Jabra Link 14201-44 is a NEC DT series phones, including NEC DT-330, DT430, DT-730 and DT-830 compatible with the all Jabra wireless headsets:
For more information. See Jabra Link 44 datasheet
Connect the 4wire audio cable from NEC phone to the headset base (not included with Jabra Link 14201-44).
Connect Link 14201-44 to the side NEC port side 1 connector.
Connect Link 14201-44 to the headset AUX port on Jabra headset base.