Plantronics Status Indicator - Wired Unified Communications presence light indicator with visual and audio alerts | Poly, formerly Plantronics & Polycom
65116-02 | Plantronics On Line Indicator OLI for Wireless Headsets | Headset Experts
Amazon.com: Busy Beacon Universal Online Indicator and Busy Light for Headsets and Phones, Works with Sennheiser, Plantronics, Jabra, VXI : Electronics