Alcatel (or recently Alcatel-Lucent) OmniPCX Enterprise is a new name for Alcatel 4400 PBX, shoutcut for this PBX is ALU OXE.
You need at least Release 7 of ALU's OXE.

1st see if you got license for ip trunking on alcatel:
go for command "spadmin" and see lock no.