| VCS Deployment Methods |
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This deployment method involves a simple setup process and creates a stable network environment. However, it is
more expensive due to leased line costs. This method is often used in the head office.
Port Forwarding
The most common scenario is deploying the VCS in an intranet (behind a firewall). You must assign a static private
IP address to the VCS. In the meantime, do port forwarding on the firewall.
Port forwarding is an application of network address translation (NAT) that redirects a communication request from
one address and port number combination to another while the packets are traversing a network gateway, such as a
router or firewall.
To receive a public-to-private call, you must forward the following ports to the public network on your router or
firewall.
Description
Port Range
Port Type
H.323
1719-1720
UDP/TCP
Control and media for audio,
video, content, and data/FECC
50000-51000
TCP/UDP
Web management port (optional)
443
TCP
SIP (optional)
5060-5061
TCP/UDP
Related information
NAT
Many application-layer protocols, for example multimedia protocols (H.323/SIP), have the address or the port
information. The address and port information included in the H.323/SIP protocol cannot be translated via the
traditional NAT method, which leads to communication problems.
ALG (application layer gateway) feature on the router/firewall can help translate the address and the port of
application-layer protocols, which guarantees the accuracy of the communication in the application layer.
If your router does not support ALG feature, you should configure port forwarding on your router first, and then
enable static NAT feature on your system to help the address and the port in the H.323/SIP protocol traverse the
firewall.
Note:
If H.460 firewall traversal is enabled on the system, the system will automatically ignore the static NAT
settings for H.323 calls. For more information, refer to
Configuring H.460 for H.323 Protocol
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Enabling Static NAT for SIP Protocol
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