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Hardware requirements

Memory (RAM)4 GB
Bandwidth500 Kbps up / 800 down for 2-person video calls; 500 Kbps up / 1.2 Kbps down for 3- and 4-person video calls
Firewall PortsTCP 443, 17990, 17992, 1025-2048, 5060-5061; UDP 50000-65535
HD ResolutionGraphics capabilities that support HD resolution on one or more displays