WebSphere MQ Telemetry Transport

Start of changeWebSphere® MQ Telemetry Transport is a lightweight publish/subscribe protocol flowing over TCP/IP for remote sensors and control devices through low bandwidth communications.End of change

Start of changeThis protocol is used by specialized applications on small footprint devices that require a low bandwidth communication, typically for remote data acquisition and process control. End of change

Start of changeA typical system might comprise several hundred client devices communicating with a single WebSphere Message Broker, where each client is identified by a unique ID. A single broker can manage a maximum of approximately 2000 clients.End of change

Start of changeClient applications use WebSphere MQ Telemetry Transport to send messages to SCADAInput nodes and receive messages from Publication or SCADAOutput nodes in a message flow.End of change

Start of changeWebSphere Message Broker uses the SCADAInput node to receive messages from WebSphere MQ Telemetry Transport client applications. The node interacts with a TCP/IP port to receive the messages. End of change

Start of changeOutput is typically returned to the client application using a Publication node which embeds a SCADAOutput node. The Publication node filters and sends output from a message flow to subscribers who have registered an interest in a particular set of topics. If an application is using WebSphere MQ, the Publication node puts the message to the WebSphere MQ queue on the queue manager. For WebSphere MQ Telemetry Transport applications, the embedded SCADAOutput node routes the message to a subscribing WebSphere MQ Telemetry Transport client using a TCP/IP port. End of change

z/OS platform SCADAInput nodes are available on all platforms except z/OS®.

Start of changeIt is unlikely that you will use the SCADAOutput node directly, unless you write your own publication node for advanced applications.End of change

Start of changeUnlike WebSphere MQ and WebSphere MQ Everyplace®, WebSphere MQ Telemetry Transport does not provide any security, although you can encrypt data, if required.End of change

The transport is described in the following topics:

Related concepts
WebSphere MQ Telemetry Transport
End-user application support
Message modeling
Related tasks
Enabling WebSphere MQ Telemetry Transport applications
Related reference
Built-in nodes
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Copyright IBM Corporation 1999, 2009Copyright IBM Corporation 1999, 2009.
Last updated : 2009-01-07 15:20:13

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