Title: Beware of compatibility issues!
Review: This cord was supposed to allow my Mitel 5215 IP Phone to connect directly to my Plantronics headset but it did not do so. I checked prior to ordering it and it was listed as compatible but it didn't work correctly. If I unplugged the handset it would work in that port but not in the intended headset port. Luckily I was able to return it without a hassle and purchased the Vista M22 amplifier which did allow me to use my headset.
Is this product review negative?