| HostSide | Used by transport and codec plug-in authors for sending messages towards the host 
 (originating from the transport). | 
| PluginConstructorParameters | A base interface for parameters passed to the constructor of transport or codec plug-ins. | 
| PluginConstructorParameters.CodecConstructorParameters | A container for parameters passed to the constructor of a codec plug-in. | 
| PluginConstructorParameters.TransportConstructorParameters | A container for parameters passed to the constructor of a transport plug-in. | 
| PluginHost | Interface to support miscellaneous requests from a particular plug-in to the host system. | 
| StatusReporter | An interface allowing a plug-in to report status values to the host. | 
| StatusReporter.StatusItem | An interface that can be used to efficiently update the value associated with a single status key. | 
| TransportSide | Used by codec plug-in authors for sending messages towards the transport  
 (originating from the host). |