Panasonic KX-NS500 Installation Manual page 100

4.2.5 Installing/Removing the Optional Service Cards
3.
Insert the screws into the holes on the card, and tighten the screws to secure the card.
4.
Connect cables to the appropriate ports of the card. For details about pin assignments, refer to the
appropriate section in "4.6.1 EXP-M Card (KX-NS5130)".
Note
Make sure to connect the cables after installing the card in the PBX, not before.
Removing the EXP-M Card from the EXP-M Card slot
1.
Loosen and remove the screws.
100 Installation Manual
Screws
Screws