pls I want to know the difference btw cisco unified communications manager and cisco unified communications manager xpress,I als want to know the advantage one has over the other.
Just to add a note to the great tips from Chris (+5 points for this Chris :)
Here is a doc (attached) called "Selling Cisco Unified Communications Express". It gives a feature comparison between CME 4.0 and CCM 4 and 5, as well as compares CUE to Unity and Unity Connection.
Hope this helps!