Grandstream's IP-PBX product segment consists of the GXE5024 and GXE5028. The GXE502x appliance is a powerful all-in-one voice + video + fax + data communication solution for the small to medium sized business, especially companies with sub-30 seats per location. The GXE502x takes modern business communication systems to a heightened level of innovation, quality, reliability, ease of deployment and affordability. Designed from ground up to support distributed IP communications, intelligent unified messaging, advanced application integration and popular PBX features, the GXE502x product family also optimally integrates legacy PSTN trunk and telephone interfaces for fail-safe hybrid communication needs in all circumstances including power or network loss.