one-way voice issues

[tompoe]

I am using xlite 2.0 on FC5 linux. I have solid test call success. Called, 44-800-699-996 and talked with someone with british accent at Marriot Hotels' call center. However, I'm not hearing my daughter, from Minneapolis. She calls, we connect, she hears me, I don't hear her. The other issue, is, I have had a couple calls from a fellow in Tennessee, who is on Ekiga, on a Windows machine. He calls, hears me, or leaves voice message, but, when he hangs up, I have lost all sound on my system, and I can't get to my menus, so have to ctl-alt-backspace and log out of session, then log back in. Can't get a fix on whether this is voxalot issue, or ekiga issue, or my feeble attempt to be a systems admin. Any ideas on how to narrow down issues?