After you can check on VHE set, the buddy list (dumpIctIM) 
 
23.4  Use cases 
23.4.1 How to get the white list of a set 
Connect the set thru ssh and launch /usr/bin/ICTApplication/ICTCliGateLite –call IctUser:consultWhiteList --
args "" 
23.4.2 Assistant can not transfer a call to boss from her DECT 
Symptom : assistant would like to transfer a call to her boss from her DECT 
Solution : Add the assistant dect number in the manager white list