A communications circuit that can transmit and receive information but not simultaneously.
                                                            
                                                     
                        
                                                
                        
                        
                            A data transmission mode in which a transmission path can carry information in both directions but in only one direction at a time.
                                                            
                                                     
                        
                                                
                        
                        
                            A channel that allows transmission in only one direction at a time, switching back and forth between transmit and receive. Most spread spectrum wireless LAN equipment is Half-Duplex.