Plantronics - Electronic Hook Switch Cable APP-51 (Poly) - Remote Desk Phone Call Control - Works with Poly Desk Phones

Works perfectly, thanks!

Great for using a wireless headset with your Poly desk phone. Easy setup, works well. Worth the price for convenience.

as advertised. good quality.

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.

We've been using Polycom phones with Plantronics wireless headsets - and the combination works great except for the fact that the answer button on the headset doesn't work without using a handset lifter.To me, handset lifters have always seemed a bit kludgy; but, this cable completely solves the issue without needing a lifter. All you need to do is replace the default Plantronics-to-phone interface cable with this one and everything works perfectly.I will say that I originally just plugged the cable in and was disappointed when it didn't work as expected. After a few minutes of trial-and-error I ended up pulling the one-page instruction sheet that came with this cable out of the trash and actually read it :). The key was to adjust the settings on the phone to Analog/Plantronics Mode, and then everything worked perfectly.I know it seems expensive; but, when compared to the cost & hassle of a lifter, this cable really isn't a bad deal. I would recommend it if you're using a Plantronics headset with a Polycom phone.

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.

I ordered this for my employer to use on a Plantronics CS530 headset with a VVX 500 IP Phone. Upon arrival of the package, I attempted to install this in conjunction with the 2 products above. On initial installation, All I received was "snow" from the phone, I went through all troubleshooting steps and contacted Plantronics Support and followed their troubleshooting instructions. I was informed that the cable was bad and to return it. At $55 + per cable, I would expect that the device would work as advertised and intended.I did contact Plantronics and verified this is the cable for use for both the headset and the IP Phone, despite their website displaying incorrect information.It was sold by Excellent Products Inc.***Buyer Beware****

When we upgraded the phones at work, we didn't upgrade the wireless headsets as they were still in great condtion and worked perfectly. This cord saved us from having to buy new headsets. Works great with Poly VVX450 phones.