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Jens Lippmann, Marek Rouchal, Martin Wilck and others -->
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<H1><A NAME="SECTION001020000000000000000">
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Device status reports</A>
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Manager subscribes to extension status reports from all channels,
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to be able to generate events when an extension or device changes
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state. The level of details in these events may depend on the channel
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and device configuration. Please check each channel configuration
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file for more information. (in sip.conf, check the section on
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subscriptions and call limits)
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Management communication consists of tags of the form "header: value",
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terminated with an empty newline (\r\n) in
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the style of SMTP, HTTP, and other headers.
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The first tag MUST be one of the following:
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<LI>Action: An action requested by the CLIENT to the Asterisk SERVER.
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Only one "Action" may be outstanding at any time.
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<LI>Response: A response to an action from the Asterisk SERVER to the CLIENT.
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<LI>Event: An event reported by the Asterisk SERVER to the CLIENT