QD-compatible EHS adapter: Enables seamless integration with QD headset base configurations
Remote call answer functionality: Allows users to answer calls remotely from their headset
Complements EHS circuit: Ensures proper operation of hands-free auto answer features
Genuine HP accessory: Guarantees compatibility and reliability with Poly headsets and phones
Summarized by Shop
The Poly EHS Electronic Hook Switch Adapter (85S12AA, part 85638-01) provides QD-compatible EHS functionality for Poly wireless headsets connected to phones via the QD adapter path — enabling remote call answer and end where a standard EHS cable alone does not complete the hook switch circuit. Verify compatibility with your specific heads