During a power failure, specific extension telephones are automatically connected to specificexchange lines. This provides exchange line conversations between the following extensionsand exchange lines.Exchange line 1 : extension port 01Exchange line 4 : extension port 09A single line telephone (SLT) can work in case of a power failure. Connect an SLT to theabove extension port. For more information, refer to the Operating Instructions.• All other conversations, except the above combinations, are disconnected during a powerfailure.• Only an exchange line can have a conversation. All other features do not work.• We recommend connecting a single line telephone (SLT) in parallel at extension ports 01and 09, so that an SLT can be used during a power failure.• Connection Reference2.18 Auxiliary Connection for Power Failure Transfer• Related Feature ReferenceParallelled Telephone Connection• Operating Instructions Reference1.7 Useful Features, “Power Failure Transfer”3-56 FeaturesP 3 Features+Preferred Line Assignment — IncomingA proprietary telephone user can select the method to answer incoming outside calls fromthe following 3 line preferences. System Programming and Proprietary Telephone Settingsare required.No Line Preference: When an incoming call is received, the extension user must gooff-hook and then press the flashing line key.Prime Line Preference: When incoming calls are received at the same time, the usercan receive the call on the preferred exchange line by onlygoing off-hook.Ringing Line Preference: When an incoming call is received, the user can receive thecall ringing at their telephone by going off-hook.• A single line telephone can only set “Ringing Line Preference”.• Line access key(s) (Single Exchange Line, Other Exchange Line or Trunk Group) shouldbe assigned to line key(s) beforehand.• Required System Programming[408]–[410] Flexible Ringing Assignment — Day/Night/Lunch[411]–[413] Delayed Ringing Assignment — Day/Night/Lunch• Related Feature ReferenceLine Access Keys• Operating Instructions References1.2 Proprietary Telephone Settings, “Customising Your Telephone Functions”,Preferred Line Assignment — Incoming1.2 Proprietary Telephone Settings, “Customising the Buttons on Your Telephone”,Line Access Keys+!!Power Failure Transfer!!
