How to connect your headset to your phone.
Jabra PRO 920
Yealink T4U range
To connect your Yealink T4xU range phone to your Jabra PRO 920 Headset follow the above diagram.
You will need to plug the EHS40 into the phones USB port as show.
Then use the Jabra specific cable to connect from the EHS40 to the Jabra PRO 920.