--- product_id: 1483083 title: "Plantronics - Electronic Hook Switch Cable APP-51 (Poly) - Remote Desk Phone Call Control - Works with Poly Desk Phones" brand: "poly" price: "£56.10" currency: GBP in_stock: true reviews_count: 13 category: "Poly" url: https://www.desertcart.co.uk/products/1483083-plantronics-electronic-hook-switch-cable-app-51-poly-remote-desk store_origin: GB region: Great Britain --- # Seamless headset integration Remote call control convenience Wired connectivity for zero lag Plantronics - Electronic Hook Switch Cable APP-51 (Poly) - Remote Desk Phone Call Control - Works with Poly Desk Phones **Brand:** poly **Price:** £56.10 **Availability:** ✅ In Stock ## Summary > 📞 Stay connected, hands-free, and ahead of the curve! ## Quick Answers - **What is this?** Plantronics - Electronic Hook Switch Cable APP-51 (Poly) - Remote Desk Phone Call Control - Works with Poly Desk Phones by poly - **How much does it cost?** £56.10 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.co.uk](https://www.desertcart.co.uk/products/1483083-plantronics-electronic-hook-switch-cable-app-51-poly-remote-desk) ## Best For - poly enthusiasts ## Why This Product - Trusted poly brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Eliminates Clutter:** No need for bulky handset lifters—streamlined desk setup. - • **Boosts Productivity:** Hands-free call control keeps you focused and efficient. - • **Trusted Reliability:** RoHS certified with a 1-year warranty for peace of mind. - • **Plug & Play Compatibility:** Works flawlessly with Poly desk phones and Plantronics wireless headsets. - • **Effortless Call Management:** Answer or end calls remotely without lifting the handset. ## Overview The Plantronics Electronic Hook Switch Cable APP-51 enables seamless remote call control for Poly desk phones and compatible Plantronics wireless headsets. Designed to replace traditional handset lifters, it offers plug-and-play convenience, enhancing productivity with hands-free call answering and ending. Compatible with a wide range of Polycom phone models, this wired solution is RoHS certified and backed by a 1-year warranty, making it a reliable accessory for modern professional workspaces. ## Description Electronic hook switch cable is designed for remote desk phone call control (answer/end). This cable eliminates the need for a HL10 handset lifter. Only compatible with Plantronics CS510, CS520, CS530, CS540, MDA200, Savi W710, Savi W720, Savi W730, Savi W740, Savi W745, WO100, WO101, WO200, WO201, WO300/50. Works With Following Polycom Phone Systems: SoundPoint IP 320, SoundPoint IP 321, SoundPoint IP 330, SoundPoint IP 331, SoundPoint IP 335, SoundPoint IP 430, SoundPoint IP 450, SoundPoint IP 550, SoundPoint IP 560, SoundPoint IP 650, SoundPoint IP 670, VVX 300, VVX 310, VVX 400, VVX 410, VVX 500, VVX 600, VVX 1500 Review: Works as Advertised - Great for using a wireless headset with your Poly desk phone. Easy setup, works well. Worth the price for convenience. Review: Headset Answer Button DOES Work - This adapter works perfectly and eliminates the need for the manual handset lifter. I can confirm that this works flawlessly with the Polycom VVX 400 series phones and contrary to a previous comment made stating that "answer button on the headset doesn't work without using a handset lifter", this is not the case for me. The headset answer button works as expected and it's easy to answer or initiate any call from either the headset button, picking up the handset, using the soft button on the phone or using the selection key on the Plantronics headset cradle. As others have stated, the price seems a little unjustified considering already investing $250+ for the Plantronics headset (which was more than the phone), but whatever, it works. ## Features - Ideal For: Electronic Hook Switch Cable for remote desk phone call control (answer/end) - Works With: This cable works with Poly desk phones and may work with additional manufacturers, check with our Product Configurator for more information - Telephone accessories - Type: hands-free kit ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B007IP8NNQ | | Best Sellers Rank | #12,575 in Electronics ( See Top 100 in Electronics ) #863 in Earbud & In-Ear Headphones | | Brand Name | POLY | | Cable Type | 1 | | Color | Black | | Compatible Devices | Plantronics CS510, CS520, CS530, CS540, MDA200, Savi W710, Savi W720, Savi W730, Savi W740, Savi W745, WO100, WO101, WO200, WO201, WO300/50 | | Compatible Phone Models | No Compatible Phone Models | | Connectivity Technology | Wired | | Connector Gender | Male-to-Male | | Connector Type | 1 | | Customer Package Type | Standard Packaging | | Customer Reviews | 4.4 4.4 out of 5 stars (844) | | Global Trade Identification Number | 00017229128644, 00017229137363 | | Included Components | EHS Cable APP-51 (Polycom) | | Indoor Outdoor Usage | Indoor | | Item Shape | Round | | Item Type Name | EHS Cable APP-51 (Polycom) | | Item Weight | 1 Grams | | Manufacturer | Poly | | Model | 38439-11 | | Model Name | EHS Cable APP-51 (Polycom) | | Number of Items | 1 | | Number of Pins | 2 | | Outer Material | Other | | Recommended Uses For Product | Remote desk phone call control with Plantronics wireless headsets and compatible phone systems | | Specification Met | RoHS | | UPC | 069060234015 163120258383 012302577364 641676238955 031112897158 803982738813 017229128644 168141407376 031112929095 069060015072 640206623940 680808318714 754262036634 163120276387 001910146413 168141623844 001910688708 601000740004 168141407369 956263120842 012302833668 745449849307 017229128651 172291373634 021111198516 777785707430 803982973863 956258625741 961613242365 601000740097 7253924301… | | Unit Count | 1 Count | | Warranty Description | 1 Year | ## Product Details - **Brand:** POLY - **Cable Type:** 1 - **Compatible Phone Models:** No Compatible Phone Models - **Connector Type:** 1 ## Images ![Plantronics - Electronic Hook Switch Cable APP-51 (Poly) - Remote Desk Phone Call Control - Works with Poly Desk Phones - Image 1](https://m.media-amazon.com/images/I/61tHChHPQrL.jpg) ![Plantronics - Electronic Hook Switch Cable APP-51 (Poly) - Remote Desk Phone Call Control - Works with Poly Desk Phones - Image 2](https://m.media-amazon.com/images/I/31oz2n9-rYL.jpg) ## Available Options This product comes in different **Size** options. ## Questions & Answers **Q: Has anyone had this cable go bad after a year or so? Issues like the call fading out where you can no longer hear the other person.** A: YES, I use Plantronics headsets and these cables at work and it is a common issue (globally) for some APP-51 adapters with the certain HW-Release like 02/16 A41.02 or 07/18. We get Echo-Issue, calls fading and dropping completely. The only solution to this that proved efficient is a different HW Release. **Q: Will this work with a polycom vvx201 phone?** A: It works on my polycom vx310 phone. **Q: Will this work with a vvx250?** A: Hello! Yes, it is compatible. If you have any further questions, feel free to contact our Customer Care Team at: 800-985-9815. **Q: Is this ( plantronics ehs 38439-11 ehs app-51 hook switch landline) is the correct adaptor for a plantronics cs530? i have a cisco 7975 phone. thanks** A: Thank you for your question. This cable is ONLY for POLYCOM phones. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Works as Advertised *by K***T on July 25, 2024* Great for using a wireless headset with your Poly desk phone. Easy setup, works well. Worth the price for convenience. ### ⭐⭐⭐⭐⭐ Headset Answer Button DOES Work *by B***Y on February 4, 2016* This adapter works perfectly and eliminates the need for the manual handset lifter. I can confirm that this works flawlessly with the Polycom VVX 400 series phones and contrary to a previous comment made stating that "answer button on the headset doesn't work without using a handset lifter", this is not the case for me. The headset answer button works as expected and it's easy to answer or initiate any call from either the headset button, picking up the handset, using the soft button on the phone or using the selection key on the Plantronics headset cradle. As others have stated, the price seems a little unjustified considering already investing $250+ for the Plantronics headset (which was more than the phone), but whatever, it works. ### ⭐⭐⭐⭐⭐ Works with Sangoma Phones *by A***R on December 21, 2023* I have several new models of Sangoma phones and multiple different Poly/ Plantronics headsets at my office. This cable allows users to push the button on the headset to answer and end calls. Works as intended which was a nice surprise as Sangoma phones are not currently on Poly/ Plantronics compatibility list. ## Frequently Bought Together - Plantronics - Electronic Hook Switch Cable APP-51 (Poly) - Remote Desk Phone Call Control - Works with Poly Desk Phones - Plantronics - CS540 Wireless DECT Headset (Poly) - Single Ear (Mono) Convertible (3 Wearing Styles) - Connects to Desk Phone - Noise Canceling Microphone - Poly (Plantronics + Polycom) CS540 Wireless Headset System --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.co.uk/products/1483083-plantronics-electronic-hook-switch-cable-app-51-poly-remote-desk](https://www.desertcart.co.uk/products/1483083-plantronics-electronic-hook-switch-cable-app-51-poly-remote-desk) --- *Product available on Desertcart Great Britain* *Store origin: GB* *Last updated: 2026-04-23*