DC-09 Preparing for ANSI Public Review - Security Industry ...

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ANSI/SIA DC-09-2013: Internet Protocol Event ReportingAnnex F: Example Transmission Sequences (Informational Annex)Figure: Reference System DiagramThe diagram above provides a reference example for the sequence diagrams, below, which all assume asystem with redundant reporting paths. In this example, the premises equipment has 2 physical paths tocommunicate to the central station. Additionally, the example shows redundant central station receivers,each with a unique fixed IP address. Redundancy like this, along with scheduled test messages tosupervise the various routes (4 in this example), may be required in some applications.F.1 Primary Transmission Path FailureMessages are transmitted first using their primary path, then in case of failure or unavailabilityof the latter, a secondary path.The waiting period for an acknowledgement before retransmitting the message must be set soas to comply with the requirements of approval agencies or other authorities having jurisdiction.Page 26
ANSI/SIA DC-09-2013: Internet Protocol Event ReportingFigure F1F.2 Successful Encrypted TransmissionAn event is transmitted successfullyFigure F2F.3 Primary Receiver FailureNo response to attempt, so transmitter sends to an alternate receiver.Page 27
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DC-09 Preparing for ANSI Public Review - Security Industry ...

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