Leitch DVR-3901 Neo, Инструкция по установке и эксплуатации

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50 DVR-3901 Installation and Operation Manual
Chapter 4: Remote Operation
Timeout & Retry Handling
The controller should ignore any responses that don't match the last
command's identification. If the controller does not receive a response
that matches the last command's identification within the protocol's
timeout, it may either retry the failed command using the same
identification number, or proceed to the next command using a new
identification number.
If the
DVR-3901 receives two or more consecutive commands bearing
the same identification numbers, it will only execute and respond to the
first instance, after which it will simply return duplicates of the first
response for every subsequent instance, without actually executing
them.
This gives the controller the option of retrying unacknowledged
commands without the danger of having them executed repeatedly by
the DVR.