IP DECT 3711s not displaying group name until answered

[IPOTechy]

I am currently running 406 V3.1(48)with 3 x IP cell stations and 13 x 3711 handsets. Primary function to answer incoming calls from which could be any one of 14 huntgroups and have to be answered accordingly with the appropiate company greeting.n Unfortunately the handsets display the cli number on both disply line until answered which then displays the grp name on screen. Whats the point of that? I understand there is no requirement for the dect integration licence on the IP dect but there has to be a good reason for this