Panasonic KX-TDA15

2.2 Installation of the Hybrid IP-PBX
Installation Manual 49
2.2.8 Attaching a Ferrite Core
A ferrite core must be attached when an RJ45 connector is connected to the SIP-GW4 or IP-EXT4 card.
Attaching to an RJ45 Connector
For SIP-GW4/IP-EXT4 Cards
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