Hi Lea
There are many additional features,I’ll mention only the Radio & Data Part.
1.AMR Progressive power control
2.BCCH Super -reuse
3.C/I based HO evaluation
4.Intelligent selective paging
5.Double power DTRX for Flexi BTS.
6.Intelligent underlay overlay
7.Multi point Gb interface
8.Smart Radio for EDGE
9.PCU2 pooling
10.Priority class based QoS.
There are few more,but I could reckon this much.Hope it helps.
Br\\
Bijoy