V4 is nice, one server controls multiple gateways, new hardware the Compact SMH and the new MGU board, split installation process make it more practical to upgrade large TSE sites, 10 digit number extension, new CTI interfaces with SDK kits, new MTS and MP pages have a more professional look, more SIP features, more features on IP phones combined with the D446 phones V4 will take the MX-ONE into the next generation with more capabilities and more features, addressing both segments of the market small site installations will get a push from the new hardware, large site need all the new features and multiple gateways will revolutionize how we look at MX-One dimensioning.
Really great work from the Aastra MX-One team.
TELEC3