difference between Messaging 2.0 & 2.5 ?

[Phoneguy15]

I cannot seem to remember the differences between a Merlin Messaging 2.0 & 2.5. I have a customer with a 2.5 that has crapped out and I found that we have a 2.0 that was hidden in stock. The salesman doesn't want to be going backwards on technology, but, it would be nice to get the 2.0 out of inventory.
I want to say that the 2.5 supports DAS and the 2.0 doesn't, but, I can't remember if that is the only difference.
I checked Avaya's web site and they have conveniently removed the docs for the 2.0

 

[ttech]

At the top of the messaging support page it lets you pick all releases or most recent release choose all and the 2.0 docs are there.

-Don