When Remote Control is in "Gateway Mode" it will establish a connection to the Management Gateway. Afterwards it will keep this connection open by means of a "heartbeat" every 30 seconds or so but otherwise the connection is benign until a Remote Control Viewer connects to it from inside the network. If the connection is interupted then the connection will not be reestablished until remote control on the client (issuser) is launched again.
If remote control on the client (issuser) has been configured with a /resident switch then the connection that's established will be persistant. If the connection is interupted then after period of time an attempt will be made to reestablish the connection and continue the heartbeat once again.