[Freeswitch-users] advise to troubleshoot a call

Hello, Recently I (well my wife) is having voice problem when she is on a call. Typically she can hear people but they can't The problem is that it is not all the time and when it happens it last a few seconds then all back to normal... then later on it happens again. I am still in the process of trying to find if there is a pattern in the problem but I would like to be able to look at the log from FS. What would you recommend to be able to look at the log (what debug level). Any tips to make it easier to identify an issue in the log (like message to look for?) Thanks Philippe