thsnks for replies. I belive it is a IP406v2, because It got 8 DS and 2 analogue ports. But still not sure it can be upgrade to v4.+
form system monitor:
53987225mS PRN: Monitor Started IP=192.168.10.23 IP 406 DS 3.2(57)
53987225mS PRN: LAW=A PRI=0, BRI=0, ALOG=8, ADSL=0 VCOMP=4, MDM=0, WAN=0, MODU=2 LANM=0 CkSRC=0 VMAIL=1(VER=2 TYP=1) CALLS=2(TOT=390)
53987411mS RES: Fri 7/11/2008 12:10:11 FreeMem=47951340(14) CMMsg=6 (8) Buff=100 603 798 1084 3 Links=5415 Elements=154
54028070mS CMExtnRx: v=4313, p1=3
CMReleaseComp
Line: type=NoLine 0 Call: lid=0 id=1834 in=0