DICOM PS3.18 2017e - Web Services

6.9.10.2 Behavior
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#### 6.9.10.2 Behavior

The Origin-Server maintains the active WebSocket connection and uses it to send Event Report messages for UPS Instances which have subscriptions association with {AETitle} (see Section 6.9.7.2).

If the WebSocket connection is lost at any point the User-Agent can re-establish it by repeating the request.

The state of a WebSocket connection does not affect subscriptions and an Origin-Server is not required to queue messages when the connection is down.

### Note

A User-Agent will only receive the initial state of a newly-subscribed UPS Instance if the WebSocket connection was initiated before creating the subscription

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DICOM PS3.18 2017e - Web Services