HP Poly Online Indicator Light (straight plug)

The Poly Busy Light, Online Indicator or OLI (Straight Plug) part # Poly 80287-01 or HP 85R52AA helps others to know when you are on a call. The light flashes while on an active call. This busy light has a straight plug and is only compatible with Savi and CS500 series wireless headsets and the HL10 handset lifter. Connect to your wireless unit to let other know that you are on your phone. Keeps people from interrupting you while you are speaking with someone on the telephone. Can check if someone is on their line from a distance Headset Compatibility Savi Series WO100, WO200, WO300, WO350 W710, W720, W730, W740 CS500 Series CS510, CS520, CS530, CS540 CS545-XD HL10 lifter Will Not Plug Into: CS50, CS55 CS70N CS351N, CS361N