Installation and Settings ......................................................................147Connections ..................................................................................................................147Wall Mounting ................................................................................................................150Bluetooth Headset Connections ..................................................................................153Installation ....................................................................................................................153Bluetooth Headset Operation .......................................................................................155Setting Up the KX-NT400 ..............................................................................................157Accessing the Start-up Settings ...................................................................................157Language Settings .......................................................................................................159IP Address Settings ......................................................................................................159IP Port Settings ............................................................................................................160Quality of Service (QoS) Settings .................................................................................161Maintenance .................................................................................................................162Firmware Version Update .............................................................................................163Setting Initialize ............................................................................................................165Firmware Version .........................................................................................................165Error Log ......................................................................................................................166Maintaining the KX-NT400 ............................................................................................166Data Maintenance ........................................................................................................166Initializing the KX-NT400 ..............................................................................................168Restarting the KX-NT400 .............................................................................................168Cleaning the KX-NT400 ...............................................................................................169Appendix ...............................................................................................170Specifications ................................................................................................................170Programming Items ......................................................................................................171User Options ................................................................................................................171Administrator Options ...................................................................................................176Firmware Version Update ..........................................................................................180SD Memory Cards .........................................................................................................181Important Information ...................................................................................................181Compatible SD Memory Cards .....................................................................................181Inserting and Removing SD Memory Cards .................................................................181Write Protection (LOCK) ...............................................................................................181Formatting SD Memory Cards ......................................................................................182Troubleshooting ............................................................................................................183Common Issues and Solutions .....................................................................................183Error Messages ............................................................................................................192Error Codes ..................................................................................................................193Index............................................................................................................19716 Operating Instructions Document Version 2010-01Table of Contents