Good thought Ken. I just put in a Polycom viewstation 512 DCP through the Definity using the existing ISDN PRI's. And next week I get to install the Sony unit using a couple of BRI's. I still have a few issues with the Viewstation, but it does work, I believe it is the provider's ISDN's giving us the problem. Hopefully after our LD ISDN get configured for multimedia we will eliminate our problem. Again, great idea Ken.