As there is no direct upgrade through DMA from 4.0(2) to 7.1(3A), is there any tool which can extract information from 4.x and can import it in 7.x ?
if thats no the option, What will be the best and least risk approach?
the upgrade to be on New IBM 7835 I3 Servers.
Current system has Extension mobility and Voicemail through IPFX.
nothing major configuration changes required.