Blackwire 5200 Series - USB Headset | Poly, formerly Plantronics & Polycom
Amazon.com: U10P Adapter Polaris Cable Compatible with Plantronics QD Headsets Work with Avaya Digital, Polycom VVX NEC Mitel Shoretel Aastra Digium + More : Electronics
Amazon.com: INNOTALK Wireless Headset Compatible with Poly Polycom VVX300, VVX310, VVX400, VVX410 and Any VVX Model with EHS Remote Answering Cord Bundle(Pioneer) : Electronics