Headset cable for Plantronics - Avaya HIS-1 - Mute button | Avaya 1608,1616, 9610, 9620, 9620L, 9620C, 9630, 9630G, 9640, 9640G, 9650, 9670 IP phones IMPROVED AND UPDATED WITH MUTE BUTTON:  Now you can mute your calls! Lighter cord with quick disconnect and in-line MUTE button. You can't do that with the older HIS-1 adapter cable. Compatible with Plantronics Headsets, VXi- P version Headsets and AddaSound Headsets EASY QUICK DISCONNECT:  Allows for easy disconnect from phone without removing headset SAVE BIG!  This new cable is being offered a special introductory price for a limited time MUTE CONTROL: Need to sneeze, take a sip of coffee or prevent loud noises from being heard during conversations? The in-line mute button allows for ease of use. COMPATIBILITY: This HIS-1 cable is designed to be compatible only with the Avaya phones mentioned in the description. It will NOT work with other Avaya models