Wilson,
Unfortunately, this type of log will really not show anything to the problem. I have found that in 90% of the cases where there is one-way audio, the problem turns out to be a firewall somewhere, on one end or the other that is either blocking voice ports or is not translating from public to private correctly. Or, the ISP is blocking VoIP.
I do not think I have seen more that 2 or 3 cases where the tenor was a problem on this since there is no setting to have only voice in one direction.
Check your network out, check any firewalls and NATs that is most likely where you will find the problem.