Place this unit on a flat surface.Allow 10 cm clearance around the unit forproper ventilation.CAUTIONKeep the unit away from heating appliancesand devices that generate electrical noise,such as fluorescent lamps, motors andtelevisions. These noise sources can interferewith the performance of the unit. It also shouldnot be placed in rooms where the temperatureis less than 5 °C or greater than 40 °C.Do not press or rub the LCD touch screen withtoo much force. A light touch is enough for theLCD touch screen to respond.Wipe the unit with a soft cloth. Do not cleanthe unit with abrasive powders or withchemical agents such as benzene or thinner.The SD memory card and the handset hookpose a choking hazard. Keep the SD memorycard and the handset hook out of reach ofchildren.When left unused for a long period of time,disconnect the unit from the AC outlet. Whenthe unit receives power from a PoE powersupply, disconnect the LAN cable.Notice• If the unit does not operate properly, disconnectthe AC adaptor cord and LAN cable and thenconnect again.• If you are having problems making calls,disconnect the Ethernet cable and connect aknown working IP-PT. If the known workingIP-PT operates properly, have the defectiveIP-PT repaired by an authorised Panasonicfactory service centre. If the known workingIP-PT does not operate properly, check the PBXand the Ethernet cable.• Under power failure conditions, the IP-PT maynot operate. Please ensure that a separatetelephone, not dependent on local power, isavailable for use in remote sites in case ofemergency.• If an error message is shown on the unit’sdisplay, consult the network administrator.• Use only the correct Panasonic handset.Data SecurityWe recommend observing the security precautionsdescribed in this section, in order to prevent thefollowing:– loss, disclosure, falsification, or theft of userinformation– unauthorised use of the unit– interference or suspension of use caused by anunauthorised partyWe cannot be responsible for damages resultingfrom the misuse of this product.User information is defined as the following:– Contacts’ names, phone numbers, and IPaddresses– Call logsPreventing Data Loss• Keep a copy of all important data (such as contactlists) in case the machine malfunctions and datacannot be recovered.• Use a personal computer to make periodic backupsof recordings stored on the SD memory card.Preventing Data Disclosure• Do not leave the unit or SD memory card in alocation where it can be accessed or removedwithout authorisation.• Store backups in a secure location.• Do not store sensitive personal information in theunit.• In the following situations, initialise the unit (see"Data Maintenance" on page 174), and remove theSD memory card from the unit.– Before disposing of the unit– Before handing the unit over to a third party– Before having the unit serviced• Make sure the unit is serviced by only a certifiedtechnician.• The confidentiality of the information on the SDmemory card becomes the responsibility of thecustomer. To prevent data leakage, render the SDMemory Card physically unusable before disposal.• When user information is sent from the KX-NT400to a PC or other external device, the confidentialityof that information becomes the responsibility of thecustomer. Before disposing of the PC or otherexternal device, ensure that data cannot be10 Operating InstructionsFor Your Safety