BEE calls a remote function via a BEE Connector, which is a construct to send remote calls on the client side and a function entry point on the server side (much like a plug on the appliance and a socket on the wall.)

Two processes are involved in a remote call: the client calls the server, and the server "calls back" the client.  On the client side, the calling process is indicated below:

The "call" command -> Client Connector -> Server Connector -> Remote function

On the server side, the callback process is indicated below:

Remote function "returns" -> Server Connector -> Client Connector -> Callback function