| Configuring Network Settings | 70• On your web user interface, go to Network > NAT/Firewall > Reserved Port.• On your VCS:For VC880/VC800/VC500/PVT980/PVT950, go to More > Setting > Advanced > NAT/Firewall >Reserved Port.On your VC200, go to More > Network > Wired Network > NAT/Firewall > Reserved Port.On your VP59, tap Setting > Advanced > NAT/Firewall > Reserved Port.• On your CTP20, tap Setting > Advanced > NAT/Firewall > Reserved Port.2. Configure and save the following settings:Parameter Description Configuration MethodUDP Port Scope/UDP Lowest Port—UDPHighest PortConfigure the range of the UDPports.Note: the default UDP portrange is from 50000 to 51000.The valid value is from1024 to65000.SIP and H.323 calls share theconfigured ports. If you changethis parameter, the system willreboot to make the change takeeffect.Web user interfaceEndpointCTP20TCP Port Scope/TCP Lowest Port—TCPHighest PortConfigure the range of the TCPports.Note: the default TCP portrange is from 50000 to 51000.The valid value is from1024 to65000.SIP and H.323 calls share theconfigured ports. If you changethis parameter, the system willreboot to make the change takeeffect.Web user interfaceEndpointCTP20Quality of Service (QoS)Video conferencing system is subject to the bandwidth and the delay. Therefore, the QoS is very important for thenetwork having limited bandwidth. QoS is a major issue in VoIP implementations, regarding how to guarantee thatpacket traffic is not delayed or dropped due to interference from other lower priority traffic. Your system supports theDiffServ model of QoS.Audio QoSThe loss of audio packets, the delay and so on may cause poor audio quality. To solve this, you can configure DSCPpriority for the audio packets.Video QoSSome issues, such as the video packet loss and delay may cause the video images distorted and unclear. To ensureacceptable visual quality for video, video packets emanated from the system should be configured with a hightransmission priority.
