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Poly MDA526 QD Digital Audio Processor



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Plantronics MDA526 QD Switch Features:

  • One headset for desk phone & softphone / VoIP
  • Easily transition into Unified Communications
  • Only compatible with HW Digital Series headsets*
  • USB-A or USB-C options
  • Independent volume and mute and call answer/end controls
  • Quick-Disconnect lets you unplug and walk away

Tech Tip: This product uses 6-pin quick disconnect and is not compatible with 4-pin headsets and training cables.


*Compatible with: HW510D, HW520D, HW530D, HW540D, HW710D, HW720D

  • Same Day Shipping On In Stock Items
  • Warranty 2-Years
  • 30-Day Returns
  • Latest Date Codes

Poly MDA526 QD Digital Benefits:

  • One headset for desk phone and PC calls or applications
  • Manage your audio from one simple-to-use device
  • Easy-to-use buttons
  • Visually see your microphone mute button and call status indicators
  • Independent volume and mute and call answer/end controls
  • Superior noise and echo cancellation
  • 6-Pin Quick-Disconnect Cord allows you to walk away from your desk
  • Compatible with any Plantronics H-Series Digital headset
  • Desk phone compatibility with electronic hook switch (EHS) integration
  • USB-A or USB-C cable
  • 2 Year Warranty
  • Part # MDA526 QD-A (USB-A) | MDA526 QD-C (USB-C)
  • SKU # 212166-01 (USB-A) | 212176-01 (USB-C)
  • UPC: 017229164246 (USB-A) | 017229164260 (USB-C)


  • FREE technical support with purchase
  • Need help?  Call us and talk to a Real Person

What comes in the box:

  • MDA 526 QD Digital Audio Processor
  • 6-Pin Quick Disconnect cable
  • Telephone Interface cable (86007-01)
  • USB-A or USB-C Cable
  • Quick start guide

MDA526 Compatibility Settings:

Compatibility Slide Switch: The bottom of the MDA526 QD has a slide switch with letters A-F.   Research your phone’s natural Direct Connect Cable for correct compatibility setting.

A = U10
B = A-10
C = U10P
E = U10P-S

Additional information




Computer USB-A, Computer USB-C, Desk Phone

USB Connection Type


Part #

212166-01 (USB-A), 212176-01 (USB-C)


017229164246 (USB-A), 017229164260 (USB-C)


Same Day Shipping On In Stock Items


30-Day Returns




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