[Name] mediadirection [Required] false [Type] ECMAScript Expression [Default Value] both [Description] An ECMAScript expression that defines the direction of the media flow between the Dialog and the Connection or Conference. The following values must be used: both Specifies a full duplex connection where the media flows in both directions. dialogtransmit The dialog transmits media to the Connection or Conference but does not receive any media streams. dialogreceive The dialog receives media from the Connection or Conference but does not transmit any media streams. The bridge does not take place until a subsequent dialogstart is executed, but this attribute may be provided as guidance to the dialog environment for preparation. If no value is specified, the dialog environment must make no assumptions as to the bridging type. For more information about connections and bridges, refer to Section 10 . [Valid Values] 
both dialogtransmit dialogreceive