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Videogate is used in large distributed video surveillance systems for routing the video signals among servers and clients (or administrator workstations used as operator workstations) located in different subnetworks. Servers and remote workstations are grouped into different subnetworks due to the following reasons:
- Technical limitations leading to the servers being connected by low band channels and the clients using a high band connection. For example, the servers may be distributed over a large area, while the clients are located in one room of the monitoring center.
- Security requirements. For example, to eliminate unauthorized access to administrative functions, the servers and clients are isolated into a different subnetwork from the operator workstations. When the subsystem interface uses the videogate, the clients(or rather administration workstations used as operator workstations) do not have access to the administrative functions of the servers and administration workstations of another subnetwork, but receive video signals from the servers.
Figures A and B show the schemes of construction of the video surveillance systems directly to the Videoservers with and via the videogate.
A. without the videogate
B. with the videogate
Note.
Video signal transfer to vertical modules on the basis of the Axxon PSIM software is not performing using the Video gate module. These modules always receive video signal directly as others modules.
Important!
There is no sound transmission to the RMW via the Videogate if different subnets are in use.
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