Plantronics CA12CD *discontinued* and the new CA12CD-S - HeadsetPlus.com Plantronics, Jabra Headset Blog
Plantronics SHS1890-25 (25 ft Coil Headset Cord) 60825-25 – HeadsetLink
H-series Corded Headsets from Plantronics
Plantronics HW520-HIC EncorePro Binaural Over the Head Noise Cancelling Headset with Mic and Plantronics Direct Connect Cable / Office / Headsets - YBSales.com
PC CABLE ADAPTER VOICE CARD TO HEADSET - Office Depot
Plantronics Vista Headset Amplifier (M22)
Using Plantronics H-series Headsets with Plantronics S12 - HeadsetPlus.com Plantronics, Jabra Headset Blog