Thanks for responding.

So the 4 DID lines that are physically cross connected to an RDDU would be considered Analog DID's?

If i unplugged the T1 from the channel bank and plugged it straight into the new system that doesn't have an RDDU but does have a digital trunk module (RJ45), would the service provider need to do anything on their end?

You win some, you lose some, and some get rained out, but you gotta suit up for them all.
J. Askenberg