This product is either discontinued or we cannot get that from suppliers.
Poly 38733-01, 6-4 Pin Adapter, Audio Cable, Conductor Copper, Headset Audio Cable Adapter, Specifically designed, EncorePro 500/700 headsets.
The Poly/Plantronics Headset Audio Cable Adapter 38733-01 is an audio cable which consists 6-pin Quick Disconnect Audio connector on first end and 4-pin Quick Disconnect Audio connector on the second end.