Note:R Calls to emergency numbers cannot bemade until key lock is turned off.Power back-up operationWhen a power failure occurs, the chargedhandset temporarily supplies power to thebase unit (power back-up mode). This allowsyou to make and receive calls using a handsetduring a power failure. The base unit will notperform any other functions. You can program“Power Failure” and the default setting is“Auto” (page 26).Important:R If a handset is not placed on the base unitwhen a power failure occurs, “Base nopower Press ” is displayed. Afterpressing M N on the handset, place iton the base unit to start power back-upmode.R Power back-up mode will not work if thebattery level of the power supplyinghandset is / .R Do not lift the power supplying handsetfrom the base unit during power back-upmode.R Do not touch the handset’s charge contactsduring power back-up mode.R If the battery level is low, the unit will notwork sufficiently during power back-upmode. In addition, in case handset batterypower runs out, we recommend connectinga corded-type telephone (without ACadaptor) to the same telephone line or tothe same telephone line jack using aT-adaptor.R Calls cannot be made during a powerfailure until key lock is turned off (page 17).Panasonic Ni-MH batteryperformance (supplied batteries)during power back-up modeWhen the batteries are fully charged,operating time of the handset in powerback-up mode varies depending on usage.– Continuous use of the handset in powerback-up mode: 2 hours max.– Continuous use of the handset other than ahandset in power back-up mode: 3 hoursmax.– Not in use in power back-up mode: 3 hoursmax.Note:R Actual battery performance depends onusage and ambient environment.Making calls during a powerfailuren When only 1 handset is registered:1 Lift the handset and dial the phonenumber.2 Within 1 minute, place the handset onthe base unit.R Wait until speakerphone is turnedon automatically and the call ismade.3 When the other party answers thecall, keep the handset on the baseunit and talk using the speakerphone.4 When you finish talking, pressM N.Note:R In step 2, if you do not place thehandset on the base unit within 1minute, the power back-up mode turnsoff. In this case, press M N on thehandset and dial the phone number.Then try again from step 2.n When 2 or more handsets are registered:You should leave one handset on the baseunit for supplying the power, and useanother handset for making calls. For theoperation, please see “Making calls”,page 16.Note:R During a call with the handset placed onthe base unit (power back-up mode),the call may be disconnected if youtouch the handset. In such case, try tocall back.18Making/Answering Calls