I’d like to help, but I haven't had to use call waiting while using my JX10. Check your jabra manual and the commands that your phone allows for a blue tooth headset. I have used redialing successfully, my JX10 manual states for call waiting... " PRESS the answer/end button to put the active call on hold and answer the waiting call... PRESS the answer/end button to switch between the two calls... TAP... THE ANSWER END BUTTON TO END THE ACTIVE CONVERSATION.
The trick is, it seems… is to practice the TAP and the PRESS differential.