EMA C++ Developers Guide : 4 Consumer Classes : 4.3 OmmConsumerConfig Class : 4.3.2 Unencrypted Connections
 
4.3.2 Unencrypted Connections
The Enterprise Message API supports unencrypted connections via a ChannelType of RSSL_SOCKET (on Linux or Windows), RSSL_WEBSOCKET, and RSSL_HTTP (on Windows only). You set ChannelType inside of a ChannelGroup. For detailed information on ChannelGroup and its ChannelTypes, refer to the Enterprise Message API C++ Configuration Guide.