Is there an adapter to permit one to use an existing Plantronics headset/mic with two plugs? If so, where might one find it?
The combination microphone / headphone port on the ThinkPad Edge (and many other current models) utilizes 4 separate connections within the port. Normal headphones with 3 sections to the pin can be plugged in and will function as normal stereo headphones, but an adapater like the one below is needed in or to make use of both mic and headphone function for combination headphone / mic combinations that have separate plugs. (Those that don't have the correct 4 section plug).