The MX250 IP PBX is a feature-rich enterprise-class business IP telephony system that supports high quality VoIP and Unified Communications services for up to 250 users on a single appliance and can be seamlessly expanded through an MXgroup network to support up to 10,000 users and 128 offices across an enterprise-wide Unified Communications system. The award-winning MX250 IP PBX is based on SIP Open Standards. In addition to Zultys’ enterprise-class IP phones, it can easily support legacy phones and a wide range of SIP-based third party devices to help companies more easily deploy the IP telephony system they need.