/27 - Minneapolis207.254.80.0/22 - Overlay207.254.80.0/24 - Atlanta207.254.81.0/24 - Secaucus207.254.82.0/24 - Dallas207.254.83.0/24 - Las Vegas18.209.52.107/32 - Fax ATA54.219.249.208/32 - Fax ATAThe following protocols and ports are used by our systems:ProtocolPort/sUseTCP80, 443Web UI's and provisioning serversTCP80, 442, 443Instant Fax serverUDP5060SIP signalingTCP7000, 7001Fax ATATCP8001Web SocketsTCP8000Text-to-SpeechUDP8889Web Meetings and Video ConferencesUDP17000-35999RTPThe following ports are used by ReachUC:TCP - 443, 4998, 5060, 7080, 24998UDP - 4998, 10000-65535(for RTP/RTCP packets)