I could not determine from any external sourcing how UCS releases relate to known Debian versions. I gathered that 3.0 related to/was derived from Squeeze (Debian 6.0) from an article, but could find nothing about 3.2 or any useful info about this findable.
This related to the question of packaging. I noticed the UCS packaging guide for 3.2 still refers to rather old ways of creating and maintaining debian packages, when using debhelper, especially dh >= 8, makes it so very much simpler to do. This made me consider that 3.2 might still be pre-wheezy.