Stop lifting that handset. The HP Poly APN-91 Electronic Hookswitch (85Q59AA) gives you instant remote control over your NEC desk phone using any compatible Poly wireless headset. Answer calls, end calls, and hear ring alerts – all without ever touching the phone. It’s the simple upgrade that makes every call smoother for busy professionals who rely on NEC phones and Poly headsets every day. Key Features Remote call control at your fingertips – Answer and end calls directly from your Poly headset; no more handset juggling, so you stay focused and move freely around the office. Instant ring alerts in your ear – Hear calls coming in even when you’re away from your desk – never miss an important call again. No HL10 handset lifter needed – Saves money, space, and setup time while giving a cleaner, more professional workspace. Built for NEC phones – Works with popular models including DT700/300 series, DT330, DT730, DT750, DSX, DTR, DTH, and DTL series (check exact firmware for best results). Seamless Poly headset compatibility – Pairs perfectly with CS500/CS500 XD, Savi 700 Office series, Voyager Legend CS, and MDA200 for full PC + desk phone control. TAA compliant – Meets strict government and enterprise procurement standards right out of the box. Five-minute install – Includes everything you need (even the plastic flap for secure network connection) and clear base-switch settings so you’re up and running fast. Technical Specifications Product — Poly APN-91 Electronic Hookswitch Cable HP SKU — 85Q59AA (also Poly 89280-11) Regulatory Model — APN-91 Compatibility — NEC DT700/300 (i-SIP/N-SIP versions), DT330, DT730, DT750, DSX 34B BL/FDX, DTR/DTH/DTL series Headset compatibility — Poly CS500/CS500 XD, Savi 700 Office, Voyager Legend CS + MDA200 Base settings — Listening volume: 3 | Configuration switch: A | Speaking volume: 2 Special notes — DT700/300 requires microphone cable connection to EHS cable and placement on phone speaker Compliance — TAA compliant Poly SKU: 89280-11 HP SKU: 85Q59AA