I have multiple users in my environment who can make calls with the softphone feature of WebEx Connect and can hear the audio from the person they called, but the other person can't hear them. I am having this issue as well. I have tried a number of different settings including using the computer defaults from within WebEx-preferences as well as manually selecting which devices to use. I have gone into Control Panel and adjusted settings on the microphones and I can see the mixer indicating that it is detecting audio through the mic. I have also used the mic successfully in other applications. But, no matter what I do, the audio will not go through the call. Any help would be greatly appreciated.
Sounds like there is an issue with setting on UCM side. You can open a ticket with Connect TAC, so they can look into the configuration.