Poly APU-72 EHS Cable

(1 customer review)


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Poly APU-72 EHS Cable (Cisco/Nortel) (Poly 202578-01 or HP 85Q95AA)

  • Typically used on Cisco & Nortel phones (EHS Guide)
  • Compatible with CS500 & W700 series wireless headsets
  • Allows for remote answer/hang-up
  • Receive call alerts when away from your desk
  • Automates taking of calls
  • Same Day Shipping On In Stock Items
  • Warranty 1-Year
  • Non-Returnable

Poly APU-72 EHS Cable (Cisco/Nortel) – Poly 202578-01 or HP 85Q95AA

The Poly (formerly Plantronics) APU-72 Electronic Hook Switch (EHS) cable part # Poly 202578-01 or HP 85Q95AA communicates electronically with your phone giving your wireless headset answer/end and ring alerts remotely.

The APU-72 cable eliminates the need for an HL10 handset lifter.

Poly APU-72 EHS

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: APU-72 EHS Compatibility/Installation Guide

APU-72 Set up diagram

 Poly APU-72 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, W740, W745, and all -M variants
  • Voyager Series
    • Office: 4210, 4220, 4245, 5200, and all-M variants
    • USB: When used with Voyager Office Base and all -M Variants

(APU-7 – Compatible with: CS70N, CS70, CS50, CS55, Voyager 510S, CS351, CS351N, CS361, CS361N)

Cisco Phone with APU-72 EHS Compatibility

  • 8861
  • 9951, and 9971
  • DX650

Nortel Phone with APU-72 EHS Compatibility

  • 1120E
  • 1140E
  • 1150E
  • 1165E

Cisco Electronic Hookswitch Setup:

Software Requirements:

The Cisco server must be running Cisco CallManager System Version 4.1(3)SR5x or higher.
Verify by logging onto the Callmanager with a browser. Press the detail button on the main page to display the SW version.
The Cisco phone must be running firmware 8.3(3)x or higher.
Press the settings button on the phone (Checkbox icon). Select “Model information”. The firmware revision is listed under “Load File”

Phone verification

The phone must be set for “Wireless Headset Hookswitch Control” = Enabled
Press the settings button on the phone (Checkbox Icon). Select “Device Configuration” >> Select “Media Configuration”
If “Wireless Headset Hookswitch Control” is ” Disabled”, follow the instructions below.

Enabling Wireless Headset Hookswitch Control

Access the server administrator with a browser. Select Device>Phone through the drop down menus.
Click “Find” with no selection criteria to obtain a list of all phones
Open the desired phone. Scroll down to “Wireless Headset Hookswitch Control” Set to “Enabled”
Click “Apply”. Wait for the dialog box to appear, then reset the phone by clicking the reset button.

Expansion Modules

If the phone is equipped with a model 7914/7915/7916 expansion module:
The Expansion module will be plugged into the telephone AUX connector
Connect the APC-4 (APC-40) control connection into the expansion module
Use a 40287-05 adapter to extend the APC-4 (APC-40) audio input to reach the headset jack on the phone

Nortel Firmware Notes

The latest Nortel firmware 3.1 has enabled USB support on Nortel 1120E and USB and Bluetooth support for 1140E and 1150E.
The firmware revision needs to be at least rev 0624C6J (1120E), 0625C6J (1140E), 0627C6J (1150E) and up.
**REV 9 The USB port has to be enabled on the phone by pressing the services button on the phone twice -> select preferences -> Select headsets -> change headset type to USB -> press Apply softkey

How To Check The Firmware Version

1)      Press the Services button once.
2)      Choose ‘Telephone Options’
3)      Choose ‘Set Info’
4)      Choose ‘General Info’
5)      Scroll down and note FW Version

Poly APU-72 Specifications

  • Model APU-72 EHS Cable
    • Formerly APU-70 / APU-71
  • Poly SKU: 202578-01
    • Formerly 83018-01 / 83018-11
    • UPC: 0017229146938
  • HP SKU: 85Q95AA
    • UPC: 197497572773
  • Warranty: 1 year

Additional information for the Poly APU-72 EHS Cable




Same Day Shipping On In Stock Items








202578-01 (Poly), 85Q95AA (HP)


0017229146938 (Poly), 197497572773 (HP)

1 review for Poly APU-72 EHS Cable | Poly 202578-01 or HP 85Q95AA

  1. DeeDizzle

    Used the cable to connect to a Cisco 8961 phone and it works perfectly. Provides ability to answer and hang up from calls without having to be next to the physical phone.

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