Hi, We have successfully installed our 3X PBX and is able to make incoming and outgoing calls using the X-Lite softphone. However, when we created an extension using a Linksys SPA-2002 ATA, we are able to make outgoing calls, the other party can hear us but we can't hear them. We have swapped phone units but with the same result. We have pulled out and put back the ATA's power cable but no success. Any insight that you guys can give is truly appreciated.