In a Systems Network Architecture (SNA) environment you can determine who initiates the connection request and who waits for an incoming connection request.
To have your system initiate the connection, configure the controller description to dial the destination. If no connection is established, your controller description switches to answer mode (where it waits for a device to dial into your system).
To have your system wait for incoming calls, configure the controller description to answer the incoming calls. You use dial mode to make connection requests and answer mode to have the system wait for incoming connection requests. You specify one of these modes through the Initial connection (INLCNN) field of the controller description.