On a slow weekend I thought I would stir up some reader interest by putting the ball in your court.  Very recently I had the opportunity to sit in a Voice over IP (VoIP) class covering both subject and security.  Great class, outstanding instructor, and excellent classmates made for some good discussion.  The instructor had a lot of experience from both the data and telco sides of the house.   I come from a data background, as do most of you reading this right now.  The input I am hoping to receive over the next couple of days is from you, the readers, who have had hands on experience, and would like to share that experience with others.  I’d really like to hear from the telco-background folks, readers from the PBX world making the foray into VoIP.