Panasonic KX-TDA150 Installation Manual page 52

2.2.8 Attaching a Ferrite Core
Attaching to an Amphenol Connector
For Extension Cards
Pass the cable through the ferrite core, then close the case of the ferrite core. Attach the ferrite core 3 cm away
from the connector. The ferrite core is included with the card.
If you need to open the ferrite core, use a flathead screwdriver to unlatch the case of the ferrite core.
52 Installation Manual
3 cm