Newbie questions

[Bob McGowan]

Hello list,

I'm totally new to this application and am having trouble getting 
communication to work at either the audio or video level.  Chat seems to 
be fine.

My first question would be if there are specific ports that need to be 
opened in the firewall?

I did find one other request for this information but it does not appear 
to have been answered, hence this repeat.

Thanks,

Bob