I have installed a soft phone on an office PC. It detects the call processor fine and pulls its extension information without any trouble. I have a microphone and earphones plugged into the PC. When i try to make a call, I get a dial tone in my earphones, dial the softphone, and hear it ring. When the party answers however, I can't hear anything and they can't hear me. The volume just drops out entirely. This occurs with calls to internal extensions as well as external parties.
Anyone have any experience with these softphones and what might be happening?