27 Service access number translation

25 P-CSCF restoration

22 Delivery of original destination identity

23 Telepresence using IMS

24 Barring of premium rate numbers

21 Overload control

17 Optimal Media Routeing

19 Roaming Architecture for Voice over IMS with Local Breakout

18 Inter-UE transfer (IUT)

20 Delivery of Media Resource Broker address information