I have looked at many Asteisk packages and AdminsParadise's implementation was one.  I was interested in their cluster setup and how well it worked.

AdminParadise's implementation does not work well at all.  Let me begin by saying Clustering is VERY possible with Asterisk and CentOS 5 is the easiest I found to do it with. 

First they copied the exact code presented by salahuddin66 Dhaka, Bangladesh in 2006. His code is linked to in my links section. 

These are the problems I found with their implementation:

Their install failed to properly copy a file called amportalhb.  This file is nothing more than an old way to make amportal respond to a start and stop command with results which it now does so only a symbolic link is necessary to the amportal file.  All files that must be executed upon a heartbeat fail must respond to a start and stop command - which is why this file was made back in the days when amportal was not using the correct syntax.

Lets get into the real problems - select more to read the remainder of this article...