Poly APA-24 EHS Cable



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Poly APA-24 EHS Cable (Alcatel-Lucent) (Poly 212539-01 or HP 85Q52AA)

  • Typically used on Alcatel-Lucent phones (EHS Guide)
  • Compatible with CS500 / Savi / Voyager series wireless headsets
  • Allows for remote answer/hang-up
  • Receive call alerts when away from your desk
  • Automates taking of calls
  • See picture for setup/installation
  • Same Day Shipping On In Stock Items
  • Warranty 1-Year
  • Non-Returnable

Poly APA-24 EHS Cable (Alcatel-Lucent) – Poly 212539-01 or HP 85Q52AA

The Poly (formerly Plantronics) APA-24 Electronic Hook Switch (EHS) cable part # Poly 212539-01 or HP 85Q52AA communicates electronically with your desk phone giving your wireless headset call control. The APA-24 EHS allows ring alerts to sound in your headset as well as answer and end calls remotely.

This cable eliminates the need for a HL10 handset lifter. This cable works with Alcatel-Lucent desk phones and may work with additional manufacturers.


Poly has several EHS adapters, each being unique to a specific telephone and wireless product.
We strongly suggest confirming compatibility with us before purchasing.

TECH TIP: APA-24 EHS Compatibility/Installation Guide

APA-24 Installation

Poly APA-24 Compatibility:

Headset Compatibility

  • CS500 Series
    • Current: CS540, and all -XD variants
    • Discontinued: CS510, CS520, CS530
  • Savi Series
    • Current: 7210, 7220, 7310, 7320, 8210, 8220, 8240, 8245 and all -M variants
    • Discontinued: W710, W720, W730, W730, W740, W745 an all -M variants
  • Voyager Series
    • Office Series: 4210, 4220, 4245, 5200, and all -M variants
    • USB: When used with Voyager Office Base and all -M variants

Alcatel-Lucent Phone Compatibility

  • 4028, 4028EE, 4029
  • 4038, 4038EE, 4039
  • 4068, 4068EE
  • 8012*, Omni Touch 8012
  • 8028, 8029, 8038, 8039
  • 8068 BT
  • 8082, Omni Touch 8082

Poly APA-24 Notes: 

*Used headset port. Call control only no ring alert

Headset has to be enabled in the phone by going to Settings>set>plug into jack>headset on the phone. The headset checkbox on the main screen has to be unchecked

Phone then automatically detects headset when the cable is plugged into the 3.5mm receptacle and the screen shows the headset ICON

Note 1 = Phone and headset can go out of sync – answering headset will hang-up phone. User must answer and end from headset.
Note 2 = Special unit required – has bi-directional communications

Poly APA-24 EHS Specifications:

  • Model: APA-24
    • Formerly APA-20, APA-22, APA-23
  • Poly SKU: 212539-01
    • Formerly 37819-01, 38908-11
    • UPC: 0017229137332
  • HP SKU: 85Q52AA
    • UPC: 197497572285
  • Warranty: 1 year

** Replacement Note: The APA-24 EHS cable replaces the APA-23 cable and features compatibility with the Poly On-line Indicator accessory

Additional information for the Poly APA-24 EHS Cable


Same Day Shipping On In Stock Items








212539-01 (Poly), 85Q52AA (HP)


0017229137332 (Poly), 197497572285 (HP)


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