Panasonic KX-TDA15 Installation Manual page 38

2.2 Installation of the Hybrid IP-PBX
4.
Stick an appropriate optional card label (included) to the left side of the corresponding card.
5.
Connect a cable to an appropriate port of the card.
For details about pin assignments, refer to the appropriate section in "2.3 Installation of the Trunk
Cards" and "2.4 Installation of the Extension Cards".
Note
Make sure to connect cables after installing the card in the Hybrid IP-PBX, not before.
38 Installation Manual
Optional Card Label