Hello everyone, I am wondering if anyone can help me with a problem I am currently having. I recently switched two M7310 phones out with T7316e phones. I was able to set-up each phone easily, but we are having issues with our headsets. We have 3 HW251N headsets from Plantronics with A10-16 cords, and we can hear people on the other end, but they can't hear us. It is as if they are muted. I have a T7316e in my office and the headset works fine. I have gone through all of the programming and made sure that the Handsfree option is set to Auto, but I am stumped as to why they do not work still. The only difference that I can see between my phone and the others are the placement of the features such as: paging, call park and call pick-up. I tried calling the manufacturer, but they do not help unless you buy a maintenance contract. I called the company who installed the phones, but they are stumped as well. I am hoping that someone has experienced this problem and can lend a hand. Thank you for your help in advance.