Introduction4 Document Version 2011-03About this guideThis guide explains how to operate and customize KX-TGP551. Please be sure your network isconfigured for KX-TGP551. Contact your administrator about the network settings and available features.About the Web user interfaceYou can configure some of the features of this unit through the Web user interface (page 39). You canaccess this interface from a web browser on any computer connected to the network. Contact youradministrator for further information.Emergency callsAll lines including unassigned lines are available for emergency calls if the phone numbers areconfigured in the Web user interface. Availability depends on your phone system. Contact youradministrator for further information.Additional/replacement accessoriesPlease contact your nearest Panasonic dealer for sales information.*1 Replacement batteries may have a different capacity from that of the supplied batteries.Expanding your phone systemAccessory item Order numberRechargeablebatteriesHHR-4DPA *1L To order, please call 1-800-332-5368 or visithttp://www.panasonic.com/batterystoreBattery type:– Nickel metal hydride (Ni-MH)– 2 x AAA (R03) size for each handsetHeadset KX-TCA60, KX-TCA93, KX-TCA94You can expand your phone system by registeringoptional handsets (6 max.) to a single base unit. B04Handset (optional): KX-TPA50