asterisk users - Feb 2006 - Viking CPC-Disconnect

Someone on the list a while back suggested that if you were having 
problems with call disconnects, to look into a product from Viking 
TellecomSolutions called cpc-disconnect:

http://www.vikingtelecomsolutions.com/catalog/model_CPC-1.htm

I received my unit on Friday and put it into place Saturday afternoon 
(SBC in this area doesn't supply call disconnect supervision).  The unit 
was acting correctly, according to the instructions, but Asterisk never 
registered a disconnect.

Is anybody using this unit?  And, if so, can you share your setup?

I'm currently using an Adit 600 channel bank, the cpc is sitting between 
the phone line and the Adit.

Thanks!

Doug