| Configuring Network Settings | 89
Procedure
1. Do one of the following:
• On your web user interface, go to Network > NAT/Firewall > Reserved Port.
• On your VCS: go to More > Settings > Network Setting > Wired Network > NAT/Firewall >
Reserved Port.
For VP59, tap > Settings > Network Setting > Wired Network > NAT/Firewall > Reserved
Port.
•
On your CTP20/ CTP18, tap > Settings > Network Setting > Host Network > NAT/Firewall >
Reserved Port.
2. Configure and save the following settings:
Parameter Description Configuration Method
UDP Port Scope/
UDP Lowest Port—UDP
Highest Port
Configure the range of the UDP
ports.
Note: the default UDP port
range is from 50000 to 51000.
The configurable port range is
1024-65000.
SIP and H.323 calls share the
configured ports. If you change
this parameter, the system will
reboot to make the change take
effect.
Web user interface
Endpoint
CTP20/CTP18
TCP Port Scope/
TCP Lowest Port—TCP
Highest Port
Configure the range of the TCP
ports.
Note: the default TCP port
range is from 50000 to 51000.
The configurable port range is
1024-65000.
SIP and H.323 calls share the
configured ports. If you change
this parameter, the system will
reboot to make the change take
effect.
Web user interface
Endpoint
CTP20/CTP18
Quality of Service (QoS)
Video conferencing system is subject to the bandwidth and the delay. Therefore, the QoS is very important
for the network having limited bandwidth. QoS is a major issue in VoIP implementations, regarding how to
guarantee 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 QoS
The loss of audio packets, the delay and so on may cause poor audio quality. To solve this, you can
configure DSCP priority for the audio packets.
Video QoS
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