Saving Money with VoIP: You can now maximize the value of Voice over Internet Protocol (VoIP) communications with the Plantronics USB VoIP headsets and the DA Series USB-to-Headset Adapters. When you combine any Plantronics professional headset, the adapters enable softphone users to conduct crisp, cost-effective client interactions. A tiered range of solutions helps meet the budget and business requirements of every VOIP-based organization in this ever changing world.