1.7.1 Install the add-on to the deskphone
• Premium Add-on 10 keys
o Remove the protection of the dedicated compartment behind the set.
o Insert the add-on correctly in the compartment.
o Plug the provided cord into the dedicated sockets behind your set and the add-on (1: ).
o Fix the add-on with the provided screw.
o Restart the deskphone (unplug and plug in the power jack if you are using an external
power adapter or the Ethernet connector – LAN).
• Premium Add-on 40 keys / Premium Smart Display 14 keys:
o Plug the provided cord into the dedicated socket behind your phone and behind the add-
on ( ).
o If desired, fix the foots (set and add-on) with the provided clip.
o Restart the deskphone (unplug and plug in the power jack if you are using an external
power adapter or the Ethernet connector – LAN).
Manage and use the add-on keys as a direct call key. See chapter: Programming your telephone.