Panasonic HYBRID IP-PBX KX-TDA50 - Manual (Page 55)

2.2 Installation of the Hybrid IP-PBX
Installation Manual 55
2.2.9 Attaching a Ferrite Core
A ferrite core must be attached when an RJ45 connector is connected to the IP-EXT4 card.
Attaching to an RJ45 Connector
For the IP-EXT4 Card
Wrap the cable once around the ferrite core, then close the case of the ferrite core. Attach the ferrite core 5
cm away from the connector. The ferrite core is included with the card.
5 cm