The Jabra GN1216 cord is the solution for Avaya one-X Deskphone 9600 and 1600 series where microphone volume controls are needed. Jabra GN1216 features eight microphone volume settings ensuring no Jabra corded headset is too high or too low. Simply connect the Jabra GN1216 cord and Jabra headset through the Quick Disconnect (QD) plug and set the microphone level to your preference.