Poly MDA524 QD USB-C Audio Switch – 85Q24AA

Product Overview

The Poly MDA524 QD (85Q24AA) is a smart audio processor that seamlessly integrates mixed call environments for contact center and office professionals. Connect your Poly 4-pin QD headset to both desk phone and PC softphone, then switch between audio sources with intuitive button controls.

Independent volume and mute controls for each audio channel let you manage calls with precision. Advanced noise and echo cancellation ensures crystal-clear communication, while USB-C connectivity provides reliable integration with modern computers and UC applications from Microsoft, Cisco, and Avaya.

Who Should Use This Product?

Contact Center Agents

CSRs who handle calls from both desk phones and softphones need seamless switching and independent audio controls to serve customers efficiently.

Office Professionals

Workers transitioning to unified communications who want to use their existing QD headset with both traditional desk phones and PC-based calling.

Why Choose This Product

The Poly MDA524 QD simplifies mixed call environments by letting agents use one headset for all their communication needs. Independent volume and mute controls for each audio channel ensure precise call management, while advanced noise and echo cancellation delivers professional audio quality that improves customer satisfaction.

Will This Work for Me?

Works With

  • Windows, macOS
  • Microsoft, Cisco, Avaya UC applications and softphones
  • Poly EncorePro 500/700 series with 4-pin QD connector
  • All major desk phones with headset port or handset connection

Requirements

  • USB-C port on computer
  • Poly 4-pin QD headset (sold separately)
  • EHS cable for remote answer (sold separately)

Software

  • Poly Lens Desktop App (optional, for firmware updates and audio mixing features)

Note

This is the USB-C variant. For USB-A connection, see MDA524 QD USB-A (8L544AA). For 6-pin digital QD headsets, see MDA526 QD.

What's in the Box

  • MDA524 QD audio processor
  • 4-pin Quick Disconnect cable
  • Telephone interface cable (86007-01)
  • USB-C cable
  • Quick start guide

Technical Specifications

MDA Series Models (4)

View Poly MDA100 QD Audio Switch | 10ft Cable – 8A7E1AA
Poly MDA100 QD Analog to USB Desk Phone Switch with Mute (10 ft Cable) - 8A7E1AA
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MDA100 QD

SKU: 8A7E1AA
Condition: New
Stock: 113
$58.32
$102.95
Save $44.63
(43% off)
View Poly MDA105 QD Audio Switch – 8A7E2AA
Poly MDA105 QD Analog Desk Phone to Softphone Switch with Mute - 8A7E2AA
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MDA105 QD

SKU: 8A7E2AA
Condition: New
Stock: 92
$67.38
$118.95
Save $51.57
(43% off)
View Poly MDA524 QD USB-A Audio Switch – 8L544AA
Poly MDA524 USB-A QD Desk Phone and UC Softphone Switch with Call Controls - 8L544AA
Poly logo

MDA524 QD

SKU: 8L544AA
Condition: New
Out of Stock
$96.28
$169.95
Save $73.67
(43% off)
View Poly MDA220 USB-A Audio Switch – 8A7E0AA
Poly MDA220 USB-A Dual-Device USB Headset Switch - 8A7E0AA
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MDA220

SKU: 8A7E0AA
Condition: New
Stock: 250+
$111.01
$195.95
Save $84.94
(43% off)