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Network Distribution of Messages

Open the Network Distribution of Messages dialog to configure the message transfer between cameras. Currently, you can use up to 32 cameras for one physical network for such a message system. This restriction does not apply when using the Broadcast distributor type.

General Interface Setup

Parameter

Description

Network

Activate/deactivate the transfer of messages between cameras over the network.

Password

A password (symmetrical key) of at least six characters, which is used to encrypt the transferred messages.

Distributor type

Two message distribution types are available:

  • Broadcast does not guarantee that the messages are actually received by the recipients ("Fire And Forget"). Transmission errors are not corrected by resending the messages. Messages are not sent to the recipients in a specific order. Note that there is not limitation regarding the number of message system users in a network.

  • Multicast reliably guarantees that the messages are actually received by all recipients in the same order. Transmission errors are corrected by resending the messages. A message is distributed to either all recipients or − if transmission errors are persistent − to no one at all. Note that number of message system recipients in a network is limited to 32.

Settings Depending on the Distributor Type

Depending on the distributor type chosen (Multicast, Broadcast, see above), you can set different options.

Distributor type

Description

Multicast

  • Multicast Port: The messages are transferred using UDP Unicast and Multicast on the specified port and the preceding port. If you want to run several independent message systems on your network, assign different ports to the systems. Make sure that you use ports that are different by at least two numbers.

Broadcast

  • Broadcast Port: The messages are transferred using UDP Broadcast on the specified port. If you want to run several independent message systems on your network, assign different ports to the systems.

  • Recurrence: This parameter specifies how often in total the message will be resent. Many resends increase the probability that the message is actually received, but they also create heavier network load.

  • Poll Frequency: This parameter specifies how often per second the messages will be sent. A higher frequency reduces latency, but creates heavier network load.

  • Max. Time Difference: Maximum difference between the message timestamp and the system time. Messages with a greater difference are discarded. It is highly recommended to synchronize the system time of all message system components using NTP (in the Date and Time dialog).


Storing the Configuration

Click on the Set button to activate your settings and to save them until the next reboot of the camera.

Click on the Factory button to load the factory defaults for this dialog (this button may not be present in all dialogs).

Click on the Restore button to undo your most recent changes that have not been stored in the camera permanently.

Click on the Close button to close the dialog. While closing the dialog, the system checks the entire configuration for changes. If changes are detected, you will be asked if you would like to store the entire configuration permanently.


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