The need to converge voice and data communication on the IP network occurre
d from the field of WAN with IP-VPN to establish effective way of communica
tions. And now, the need is also requested on the extension side of PBX to
improve implementation/maintainability, and to reduce TCO (Total Cost of Ow
nership). In this paper, we would like to introduce our new solution called
" ToIP LAN solution " which provides advanced and sophisticated extension
features of NEAX2000IVS(2)/NEAX2400IPX in the office LAN environment.