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Small black rectangular adapter with USB-A plug and Quick Disconnect jack

HP

HP Poly MDA105 QD USB-A Analog Switch

SKU CH-DPQZ-CA5AD

Analog switch lets one headset handle desk-phone and softphone audio with single volume control

  • Manage calls from two sources with one headset
  • Single volume control simplifies daily operation
  • Quick-disconnect USB-A fits existing headsets
  • Designed for contact-centre softphone transitions
  • HP Poly MDA105 QD analog switch model 105

Single-headset call switching

The HP Poly MDA105 QD USB-A Analog Switch lets contact-centre agents manage audio from two sources — a desk phone and a softphone — with one Quick-Disconnect headset and a shared volume control. It is built for teams migrating to unified communications who still need legacy phone support.

Replaces dual-headset setups

The switch removes the need for separate headsets per device, cutting desk clutter and hardware cost during a phased UC rollout. The jump is worth it when agents must answer calls on both systems throughout the day without swapping gear.

Handles dual-source audio routing

The analog switch comfortably routes mono or stereo signals from either source to the connected QD headset. It runs out when a third audio device or digital USB audio path is required, as only two analog inputs are provided.

How it compares

Measured against everything we stock in Wired & Wireless Headsets, at today’s prices. Recalculated every night.

Price $65.99
Typical for this category: the median of 1,586 items is $60.99.

Specifications

Product
Brand nameHP

Questions about this item

Does the MDA105 switch connect to a headset with a Quick Disconnect plug?

Yes, the MDA105 has a Quick Disconnect port for the headset and a USB-A connector for the computer, letting one headset handle both desk-phone and softphone audio.

Which setting do I choose on the MDA105 when I first plug it into my PC?

Set the switch to the USB position so the computer recognises the device, then move it to the desk-phone position only when you need to take a call from the handset.

What part should I keep spare if the MDA105 cable frays near the USB plug?

The whole MDA105 switch is a single unit; there is no detachable cable, so a spare switch is the only replacement option if the lead is damaged.

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