NEW - Plantronics DA 45 sound card 77559-11 7755911 DA45 USB Audio Processor USD-TO-QD - We Pay Shipping.
About this item

• Seamless Connectivity: The Plantronics DA45 USB-to-QD Adapter Audio Processor Cable provides a reliable and seamless connection between your Plantronics headset and your computer via USB, ensuring uninterrupted audio and communication.
• Enhanced Audio Quality: Experience crystal-clear sound and enhanced audio quality with this adapter cable, allowing for clear and precise communication during calls, video conferences, or multimedia playback.
• Versatile Compatibility: The DA45 adapter cable is compatible with a wide range of Plantronics headsets, making it a versatile solution for various headset models and ensuring compatibility with your existing equipment.
• Easy Setup and Use: With its plug-and-play functionality, the DA45 adapter cable is easy to set up and use. Simply connect the cable between your headset and computer, and you're ready to go, without the need for additional software or drivers.
• Lightweight and Compact Design: The compact and lightweight design of the DA45 adapter cable makes it portable and easy to carry, allowing you to conveniently use your Plantronics headset with any computer, whether at home, in the office, or on the go.

Purpose of the Plantronics DA45 USB Audio Processor (77559-11 / 7755911)The Plantronics DA45 (often called a "sound card" in listings) is a USB-to-Quick Disconnect (QD) audio adapter designed to connect professional Plantronics H-series QD headsets to a computer via USB for VoIP softphone calls (e.g., Microsoft Teams, Zoom, RingCentral, Cisco Jabber).Primary Purpose:

• Enable hands-free, high-quality audio for office workers, call center agents, or remote professionals using wired QD headsets with PC-based phone systems.
• Replace the need for a desk phone or built-in laptop audio by providing superior call clarity, inline controls, and quick headset swapping.

How It Works (Step-by-Step)ComponentFunction1. USB-A PlugConnects to your PC or laptop USB port. The DA45 appears as a USB audio device (no drivers needed on Windows 10/11, macOS).2. Internal DAC/ADCConverts digital USB audio analog headset audio. Supports wideband audio (up to 16 kHz) for clearer, more natural voice vs. narrowband (phone-like) audio.3. Inline Control ModuleContains physical buttons: - Call Answer/End - Volume Up/Down - Mute (with LED indicator)4. Quick Disconnect (QD) PortAccepts Plantronics H-series QD headsets (e.g., HW251, H261N). The QD lets you unplug the headset without dropping the call (ideal for walking to a printer or switching users).5. Echo Cancellation & Noise ReductionBuilt-in DSP (digital signal processor) reduces echo and background noise for professional-grade call quality.Workflow Example

1. Plug USB into computer → Windows/macOS auto-detects "Plantronics DA45" as the default audio device.
2. Connect H-series headset to QD port.
3. Open softphone app (e.g., Teams) → Select "Plantronics DA45" as microphone/speaker.
4. Receive call → Press inline Answer button → Talk hands-free.
5. Need to step away? → Unplug QD → Call stays active on PC → Plug back in to resume.

Key AdvantagesFeatureBenefitWideband AudioCrystal-clear voice (like in-person), reduces "Can you repeat?"Inline ControlsNo need to touch keyboard/mouse during callsQuick DisconnectSwap headsets or users instantlyPlug-and-PlayNo software install (works with Windows, macOS, most UC platforms)