The Zultys MX-SE is a smaller version of the Zultys MX250, supporting up to 50 users in one box. It has all the same features of the MX250 and supports analog, digital PRI and SIP voice interface options. The same MX GUI admin can be used for customer setup and system diagnosis. And as a software-based phone system, customers need only to keep their software current to enjoy product longevity and the low cost of ownership.