Sennheiser Avaya 2420,4600, & 5000 series EHS set up (cat 2162). 1) Plug the cord with the green sticker into the PHON E port in the back of the headset base 2) Plug the cord with the pink sticker into the ACC port in the back of the headset base 3) Plug the other end of the EHS into the HEADSET jack of the phone 4) Plug the last end of the EHS into the AUX port in the back of the phone 5) Set compat to A and move dipswitch #1 down
