Review on LotFancy Calltel Call Center Headset for Avaya 1600/9600 - IP Phone Headset with Mic: Compatible with 1608, 1616, 9620, 9630, 9640, 9640G, 9650, 9670 by Kim Sanchez

Ordered although I could hear people they couldn't hear me. I complained to the seller and he sent me a second one. The second failed too. At least the second time, when I scream, the other interlocutor hears me. This is of course unacceptable. When I decided to send them back I was told I would have to send them back for a refund. This increases the return code almost to the value of the product. Bottom line: doesn't work, not worth getting my money back. This is a prohibited item.