Poly MDA524 QD USB-A Audio Switch – 8L544AA

Product Overview

The Poly MDA524 QD (8L544AA) is a smart audio processor that enables seamless switching between desk phone and PC softphone calls using a single 4-pin Quick Disconnect (QD) headset. Independent volume and mute controls for each audio channel allow for precise audio mixing, ensuring clear communication in mixed call environments.

Designed for contact center and enterprise environments, the MDA524 QD features advanced noise and echo cancellation, SoundGuard DIGITAL hearing protection, and visual mute/call status indicators. Connect to your PC via USB-A and integrate with Poly Lens or Plantronics Manager Pro for centralized device management and call analytics.

Who Should Use This Product?

Contact Center Agents

Ideal for CSRs who handle calls on both desk phones and PC softphones, enabling seamless switching without changing headsets.

IT Administrators

Centralized management via Plantronics Manager Pro enables cloud-based deployment, call analytics, and asset tracking across the organization.

Why Choose This Product

The Poly MDA524 QD simplifies mixed call environments by letting agents use a single headset for both desk phone and softphone calls. Independent volume and mute controls ensure optimal audio levels for each channel, while advanced noise cancellation keeps conversations clear. Visual indicators show mute status and call activity at a glance, reducing errors during customer interactions.

For IT teams, the MDA524 QD integrates with Plantronics Manager Pro for cloud-based device management, call quality analytics, and asset tracking. SoundGuard DIGITAL hearing protection and G616 anti-startle technology help organizations meet workplace safety requirements while maintaining agent comfort during extended shifts.

Will This Work for Me?

Works With

  • Windows, macOS
  • Microsoft Teams, Cisco, Avaya, and other UC platforms
  • Poly EncorePro 500/700 series with 4-pin QD connector

Requirements

  • USB-A port on PC
  • Desk phone with headset port or EHS cable (sold separately)

Software

  • Poly Lens or Plantronics Hub (optional, for firmware updates and audio mixing features)

Note

This model uses 4-pin QD connector. For 6-pin digital QD headsets, see MDA526 QD (8L547AA).

What's in the Box

  • MDA524 QD Audio Processor
  • 4-Pin Quick Disconnect cable
  • Telephone interface cable (86007-01)
  • USB-A 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
Poly logo

MDA100 QD

SKU: 8A7E1AA
Condition: New
Stock: 113
$58.32
$102.95
Save $44.63
(43% off)
View Poly MDA524 QD USB-C Audio Switch – 85Q24AA
MDA524 QD, USB-C, MDA QD Switch, For Use with All Major Desk Phones, UC Softphone Applications, includes Mute, Answer/End, +/- Volume, Asset Tracking with Plantronics Manager Pro
Poly logo

MDA524 QD

SKU: 85Q24AA
Condition: New
Stock: 21
$96.28
$169.95
Save $73.67
(43% off)
View Poly MDA105 QD Audio Switch – 8A7E2AA
Poly MDA105 QD Analog Desk Phone to Softphone Switch with Mute - 8A7E2AA
Poly logo

MDA105 QD

SKU: 8A7E2AA
Condition: New
Stock: 92
$67.38
$118.95
Save $51.57
(43% off)
View Poly MDA220 USB-A Audio Switch – 8A7E0AA
Poly MDA220 USB-A Dual-Device USB Headset Switch - 8A7E0AA
Poly logo

MDA220

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