Amazon.com: TruVoice 3.5mm Adapter Cable Compatible with All Plantronics and TruVoice QD Headsets - Connects with All Cell Phones and PC/Laptops with a Single 3.5mm Jack Port : Industrial & Scientific
Plantronics Y Training Cord Headset Splitter (27019-03)
How to Pair Plantronics Voyager 5200 | Headphonesaver
Plantronics Headset Replacement Cable - 10 ft Phone Cable for Phone - First End: 1 x 4-pin RJ-11 - Second End: 1 x Proprietary - Black - 1 Each - R&A Office Supplies