They can hear the speakers and moderator, but you cannot hear them. The only exception to this is during the question and answer session when KRM's moderator opens up one line at a time. Speak clearly and at a moderate pace. Very often is a large audience listening to the seminar. A connection to the program may have 5 or more people listening at each site.
Simultaneous remarks are particularly hard to understand on the telephone.
Try to be patient and not speak on top of others when you are in group discussions or responding to listeners' questions. You can use the polling feature to allow the listening sites to vote on questions via their touch tone keypads. Each site has one vote. This is a great way to involve the audience in the program. Work hard at making the questions clear.