Client/server channels are dynamic channels, used by WebSphere MQ Everyplace devices and gateways to provide logical connections for sending and receiving data.
Dynamic WebSphere MQ Everyplace client/server channels (as distinct them from the WebSphere MQ client and messaging channels) are bidirectional, and support both synchronous and asynchronous messaging.
Dynamic channels are established by a WebSphere MQ Everyplace queue manager as required. So, although you should be aware of their existence, they are not 'visible', and you do not need to do anything to enable their operation.