Panasonic KX-TDA0108

2.6 Installation of the Other Cards
Installation Manual 133
2.6.6 MSG4 Card
Function
4-channel message card. To be mounted on the OPB3 card.
Accessory and User-supplied Items
Accessory (included): Screws × 3
User-supplied (not included): none
Screw
MSG4 Card
OPB3 Card
inside