| UNIT 3: INSTALLATION - LESSON 2: INSTALLING OPTIONAL SERVICE CARDS Warning: The KX-TAW848 must be disconnected from AC power when installing any expansion or optional cards. Before installing the KX-TAW848 on the backboard, the SD Memory Card and any expansion or option cards should be installed. SD Memory Card Installation Packaged with the Main Unit is the SD Memory Card that contains the software for all the processes of the system and all the programming data. The SD Memory Card must be inserted before starting the system and should not be inserted or removed while the system power is on. Only the SD Memory Card that is packaged with the Main Unit should be installed into the SD Memory Card Slot of the Main Unit. Let’s insert the SD Memory Card into the Main Unit. Start by confirming the power switch on the Main Unit is in the off position and the Main Unit‘s AC power cord is disconnected from the AC outlet. Then, pull back on the blue Memory Card Slot Cover to access the SD Card Slot. While holding the SD Memory Card with the label facing the front of the Main Unit, push the card until your hear it click into place. Then, close the cover to complete the installation.