Your contact centre agents are your brand ambassadors, so give them the tool to sound as clear as your brand. In Jabra’s Biz™ 2300, world-class sound meets world-class durability in an exceptionally comfortable and stylish corded headset – keeping both your agents and your customers happy.Jabra Biz™ 2300 QD Siemens Duo is a balanced duo headset designed for Siemens OpenStage telephones. Provides instant connectivity to a wide range of deskphone systems with its QD (Quick Disconnect) plug. Jabra Biz™ 2300 QD Siemens Duo is a balanced duo headset designed for Siemens OpenStage telephones. Provides instant connectivity to a wide range of deskphone systems with its QD (Quick Disconnect) plug.