Indicates that the transmit audio channel has been closed.
The occurrence of
StopTx indicates that the remote endpoint has specified to the application server that the transmit RTP audio stream should no longer be sent.
StopTx does not occur until either
MakeCall has been used in a script. This event can occur if the call is placed on hold by the remote endpoint, if it is transferring the call elsewhere.
If this event occurs for a call not currently in a peer-to-peer relationship, then the media engine will stop transmitting audio to the destination with the connection accordingly.
StopTx will still occur for calls currently in a peer-to-peer relationship. However, because there is no media engine connection associated with such calls, the
ConnectionId event parameters would be empty in that case.
The Call Control API makes every effort to abstract the complexities of the underlying telephony protocol; however, one should consult the Call Control Feature Matrix to understand what Call Control actions and action parameters are valid for each of the four supported protocols. One can set installation and deployment guidelines based on the Call Control actions and action parameters that an application uses; the Call Control Feature Matrix makes developing such guidelines feasible.
|Parameter Name||.NET Type||Description|
|CallId||Unique identifier used to identify the call leg that received the command to stop sending media.|
|MmsId||Unique identifier used to identify the media engine in control of this connection. A common use for this ID is to ensure that other connections which will ultimately be conferenced with this connection are all created on the same media engine. This correlation is necessary because all connections in a single conference must all reside on the same media engine. This event parameter will not be populated if the call is in a peer-to-peer relationship.|
|ConnectionId||Unique identifier used to identify this connection in all Media Control API operations. This event parameter will not be populated if the call is in a peer-to-peer relationship.|