1.1 General FeaturesFeature Manual 1291.1.101 Power Failure RestartDescriptionWhen the electricity is turned back on, the PBX restarts and automatically loads stored data.Conditions• In the event of a power failure, PBX memory is protected by a factory-installed lithium battery. There isno memory loss except the memories of Automatic Callback Busy ( 1.1.4 Automatic Callback Busy(Camp-on)), Call Park ( 1.1.19 Call Park), and Redial ( 1.1.105 Redial, Last Number, 1.1.106Redial, Saved Number).Feature Manual References1.1.4 Automatic Callback Busy (Camp-on)1.1.19 Call Park1.1.105 Redial, Last Number1.1.106 Redial, Saved Number1.1.102 Power Failure TransferDescriptionIf the power supply to the PBX fails, specific single line telephones (SLTs) are automatically connected tospecific outside (CO) lines (Power Failure Connections). The PBX will switch from the current connectionsto Power Failure Connections, and all existing conversations will be disconnected.Only outside (CO) line calls handled by Power Failure Connections can be made during a power failure.Conditions• During a power failure, each of the following outside (CO) lines will be connected to an assignedextension.Outside (CO) line 1: extension jack 01Outside (CO) line 4: extension jack 09Outside (CO) line 7: extension jack 17• Only outside (CO) line calls are possible during a power failure. All other features will not function.• We recommend connecting an SLT in parallel at extension jacks 01, 09, and 17, so that the SLT can beused during a power failure.Installation Manual References2.9 Power Failure ConnectionsFeature Manual References1.1.97 Paralleled Telephone