If there's anything in particular you have questions about, please ask away. I recommend ATOS/Unify's training courses, as they provide quite a bit of information and some of the more basic courses are available online.
LoPath
Maintain HiPath 4000 V5 & V6, OpenScape Xpert V4 & V6, OpenScape Xpressions V7, OpenScape Contact Center V8, OpenScape Voice V9