• Home
  • HP Poly APP-51 Electronic Hook Switch Cable (85Q60AA, 38439-11) | New
HP Poly APP-51 Electronic Hook Switch Cable (85Q60AA, 38439-11) | New

HP Poly APP-51 Electronic Hook Switch Cable (85Q60AA, 38439-11) | New

SKU: 85Q60AA-N
(0)No Reviews yet

Same Day Shipping - Arrives in 3-5 Business Days
30-day Returns

In Stock

$49.99 $49.99
Free Ground Shipping
For immediate assistance call our support team at 973-808-4588. For additional information, send an email to website@telquestintl.com.

Overview

Overview of HP Poly APP-51 Electronic Hook Switch Cable (85Q60AA) | New

The HP Poly APP-51 Electronic Hook Switch Cable (85Q60AA) was designed EHS system that allows for complete remote call control by connecting suitable Poly wireless headsets to specific desk phones. This electronic hook switch cable offers a clear, dependable interface so customers can answer, end and switch calls straight from their headset buttons rather than depending on a mechanical handset lifter. Employees can roam freely throughout the workplace while still having complete control over incoming and active calls on their desk phone, resulting in a more seamless UC experience. The HP Poly APP-51 EHS cable removes the clutter and possible sources of failure associated with mechanical lifters, making it ideal for professional office, contact center and hybrid work environments. It transmits signaling that electrically mimics going off-hook and on-hook between the base of a compatible Poly/HP wireless headset system and compatible desk phone models. This implies that there is no need to physically lift the handset when a user hits the call button on the headset because the phone goes off-hook and the call is answered. In order to provide dependable interoperability and maintain crucial call features like ring indicator and remote answer, the APP-51 is tuned for particular phone families, often including supported Avaya/Alcatel and comparable systems. This connection is an inexpensive addition that greatly improves the user experience for companies that are standardizing on wireless headsets for their desk phone fleet.


Key Features of HP Poly APP-51 Electronic Hook Switch Cable


Electronic hook switch integration between Poly wireless headset bases and supported desk phones, enabling remote answer/end without a mechanical lifter.

Direct remote call control from the headset—answer, end, and sometimes toggle calls using headset buttons for a more natural workflow.

Clean, compact cabling that connects discreetly from the headset base to the phone’s EHS/auxiliary port, reducing desktop clutter compared with physical lifters.

Optimized compatibility profile for specific IP or digital phone families (often including common enterprise brands), ensuring consistent signaling behavior.

No moving parts, making it quieter, more reliable, and less prone to mechanical wear than handset lifters.

Simple plug-and-play setup, typically requiring only a quick configuration on the phone and headset base to enable EHS functionality.


Benefits of HP Poly APP-51 Electronic Hook Switch Cable


🗹 Hands-free freedom with full control where staff can walk away from their desk and still answer or end calls from the headset, boosting responsiveness and reducing missed calls.

🗹 Improved ergonomics and user comfort eliminates the need to reach for the handset each time, supporting healthier posture and smoother workflows for heavy phone users.

🗹 Quieter, more professional environment that electronic signaling avoids the audible “clack” of a mechanical lifter, which can be distracting in quiet offices and contact centers.

🗹 Reduced maintenance and downtime with no mechanical lifting mechanism to adjust or replace, the EHS cable offers long-term reliability and fewer support tickets.

🗹 Higher ROI on wireless headsets unlocks the full capabilities of Poly wireless solutions, ensuring organizations get maximum value from their headset investment.

Specifications

Specifications for HP Poly APP-51 Electronic Hook Switch Cable (85Q60AA) | New

ManufacturerPoly
Manufacturer Part Number85Q60AA, 38439-11
Product NameHP Poly APP-51 Electronic Hook Switch Cable
Product TypeEHS Adapter
FunctionProvides remote desk phone call control (answer/end) from compatible wireless headsets
Device supportedDesk phone + wireless headset (phone cable accessory)
ColorBlack
Cable typeProprietary EHS interface cable (phone-side plug + headset-base plug)
Main useElectronic off-hook/on-hook signaling; eliminates need for mechanical HL10 handset lifter
Headset compatibilityPoly CS500 Series (e.g., CS540, CS510, CS520, CS530 and -XD variants); Poly Savi Series (710/720/730/740/745 and newer 7210, 7220, 7310, 7320, 8210, 8220, 8240, 8245 incl. -M variants); Poly Voyager Office Series (4210, 4220, 4245, 5200 when used with Voyager office base); some MDA series bases.​
Phone compatibilityPoly/Polycom IP desk phones including IP320/321, IP330/331, IP335, IP430, IP450, IP550, IP560, IP650, IP670, VVX Series, CCX Series (and others as listed in vendor compatibility guides).​
Signaling featuresRemote answer/end, ring alert in headset, electronic hookswitch control
Replacement infoReplaces APS-50 EHS cable; compatible with Poly/Plantronics on-line indicator accessory
TAA statusTAA-compliant variant for government/regulated procurement

Frequently Asked Questions

HP Poly APP-51 Electronic Hook Switch Cable
Frequently Asked Questions (FAQ's)



What does an EHS cable do?

  • It enables electronic call control so you can answer/end desk-phone calls from your wireless headset controls.
  • What problem does APP-51 solve vs. a handset lifter?

  • It removes the need for a mechanical lifter (like HL10), reducing moving parts and desk clutter.
  • Is APP-51 the same as APS-50?

  • APP-51 replaces APS-50 and is commonly listed as the newer replacement option.
  • Which desk phones is it intended for?

  • It’s built for Poly desk phones and is often validated across Poly/Polycom lines.
  • Will it work with non-Poly desk phones?

  • Some sellers note it may work with other manufacturers, but compatibility should be verified before purchase.
  • Which headset families commonly use APP-51?

  • It’s commonly paired with Poly/Plantronics CS500 and Savi series environments.
  • Does it let me answer calls when I’m away from the desk?

  • Yes—remote answer/end is the core purpose of the cable.
  • Does it support ring alerts in the headset?

  • Many EHS setups provide call alerting through the headset system; exact behavior can depend on your phone/headset pairing.
  • What is the “Online Indicator” and why does it matter?

  • It’s an accessory that signals on-call status; APP-51 is listed as compatible, which helps reduce interruptions.
  • Is this the same as Poly part number 38439-11?

  • APP-51 is commonly cross-referenced as 38439-11 / 85Q60AA by resellers.
  • Do I need software to use APP-51?

  • Usually it’s a hardware integration; however, some phone/headset setups may require phone-side settings or configuration for EHS behavior.
  • Is installation difficult?

  • Most deployments are straightforward: connect the cable between the desk phone/headset base per the EHS port guidance, then confirm call-control operation.
  • Can I keep my handset connected too?

  • Often yes, depending on your phone model and how the headset base is integrated; many offices keep the handset available as a backup.
  • Does it improve audio quality?

  • It doesn’t change codec/audio processing—its value is call control (answer/end) and eliminating the lifter.
  • Is APP-51 TAA compliant?

  • HP lists the product as “Electronic Hookswitch TAA” under the 85Q60AA designation.
  • Is it compatible with specific Polycom phone series?

  • Many compatibility lists include common Polycom lines (e.g., SoundPoint IP and VVX families), but confirm your exact model.
  • What’s included in the box?

  • Listings typically include the APP-51 cable and manufacturer warranty documentation.
  • What color is the cable?

  • It’s commonly listed as black.
  • What’s the best way to avoid ordering the wrong EHS cable?

  • Match three things: desk phone model, headset family (CS/Savi/etc.), and the required EHS cable type (APP-51 vs other variants).
  • When should I choose APP-51 over other Poly EHS cables?

  • Choose APP-51 when your deployment is centered on Poly desk phones and the headset ecosystem it’s commonly paired with; for other PBX/phone brands, a different Poly EHS cable model may be required.
  • Ratings & Reviews

    No reviews available

    Be the first to Write a Review