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