The Jabra GN1221 cord is the solution to the common problem of not being able to connect your headset and telephone. Even though most things have been standardized, the cord connecting the phone with the handset or headset is anything but standard as each telephone manufacturer has its own wiring code. The Jabra GN1200 Series universal smart cords will work with virtually any phone providing greater convenience. Jabra GN1200 Series audio processor cords make it possible to connect virtually any desk phone with Jabras Quick Disconnect (QD) corded headsets. Featuring eight microphone volume settings to ensure that the volume of all outgoing calls is at the same user defined comfortable level.