| Configuring Network Settings | 74Parameter Description Configuration MethodTCP Port Scope/TCP Lowest Port—TCP HighestPortConfigure the range of the TCPports.Note: the default TCP port rangeis from 50000 to 51000. The validvalue is from1024 to 65000.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 importantfor the network with limited bandwidth. QoS is a major issue in VoIP implementations, regarding how toguarantee that packet traffic is not delayed or dropped due to interference from other lower priority traffic.Your system supports the DiffServ model of QoS.Audio QoSThe loss of audio packets, the delay and so on may cause poor audio quality. To solve this, you canconfigure DSCP priority for the audio packets.Video QoSSome issues, such as the video packet loss and delay may cause the video images distorted and unclear. Toensure acceptable visual quality for video, video packets emanated from the system should be configuredwith a high transmission priority.Data QoSTo ensure better presentation, data packets (PC content) emanated from the system should be configuredwith a high transmission priority. DSCPs for audio, video and data packets can be specified respectively.• Configuring QoSConfiguring QoSProcedure1. Do one of the following:• On your web user interface, go to Network > Advanced > QoS.• On your VCS:On your VC880/VC800/VC500/PVT980/PVT950, go to More > Setting > Advanced > AdvancedNetwork > QoS.On your VC200, go to More > Network > Wired Network > Advanced Network > QoS.On your VP59, tap Setting > Advanced > Advanced Network > QoS.• On your CTP20, tap Setting > Advanced > Advanced Network > QoS.
