Panasonic KX-TDA100D

Attaching to an RJ11 Connector
For the DMPR Card
Attach 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 PBX.
3 cm
When 2 cables are used for connection, wrap only one of the
cables once around the ferrite core. Then, simply pass the other
cable through the ferrite core.
3 cm
3 cm
When only 1 cable is used for connection, wrap the cable once
around the ferrite core.
Installation Manual 49
2.2.8 Attaching a Ferrite Core