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38439-01 - APP-50 EHS Cable (Polycom)

EHS Cable APP-51 (Polycom)


In stock

Plantronics APP-51 EHS Cable:

• Typically used on Polycom 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

9 Item(s)

per page
  1. Great buy, works excellent Review by KM

    Very happy with my purchase. Easy to use and works great. I highly recommend this.

  2. cable at Y slightly too short Review by slight problem

    Everything about this cable was great, except the VVX201 model phone I have has the headset jack and phone jack are not in the same place and the cables that form the Y were too short to make the connection. An inch longer on either one would have done it. We had to buy another cable to make it reach. I think the VVX201 is the only polycom model that has the headphone jack not in line with the other connections on the base of the phone, so this is probably isolated to just that model. We called plantronics and even the person on the help desk was surprised by that. With the adapter, everything is great.

  3. Love it. Review by Marty

    These cables really helped our Receptionists so the headset button automatically opens the line. It really saved them some steps in answering calls.

  4. Product works for purpose indicated Review by John

    I purchased wrong item, and Headsets Direct helped me get it straightened out. Allowed the return of wrong item and replaced with the correct one. All done very quickly, efficiently and at no expense.

    I am pleased with their knowledge and service.


  5. Much Needed Review by Audie

    Our office staff is so happy we purchased this cable. We can easily answer our phones if we are away from our desk, and it made our jobs much easier.

  6. Great product!!!! Review by Fred

    Works great in connecting my Platronics headset to my new Polycom phone.

  7. Works as intended Review by ThatChr1s

    Very simple review because it works just like it says it should. Very easy to install between the headset and the Polycom phone.

    No issues. Just a great product.

  8. have to have it! Review by Pam

    To answer and hang up without being at your phone, this is a must have.

  9. Works Like a Charm Review by Edie

    This Electronic Hook Switch eliminates the need for a clunky handset lifter. It provides a professional capability to a small business for a very affordable price. I would highly recommend this to give any small business a big business feel!

9 Item(s)

per page
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38439-11 - APP-51 EHS Electronic Hook Switch Cable for Polycom:

Electronic Hook Switches (EHS) communicate electronically with your phone giving your wireless headset answer/end and ring alerts remotely.  The use of an EHS cable eliminates the need for an HL10 handset lifter. (Formerly 38439-01 - APP-50)

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

*** See pictures for installation ***

TECH TIP: EHS Compatibility/Installation Guide

1-Year Warranty     1-Year Warranty     


Compatible with: CS500 Series (CS510, CS520, CS530, CS540), Savi Office (WO100, WO200, WO300, WO350), Savi 700 Series (W710, W720, W730, W730M, W740, W740M, W745)

(Click here for APP-5 - Compatible with CS70N, CS70, CS50, CS55, Voyager 510S, CS351, CS351N, CS361, CS361N)

Plantronics Savi-Series settings: 2/A/3

TECH TIP: EHS Compatibility/Installation Guide

Compatible with: Polycom IP320/321, IP330/331, IP335, IP430, IP450, IP550, IP560, IP650, IP670, VVX Series

Note 1: Phone must be running SIP application 3.1 or higher and BootROM 4.1.0 or later.
Note 2: Phone must be running SIP application 3.0.2 or higher and BootROM 4.1.0 or later.
Note 3: Phone must be running SIP application 3.1.0 Rev C or higher and BootROM 4.1.0 or later.
Note 4: Phone must be running SIP application 3.1.2 Rev B or higher and BootROM 4.1.0 or later.
Note 5: Depending on which CS-series of headsets you have:

For newer CS-series (CS510, CS520, CS540) wireless headsets:
If the Polycom phone does not have an RJ9 jack. (ie. IP320/321 & IP330/331)
The 2.5mm headset port connector requires Polycom adapter 2200-11095-002

For older CS-series (CS50, CS55, CS70N, CS351N, CS361N, CS510S) wilreless headsets:
CS Models can alternatively use Plantronics adapter 78333-01
When using 78333-01 bypass the EHS cable audio connection.
Connect 78333-01 directly between CS base and phone headset connector

Note 6: "Specify whether or not the electronic hookswitch is enabled and what type of headset (attribute up.analogHeadsetOption set to 2) " is attached by changing the phone1.cfg in the boot server. If this is not setup the call will hang up in 30 seconds



Special Headset Programming for Polycom Phones:

Most Polycom phones will need the headset port activated for EHS use, giving you remote answer/hangup capabilities.

1) Make sure the EHS cable is NOT plugged into your Polycom phone
2) From your phone select: Menu-> Settings-> Basic-> Preferences->Headset-> Analog Headset Mode or Electronic Hook Switch Mode
3) Scroll Down to Plantronics Mode, and then press Select. - Press Menu to return to the idle display
4) Now that the port is activated, you may plug the EHS cable into your phone and headset base.
If your phone has different options, your firmware may have been modified/updated.  This is common with some cloud hosting companies.  Consult your phones manual or contact your phones IT department for assistance.
Additional Information
Inventory at start of day 17
Compatibility No
Talk Time -
Stand By Time -
Roam Distance -
Headset Style No
Headset Weight -
Part # 38439-11 (Formerly 38439-01 - APP-50) Also called APP 51 and APP51
Brand Plantronics
UPC 017229137363
Helpful Links -
MSRP $79.95

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