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Small rectangular USB to QD adapter in black finish

HP

HP DA85-M USB to QD Adapter 786C8AA telephone accessory

SKU CH-WYSV-NGMVX MPN 786C8AA

Connects a Quick Disconnect headset to a USB port for computer telephony

  • Connects USB devices to QD headsets using the DA85-M adapter
  • HP branded accessory ensures compatibility with HP telephony equipment
  • Part number 786C8AA identifies the exact model for ordering
  • New condition guarantees unused, factory-fresh reliability
  • First listed by the manufacturer in 2026

HP DA85-M USB to QD Adapter

The HP DA85-M is a USB-to-QD adapter that lets you connect a quick-disconnect headset to a computer or desk phone with a USB port. It is designed for office workers, call-centre agents and remote teams who need a simple wired link between a professional headset and their communications device. Part number 786C8AA identifies this specific model from HP Poly.

Plug-and-play installation

The adapter installs without drivers on most operating systems; you simply insert the USB connector and attach the headset’s QD plug. Problems usually arise when the host device does not supply enough bus power or when the headset’s quick-disconnect wiring differs from the adapter’s pin-out, resulting in no audio or a muted microphone.

Check headset and port compatibility

Verify that your headset uses a standard quick-disconnect connector matching the DA85-M interface before ordering. Confirm the computer or phone has an available USB-A port and that its audio settings recognise the adapter as an input and output device. The product was first listed by the manufacturer on 13 March 2026.

Highlights

  • Connects USB devices to QD headsets using the DA85-M adapter
  • HP branded accessory ensures compatibility with HP telephony equipment
  • Part number 786C8AA identifies the exact model for ordering
  • New condition guarantees unused, factory-fresh reliability
  • First listed by the manufacturer in 2026

Specifications

BrandHP
ModelDA85-M
Part Number786C8AA
Shipping weight0.23 kg
Package size152 × 102 × 51 mm

Questions about this item

How can I confirm the HP DA85-M 786C8AA adapter is functioning correctly after connecting it?

Connect the adapter to a USB port, attach a compatible QD headset, and verify the headset is recognised in your computer's audio settings and communication software.

What is included with the HP DA85-M 786C8AA adapter and are any extra cables needed?

The package contains the DA85-M adapter unit; no additional cables are required as it connects directly to a USB port and accepts a standard QD headset plug.

Which version of the HP DA85-M USB to QD Adapter should I select for my setup?

The 786C8AA part number identifies the single DA85-M model offered; choose this version to connect a QD headset via USB.

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