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;event : Keyword indicating the event: dialog (subscription to call state events), message-summary (message waiting subsc

A dialog is established, such as INVITE to an request a 2xx response - the action wa

:::The channel ID if the request must be generated in an existing dialog, overrides uri ...resent in a way or another - either specified explicitly or taken from the dialog of a channel ID - else the handler will silently return false.

The supported events are: '''dialog''' and '''message-summary'''. * dialog: boolean: Enable/disable subscriptions to dialog state events. Defaults to enable

:The dialog tag of the received request.

:Keyword indicating the event: dialog (subscription to call state events), message-summary (message waiting subsc ;dialog.id

It is built from SIP dialog data ('Call-ID', 'From' tag, 'To' tag).<br>

; (other then presence) subscriptions e.g. SIP 'dialog' or 'message-summary'

; fork: bool: Follow first forked 2xx answer on early dialogs ; update_target: bool: Update dialog target from Contact in reINVITE

* UPDATE - Modifies a session's state without altering the dialog state. ...ion/dtmf-relay or application/dtmf then it's handled internally. Outside a dialog it's handled generically.

...thing to enable T.38 - it is supported by my upstream provider (which uses Dialogic-SIP). The connection for incoming faxes will start in 'classic' SIP mode

...dard SIP headers, however critical headers (those used by transactions and dialogs) cannot be modified.

... PWLib we have to add the next paths for Open H323 using the Tools-Options dialogue: